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Re: [Maria-developers] [Commits] 667d178: MDEV-14576 Include full name of object in message about incorrect value for column.
by Sergei Golubchik 12 Dec '18

12 Dec '18

Hi, Alexey! Looks ok. I didn't expect make_truncated_value_warning to be used that much :( Jusr one comment below: On Nov 13, Alexey Botchkov wrote: > revision-id: 667d1786a96a40ee5074c9f1b493c7cf05a85cca (mariadb-10.2.18-80-g667d178) > parent(s): 59b87e75d04f0ed75256724c78f7fd7af2f96e9b > committer: Alexey Botchkov > timestamp: 2018-11-13 00:11:32 +0400 > message: > > MDEV-14576 Include full name of object in message about incorrect value for column. > > The error message modified. > Then the TABLE_SHARE::error_table_name() implementation taken from 10.3, > to be used as a name of the table in this message. > > diff --git a/sql/field.cc b/sql/field.cc > index caa84dc..4cb6eb2 100644 > --- a/sql/field.cc > +++ b/sql/field.cc > @@ -2079,7 +2079,7 @@ bool Field_num::get_date(MYSQL_TIME *ltime,ulonglong fuzzydate) > longlong nr= val_int(); > bool neg= !(flags & UNSIGNED_FLAG) && nr < 0; > return int_to_datetime_with_warn(neg, neg ? -nr : nr, ltime, fuzzydate, > - field_name); > + table->s, field_name); couldn't you just pass this instead of this->table->s and this->field_name ? > } > > > diff --git a/sql/sql_class.cc b/sql/sql_class.cc > index 71d5b80..8f8607d 100644 > --- a/sql/sql_class.cc > +++ b/sql/sql_class.cc > @@ -3009,6 +3009,10 @@ int select_export::send_data(List<Item> &items) > error_pos= copier.most_important_error_pos(); > if (error_pos) > { > + /* > + TODO: > + add new error message that will show user this printable_buff > + > char printable_buff[32]; > convert_to_printable(printable_buff, sizeof(printable_buff), > error_pos, res->ptr() + res->length() - error_pos, > @@ -3018,6 +3022,11 @@ int select_export::send_data(List<Item> &items) > ER_THD(thd, ER_TRUNCATED_WRONG_VALUE_FOR_FIELD), > "string", printable_buff, > item->name, static_cast<long>(row_count)); > + */ > + push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN, > + ER_TRUNCATED_WRONG_VALUE_FOR_FIELD, > + ER_THD(thd, WARN_DATA_TRUNCATED), > + item->name, static_cast<long>(row_count)); Why not ER_TRUNCATED_WRONG_VALUE "Truncated incorrect %-.32s value: '%-.128s'" ? Ah, it has no row number... > } > else if (copier.source_end_pos() < res->ptr() + res->length()) > { Regards, Sergei Chief Architect MariaDB and security(a)mariadb.org

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[Maria-developers] Extending storage engine API for random-row extraction for histogram collection (and others)
by Vicențiu Ciorbaru 11 Dec '18

11 Dec '18

Hi! Here is my proposal on extending the storage engine API to provide a functionality for retrieving random rows from tables (those that have indexes). The storage engines for which I plan to implement this are: MyISAM, Aria, Innodb. Possibly RocksDB, TokuDB. --- a/sql/handler.h +++ b/sql/handler.h @@ -2927,7 +2927,7 @@ class handler :public Sql_alloc /** Length of ref (1-8 or the clustered key length) */ uint ref_length; FT_INFO *ft_handler; - enum init_stat { NONE=0, INDEX, RND }; + enum init_stat { NONE=0, INDEX, RND, RANDOM }; init_stat inited, pre_inited; ........ + virtual int ha_random_sample_init() __attribute__((warn_unused_result)) + { + DBUG_ENTER("ha_random_sample_init"); + inited= RANDOM; + DBUG_RETURN(random_sample_init()); + } + virtual int ha_random_sample(uint inx, + key_range *min_key, + key_range *max_key) + __attribute__((warn_unused_result)) + { + DBUG_ENTER("ha_random_sample"); + DBUG_ASSERT(inited == RANDOM); + DBUG_RETURN(random_sample(inx, min_key, max_key)); + } + virtual int ha_random_sample_end() __attribute__((warn_unused_result)) + { + DBUG_ENTER("ha_random_sample_end"); + inited= NONE; + DBUG_RETURN(random_sample_end()); + } + This is the default implementation for a storage engine which does not support it: + virtual int random_sample_init() { return 0; } ; + virtual int random_sample(uint idx, key_range *min_key, key_range *max_key) + { + return HA_ERR_WRONG_COMMAND; + } + virtual int random_sample_end() { return 0; }; Alternative ideas: random_sample_init() takes the idx as a parameter and random_sample just fetches a row from the range using the index previously specified. The range can be left unspecified with nulls to provide a fetch from the full table range. I don't know enough about storage engine internals to know if an index declaration within the init function instead of within the "sample" function is better. Maybe I am complicating it too much and a simple random_sample() function is sufficient, kind of how ha_records_in_range does it. Thoughts? Vicențiu

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Re: [Maria-developers] [Commits] 07f5d03: MDEV-5313 Improving merge audit api.
by Sergei Golubchik 10 Dec '18

10 Dec '18

Hi, Alexey! On Dec 03, Alexey Botchkov wrote: > revision-id: 07f5d036fbb5bdcb011a84f5c882a062d9e609e7 (mariadb-10.4.0-54-g07f5d03) > parent(s): 3afae13b548c903d86a55530d59fbf7d8666281f > committer: Alexey Botchkov > timestamp: 2018-12-03 02:35:52 +0400 > message: > > MDEV-5313 Improving merge audit api. "improving audit api" ? we don't merge it anymore, right? > service_json and service_cfg_table interfaces added. > > diff --git a/include/mysql/service_cfg_table.h b/include/mysql/service_cfg_table.h > new file mode 100644 > index 0000000..36660ff > --- /dev/null > +++ b/include/mysql/service_cfg_table.h > @@ -0,0 +1,109 @@ > +/* Copyright (C) 2018 MariaDB Corporation > + > + This program is free software; you can redistribute it and/or modify > + it under the terms of the GNU General Public License as published by > + the Free Software Foundation; version 2 of the License. > + > + This program is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + GNU General Public License for more details. > + > + You should have received a copy of the GNU General Public License > + along with this program; if not, write to the Free Software > + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA */ > + > +#ifndef MYSQL_SERVICE_CFG_TABLE > +#define MYSQL_SERVICE_CFG_TABLE > + > +/** > + @file > + cfg table service > + > + Reading plugin settings from the server table. > + > + This service lets the plugin to read it's settings > + from the server table. > + This 'cfg' table has two VARCHAR fields per row > + which are > + 'id' - the name of the setting > + 'value' - the value of the respective 'id' setting > + The structure 'cfg_table_row' reflects this format for > + the data interchange with the service. > + Fuctions of the service: > + cfg_table_check_exists > + checks if the table exists. > + cfg_table_create - creates the table > + parameers: > + table_name - the name of the table > + int id_len, int value_len - the length of the 'id' and 'value' > + fields. > + const struct cfg_table_row *defaults - table will be filled > + with these default rows. > + The list of rows is ended by {0,0} row > + > + cfg_table_set - replaces (inserts if not exists) the setting > + parameters: > + table_name - the name of the table > + const char *id, const char *value - the 'id' and the new value > + > + cfg_table_get - reads the cft tale content > + It return the number of rows in the table or -1 if error. > + parameters: > + table_name, > + struct cfg_table_row *data_buf - buffer to store the records > + int n_buf_row - the size of the buffer > +*/ This is, of course, a very much overdue functionality. I'm not sure it should be limited to key/value pairs. On the other hand, if it's plugin config only, loaded once on startup - then it should be fine. Just need to make clear it's not for run-time data. In the implementation, make sure that when a table is opened, there are no other opened/locked tables. This will avoid deadlocks and prevent plugins from using it from inside another statement. Also, * I'd put the table name into pluginname namespace. Not quite sure how to do it, though. * Why do you need cfg_table_check_exists and cfg_table_create? A plugin only needs set and get methods. A table is automatically created on the first access, a plugin can always assume it exists. * may be even just one table, plugin_config? with two columns plugin_name and json_config? plugin gets the json on startup and that's all. No way for a plugin to access the table directly. > diff --git a/include/mysql/service_json.h b/include/mysql/service_json.h > new file mode 100644 > index 0000000..5d0e260 > --- /dev/null > +++ b/include/mysql/service_json.h ... > +int js_type(const char *js, const char *js_end, > + enum js_value_types *vt, > + const char **v, int *vlen); > +int js_get_array_item(const char *js, const char *js_end, int n_item, > + enum js_value_types *vt, > + const char **v, int *vlen); > +int js_get_object_key(const char *js, const char *js_end, const char *key, > + enum js_value_types *vt, > + const char **v, int *vlen); > +int js_get_object_nkey(const char *js,const char *js_end, int nkey, > + const char **keyname, const char **keyname_end, > + enum js_value_types *vt, > + const char **v, int *vlen); I wouldn't introduce ten different apis to access json. Just json_get(json, path) and json_set(json, path, value). Same path syntax everywhere, like on SQL level. Regards, Sergei Chief Architect MariaDB and security(a)mariadb.org

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Re: [Maria-developers] MDEV-17658 review.
by Sergei Golubchik 09 Dec '18

09 Dec '18

Hi, Alexey! It's important for USER_TABLE to be last. And there can be only one last value in the enum, if I add TABLES_MAX, someone will eventually put new table just before TABLES_MAX (tests will catch it, but it might take hours to track down to the actual reason). So, it's safer to have just one last element in the enum, USER_TABLE. On Dec 09, Alexey Botchkov wrote: > Hello, Sergei! > > I haven't found anything serious to improve there in your changes. > sql_acl.cc gets nicer with this patch. So ok to push. > > Only question left - > - TABLES_MAX // <== always the last > + USER_TABLE // <== always the last > > Why not preserve the TABLES_MAX? Seems more self-explaining. > +static LEX_CSTRING MYSQL_TABLE_NAME[USER_TABLE+1]= > could be > +static LEX_CSTRING MYSQL_TABLE_NAME[TABLES_MAX]= > and a couple of similar places. > > Best regards. > HF Regards, Sergei Chief Architect MariaDB and security(a)mariadb.org

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Re: [Maria-developers] [Commits] 8bfb140d5dc: Move deletion of old GTID rows to slave background thread
by andrei.elkin＠pp.inet.fi 07 Dec '18

07 Dec '18

Kristian, hello. The patch is great and instructive in many ways. Thanks! There is something to improve in the test organization, like to base two tests of > storage/rocksdb/mysql-test/rocksdb_rpl/t/mdev12179.test > storage/tokudb /mysql-test/tokudb_rpl /t/mdev12179.test on a common parent. I thought for a second to place it in mysql-test/include/ but again the parent file is so specific that I had to stop it. This apparently can wait until a third engine shows up and require the same coverage. Cheers, Andrei > revision-id: 8bfb140d5dc247c183787b8a0a1799cf375845bd (mariadb-10.3.10-25-g8bfb140d5dc) > parent(s): 74387028a06c557f36a0fd1bbde347f1551c8fb7 > author: Kristian Nielsen > committer: Kristian Nielsen > timestamp: 2018-11-25 19:38:33 +0100 > message: > > Move deletion of old GTID rows to slave background thread > > This patch changes how old rows in mysql.gtid_slave_pos* tables are deleted. > Instead of doing it as part of every replicated transaction in > record_gtid(), it is done periodically (every @@gtid_cleanup_batch_size > transaction) in the slave background thread. > > This removes the deletion step from the replication process in SQL or worker > threads, which could speed up replication with many small transactions. It > also decreases contention on the global mutex LOCK_slave_state. And it > simplifies the logic, eg. when a replicated transaction fails after having > deleted old rows. > > With this patch, the deletion of old GTID rows happens asynchroneously and > slightly non-deterministic. Thus the number of old rows in > mysql.gtid_slave_pos can temporarily exceed @@gtid_cleanup_batch_size. But > all old rows will be deleted eventually after sufficiently many new GTIDs > have been replicated. > > --- > mysql-test/main/mysqld--help.result | 10 + > mysql-test/suite/rpl/r/rpl_gtid_mdev4484.result | 40 +- > mysql-test/suite/rpl/r/rpl_gtid_stop_start.result | 8 +- > .../suite/rpl/r/rpl_parallel_optimistic.result | 14 +- > mysql-test/suite/rpl/t/rpl_gtid_mdev4484.test | 68 +++- > .../suite/rpl/t/rpl_parallel_optimistic.test | 42 ++- > .../sys_vars/r/sysvars_server_notembedded.result | 14 + > sql/log_event.cc | 6 +- > sql/mysqld.cc | 1 + > sql/mysqld.h | 1 + > sql/rpl_gtid.cc | 413 +++++++++++++-------- > sql/rpl_gtid.h | 12 +- > sql/rpl_rli.cc | 87 +---- > sql/rpl_rli.h | 11 - > sql/slave.cc | 35 +- > sql/slave.h | 1 + > sql/sys_vars.cc | 13 + > .../mysql-test/rocksdb_rpl/r/mdev12179.result | 18 + > .../mysql-test/rocksdb_rpl/t/mdev12179.test | 85 +++++ > .../mysql-test/tokudb_rpl/r/mdev12179.result | 18 + > .../tokudb/mysql-test/tokudb_rpl/t/mdev12179.test | 85 +++++ > 21 files changed, 675 insertions(+), 307 deletions(-) > > diff --git a/mysql-test/main/mysqld--help.result b/mysql-test/main/mysqld--help.result > index 5a7153f32d3..4f801ec5275 100644 > --- a/mysql-test/main/mysqld--help.result > +++ b/mysql-test/main/mysqld--help.result > @@ -294,6 +294,15 @@ The following specify which files/extra groups are read (specified before remain > --group-concat-max-len=# > The maximum length of the result of function > GROUP_CONCAT() > + --gtid-cleanup-batch-size=# > + Normally does not need tuning. How many old rows must > + accumulate in the mysql.gtid_slave_pos table before a > + background job will be run to delete them. Can be > + increased to reduce number of commits if using many > + different engines with --gtid_pos_auto_engines, or to > + reduce CPU overhead if using a huge number of different > + gtid_domain_ids. Can be decreased to reduce number of old > + rows in the table. > --gtid-domain-id=# Used with global transaction ID to identify logically > independent replication streams. When events can > propagate through multiple parallel paths (for example > @@ -1425,6 +1434,7 @@ gdb FALSE > general-log FALSE > getopt-prefix-matching FALSE > group-concat-max-len 1048576 > +gtid-cleanup-batch-size 64 > gtid-domain-id 0 > gtid-ignore-duplicates FALSE > gtid-pos-auto-engines > diff --git a/mysql-test/suite/rpl/r/rpl_gtid_mdev4484.result b/mysql-test/suite/rpl/r/rpl_gtid_mdev4484.result > index aaeb0c8f119..55d2831dcf4 100644 > --- a/mysql-test/suite/rpl/r/rpl_gtid_mdev4484.result > +++ b/mysql-test/suite/rpl/r/rpl_gtid_mdev4484.result > @@ -16,36 +16,32 @@ INSERT INTO t1 VALUES (1); > connection slave; > connection slave; > include/stop_slave.inc > +SET @old_gtid_cleanup_batch_size= @@GLOBAL.gtid_cleanup_batch_size; > +SET GLOBAL gtid_cleanup_batch_size= 2; > SET @old_dbug= @@GLOBAL.debug_dbug; > SET GLOBAL debug_dbug="+d,gtid_slave_pos_simulate_failed_delete"; > SET sql_log_bin= 0; > -CALL mtr.add_suppression("Can't find file"); > +CALL mtr.add_suppression("<DEBUG> Error deleting old GTID row"); > SET sql_log_bin= 1; > include/start_slave.inc > connection master; > -INSERT INTO t1 VALUES (2); > -connection slave; > -include/wait_for_slave_sql_error.inc [errno=1942] > -STOP SLAVE IO_THREAD; > -SELECT domain_id, server_id, seq_no FROM mysql.gtid_slave_pos > -ORDER BY domain_id, sub_id DESC LIMIT 1; > -domain_id server_id seq_no > -0 1 3 > +connection slave; > +SELECT COUNT(*), MAX(seq_no) INTO @pre_count, @pre_max_seq_no > +FROM mysql.gtid_slave_pos; > +SELECT IF(@pre_count >= 20, "OK", CONCAT("Error: too few rows seen while errors injected: ", @pre_count)); > +IF(@pre_count >= 20, "OK", CONCAT("Error: too few rows seen while errors injected: ", @pre_count)) > +OK > SET GLOBAL debug_dbug= @old_dbug; > -include/start_slave.inc > connection master; > -INSERT INTO t1 VALUES (3); > -connection slave; > -connection slave; > -SELECT domain_id, server_id, seq_no FROM mysql.gtid_slave_pos > -ORDER BY domain_id, sub_id DESC LIMIT 1; > -domain_id server_id seq_no > -0 1 4 > -SELECT * FROM t1 ORDER BY i; > -i > -1 > -2 > -3 > +connection slave; > +connection slave; > +SELECT IF(COUNT(*) >= 1, "OK", CONCAT("Error: too few rows seen after errors no longer injected: ", COUNT(*))) > +FROM mysql.gtid_slave_pos > +WHERE seq_no <= @pre_max_seq_no; > +IF(COUNT(*) >= 1, "OK", CONCAT("Error: too few rows seen after errors no longer injected: ", COUNT(*))) > +OK > connection master; > DROP TABLE t1; > +connection slave; > +SET GLOBAL gtid_cleanup_batch_size= @old_gtid_cleanup_batch_size; > include/rpl_end.inc > diff --git a/mysql-test/suite/rpl/r/rpl_gtid_stop_start.result b/mysql-test/suite/rpl/r/rpl_gtid_stop_start.result > index ff845794c22..b27ffed9f94 100644 > --- a/mysql-test/suite/rpl/r/rpl_gtid_stop_start.result > +++ b/mysql-test/suite/rpl/r/rpl_gtid_stop_start.result > @@ -171,7 +171,7 @@ include/start_slave.inc > *** MDEV-4692: mysql.gtid_slave_pos accumulates values for a domain *** > SELECT domain_id, COUNT(*) FROM mysql.gtid_slave_pos GROUP BY domain_id; > domain_id COUNT(*) > -0 2 > +0 3 > 1 2 > connection server_1; > INSERT INTO t1 VALUES (11); > @@ -179,7 +179,7 @@ connection server_2; > FLUSH NO_WRITE_TO_BINLOG TABLES; > SELECT domain_id, COUNT(*) FROM mysql.gtid_slave_pos GROUP BY domain_id; > domain_id COUNT(*) > -0 2 > +0 4 > 1 2 > include/start_slave.inc > connection server_1; > @@ -189,8 +189,8 @@ connection server_2; > FLUSH NO_WRITE_TO_BINLOG TABLES; > SELECT domain_id, COUNT(*) FROM mysql.gtid_slave_pos GROUP BY domain_id; > domain_id COUNT(*) > -0 2 > -1 2 > +0 3 > +1 1 > *** MDEV-4650: show variables; ERROR 1946 (HY000): Failed to load replication slave GTID position *** > connection server_2; > SET sql_log_bin=0; > diff --git a/mysql-test/suite/rpl/r/rpl_parallel_optimistic.result b/mysql-test/suite/rpl/r/rpl_parallel_optimistic.result > index ca202a66b0e..83343e52cab 100644 > --- a/mysql-test/suite/rpl/r/rpl_parallel_optimistic.result > +++ b/mysql-test/suite/rpl/r/rpl_parallel_optimistic.result > @@ -12,6 +12,8 @@ SET GLOBAL slave_parallel_threads=10; > CHANGE MASTER TO master_use_gtid=slave_pos; > SET @old_parallel_mode=@@GLOBAL.slave_parallel_mode; > SET GLOBAL slave_parallel_mode='optimistic'; > +SET @old_gtid_cleanup_batch_size= @@GLOBAL.gtid_cleanup_batch_size; > +SET GLOBAL gtid_cleanup_batch_size= 1000000; > connection server_1; > INSERT INTO t1 VALUES(1,1); > BEGIN; > @@ -131,6 +133,11 @@ c > 204 > 205 > 206 > +SELECT IF(COUNT(*) >= 30, "OK", CONCAT("Error: too few old rows found: ", COUNT(*))) > +FROM mysql.gtid_slave_pos; > +IF(COUNT(*) >= 30, "OK", CONCAT("Error: too few old rows found: ", COUNT(*))) > +OK > +SET GLOBAL gtid_cleanup_batch_size=1; > *** Test @@skip_parallel_replication. *** > connection server_2; > include/stop_slave.inc > @@ -651,9 +658,10 @@ DROP TABLE t1, t2, t3; > include/save_master_gtid.inc > connection server_2; > include/sync_with_master_gtid.inc > -Check that no more than the expected last four GTIDs are in mysql.gtid_slave_pos > -select count(4) <= 4 from mysql.gtid_slave_pos order by domain_id, sub_id; > -count(4) <= 4 > +SELECT COUNT(*) <= 5*@@GLOBAL.gtid_cleanup_batch_size > +FROM mysql.gtid_slave_pos; > +COUNT(*) <= 5*@@GLOBAL.gtid_cleanup_batch_size > 1 > +SET GLOBAL gtid_cleanup_batch_size= @old_gtid_cleanup_batch_size; > connection server_1; > include/rpl_end.inc > diff --git a/mysql-test/suite/rpl/t/rpl_gtid_mdev4484.test b/mysql-test/suite/rpl/t/rpl_gtid_mdev4484.test > index e1f5696f5a1..a28bff3d27a 100644 > --- a/mysql-test/suite/rpl/t/rpl_gtid_mdev4484.test > +++ b/mysql-test/suite/rpl/t/rpl_gtid_mdev4484.test > @@ -28,37 +28,79 @@ INSERT INTO t1 VALUES (1); > # Inject an artificial error deleting entries, and check that the error handling code works. > --connection slave > --source include/stop_slave.inc > +SET @old_gtid_cleanup_batch_size= @@GLOBAL.gtid_cleanup_batch_size; > +SET GLOBAL gtid_cleanup_batch_size= 2; > SET @old_dbug= @@GLOBAL.debug_dbug; > SET GLOBAL debug_dbug="+d,gtid_slave_pos_simulate_failed_delete"; > SET sql_log_bin= 0; > -CALL mtr.add_suppression("Can't find file"); > +CALL mtr.add_suppression("<DEBUG> Error deleting old GTID row"); > SET sql_log_bin= 1; > --source include/start_slave.inc > > --connection master > -INSERT INTO t1 VALUES (2); > +--disable_query_log > +let $i = 20; > +while ($i) { > + eval INSERT INTO t1 VALUES ($i+10); > + dec $i; > +} > +--enable_query_log > +--save_master_pos > > --connection slave > ---let $slave_sql_errno= 1942 > ---source include/wait_for_slave_sql_error.inc > -STOP SLAVE IO_THREAD; > -SELECT domain_id, server_id, seq_no FROM mysql.gtid_slave_pos > - ORDER BY domain_id, sub_id DESC LIMIT 1; > +--sync_with_master > + > +# Now wait for the slave background thread to try to delete old rows and > +# hit the error injection. > +--let _TEST_MYSQLD_ERROR_LOG=$MYSQLTEST_VARDIR/log/mysqld.2.err > +--perl > + open F, '<', $ENV{'_TEST_MYSQLD_ERROR_LOG'} or die; > + outer: while (1) { > + inner: while (<F>) { > + last outer if /<DEBUG> Error deleting old GTID row/; > + } > + # Easy way to do sub-second sleep without extra modules. > + select(undef, undef, undef, 0.1); > + } > +EOF > + > +# Since we injected error in the cleanup code, the rows should remain in > +# mysql.gtid_slave_pos. Check that we have at least 20 (more robust against > +# non-deterministic cleanup and future changes than checking for exact number). > +SELECT COUNT(*), MAX(seq_no) INTO @pre_count, @pre_max_seq_no > + FROM mysql.gtid_slave_pos; > +SELECT IF(@pre_count >= 20, "OK", CONCAT("Error: too few rows seen while errors injected: ", @pre_count)); > SET GLOBAL debug_dbug= @old_dbug; > ---source include/start_slave.inc > > --connection master > -INSERT INTO t1 VALUES (3); > +--disable_query_log > +let $i = 20; > +while ($i) { > + eval INSERT INTO t1 VALUES ($i+40); > + dec $i; > +} > +--enable_query_log > --sync_slave_with_master > > --connection slave > -SELECT domain_id, server_id, seq_no FROM mysql.gtid_slave_pos > - ORDER BY domain_id, sub_id DESC LIMIT 1; > -SELECT * FROM t1 ORDER BY i; > - > +# Now check that 1) rows are being deleted again after removing error > +# injection, and 2) old rows are left that failed their delete while errors > +# where injected (again compensating for non-deterministic deletion). > +# Deletion is async and slightly non-deterministic, so we wait for at > +# least 10 of the 20 new rows to be deleted. > +let $wait_condition= > + SELECT COUNT(*) <= 20-10 > + FROM mysql.gtid_slave_pos > + WHERE seq_no > @pre_max_seq_no; > +--source include/wait_condition.inc > +SELECT IF(COUNT(*) >= 1, "OK", CONCAT("Error: too few rows seen after errors no longer injected: ", COUNT(*))) > + FROM mysql.gtid_slave_pos > + WHERE seq_no <= @pre_max_seq_no; > > # Clean up > --connection master > DROP TABLE t1; > +--connection slave > +SET GLOBAL gtid_cleanup_batch_size= @old_gtid_cleanup_batch_size; > > --source include/rpl_end.inc > diff --git a/mysql-test/suite/rpl/t/rpl_parallel_optimistic.test b/mysql-test/suite/rpl/t/rpl_parallel_optimistic.test > index e08472d5f51..0060cf4416c 100644 > --- a/mysql-test/suite/rpl/t/rpl_parallel_optimistic.test > +++ b/mysql-test/suite/rpl/t/rpl_parallel_optimistic.test > @@ -21,6 +21,10 @@ SET GLOBAL slave_parallel_threads=10; > CHANGE MASTER TO master_use_gtid=slave_pos; > SET @old_parallel_mode=@@GLOBAL.slave_parallel_mode; > SET GLOBAL slave_parallel_mode='optimistic'; > +# Run the first part of the test with high batch size and see that > +# old rows remain in the table. > +SET @old_gtid_cleanup_batch_size= @@GLOBAL.gtid_cleanup_batch_size; > +SET GLOBAL gtid_cleanup_batch_size= 1000000; > > > --connection server_1 > @@ -108,7 +112,12 @@ SELECT * FROM t3 ORDER BY c; > SELECT * FROM t1 ORDER BY a; > SELECT * FROM t2 ORDER BY a; > SELECT * FROM t3 ORDER BY c; > -#SHOW STATUS LIKE 'Slave_retried_transactions'; > +# Check that we have a bunch of old rows left-over - they were not deleted > +# due to high @@gtid_cleanup_batch_size. Then set a low > +# @@gtid_cleanup_batch_size so we can test that rows start being deleted. > +SELECT IF(COUNT(*) >= 30, "OK", CONCAT("Error: too few old rows found: ", COUNT(*))) > + FROM mysql.gtid_slave_pos; > +SET GLOBAL gtid_cleanup_batch_size=1; > > > --echo *** Test @@skip_parallel_replication. *** > @@ -557,25 +566,18 @@ DROP TABLE t1, t2, t3; > > --connection server_2 > --source include/sync_with_master_gtid.inc > -# Check for left-over rows in table mysql.gtid_slave_pos (MDEV-12147). > -# > -# There was a bug when a transaction got a conflict and was rolled back. It > -# might have also handled deletion of some old rows, and these deletions would > -# then also be rolled back. And since the deletes were never re-tried, old no > -# longer needed rows would accumulate in the table without limit. > -# > -# The earlier part of this test file have plenty of transactions being rolled > -# back. But the last DROP TABLE statement runs on its own and should never > -# conflict, thus at this point the mysql.gtid_slave_pos table should be clean. > -# > -# To support @@gtid_pos_auto_engines, when a row is inserted in the table, it > -# is associated with the engine of the table at insertion time, and it will > -# only be deleted during record_gtid from a table of the same engine. Since we > -# alter the table from MyISAM to InnoDB at the start of this test, we should > -# end up with 4 rows: two left-over from when the table was MyISAM, and two > -# left-over from the InnoDB part. > ---echo Check that no more than the expected last four GTIDs are in mysql.gtid_slave_pos > -select count(4) <= 4 from mysql.gtid_slave_pos order by domain_id, sub_id; > +# Check that old rows are deleted from mysql.gtid_slave_pos. > +# Deletion is asynchronous, so use wait_condition.inc. > +# Also, there is a small amount of non-determinism in the deletion of old > +# rows, so it is not guaranteed that there can never be more than > +# @@gtid_cleanup_batch_size rows in the table; so allow a bit of slack > +# here. > +let $wait_condition= > + SELECT COUNT(*) <= 5*@@GLOBAL.gtid_cleanup_batch_size > + FROM mysql.gtid_slave_pos; > +--source include/wait_condition.inc > +eval $wait_condition; > +SET GLOBAL gtid_cleanup_batch_size= @old_gtid_cleanup_batch_size; > > --connection server_1 > --source include/rpl_end.inc > diff --git a/mysql-test/suite/sys_vars/r/sysvars_server_notembedded.result b/mysql-test/suite/sys_vars/r/sysvars_server_notembedded.result > index e8e4d671eb9..5c5ca8b66b2 100644 > --- a/mysql-test/suite/sys_vars/r/sysvars_server_notembedded.result > +++ b/mysql-test/suite/sys_vars/r/sysvars_server_notembedded.result > @@ -1202,6 +1202,20 @@ NUMERIC_BLOCK_SIZE NULL > ENUM_VALUE_LIST NULL > READ_ONLY NO > COMMAND_LINE_ARGUMENT NULL > +VARIABLE_NAME GTID_CLEANUP_BATCH_SIZE > +SESSION_VALUE NULL > +GLOBAL_VALUE 64 > +GLOBAL_VALUE_ORIGIN COMPILE-TIME > +DEFAULT_VALUE 64 > +VARIABLE_SCOPE GLOBAL > +VARIABLE_TYPE INT UNSIGNED > +VARIABLE_COMMENT Normally does not need tuning. How many old rows must accumulate in the mysql.gtid_slave_pos table before a background job will be run to delete them. Can be increased to reduce number of commits if using many different engines with --gtid_pos_auto_engines, or to reduce CPU overhead if using a huge number of different gtid_domain_ids. Can be decreased to reduce number of old rows in the table. > +NUMERIC_MIN_VALUE 0 > +NUMERIC_MAX_VALUE 2147483647 > +NUMERIC_BLOCK_SIZE 1 > +ENUM_VALUE_LIST NULL > +READ_ONLY NO > +COMMAND_LINE_ARGUMENT REQUIRED > VARIABLE_NAME GTID_CURRENT_POS > SESSION_VALUE NULL > GLOBAL_VALUE > diff --git a/sql/log_event.cc b/sql/log_event.cc > index 8813d20578e..e10480fb015 100644 > --- a/sql/log_event.cc > +++ b/sql/log_event.cc > @@ -5565,7 +5565,7 @@ int Query_log_event::do_apply_event(rpl_group_info *rgi, > gtid= rgi->current_gtid; > if (unlikely(rpl_global_gtid_slave_state->record_gtid(thd, &gtid, > sub_id, > - rgi, false, > + true, false, > &hton))) > { > int errcode= thd->get_stmt_da()->sql_errno(); > @@ -8362,7 +8362,7 @@ Gtid_list_log_event::do_apply_event(rpl_group_info *rgi) > { > if ((ret= rpl_global_gtid_slave_state->record_gtid(thd, &list[i], > sub_id_list[i], > - NULL, false, &hton))) > + false, false, &hton))) > return ret; > rpl_global_gtid_slave_state->update_state_hash(sub_id_list[i], &list[i], > hton, NULL); > @@ -8899,7 +8899,7 @@ int Xid_log_event::do_apply_event(rpl_group_info *rgi) > rgi->gtid_pending= false; > > gtid= rgi->current_gtid; > - err= rpl_global_gtid_slave_state->record_gtid(thd, &gtid, sub_id, rgi, > + err= rpl_global_gtid_slave_state->record_gtid(thd, &gtid, sub_id, true, > false, &hton); > if (unlikely(err)) > { > diff --git a/sql/mysqld.cc b/sql/mysqld.cc > index afef4a5f52c..07bdd66f74c 100644 > --- a/sql/mysqld.cc > +++ b/sql/mysqld.cc > @@ -580,6 +580,7 @@ ulong opt_binlog_commit_wait_count= 0; > ulong opt_binlog_commit_wait_usec= 0; > ulong opt_slave_parallel_max_queued= 131072; > my_bool opt_gtid_ignore_duplicates= FALSE; > +uint opt_gtid_cleanup_batch_size= 64; > > const double log_10[] = { > 1e000, 1e001, 1e002, 1e003, 1e004, 1e005, 1e006, 1e007, 1e008, 1e009, > diff --git a/sql/mysqld.h b/sql/mysqld.h > index d5cabd790b2..261748372f9 100644 > --- a/sql/mysqld.h > +++ b/sql/mysqld.h > @@ -258,6 +258,7 @@ extern ulong opt_slave_parallel_mode; > extern ulong opt_binlog_commit_wait_count; > extern ulong opt_binlog_commit_wait_usec; > extern my_bool opt_gtid_ignore_duplicates; > +extern uint opt_gtid_cleanup_batch_size; > extern ulong back_log; > extern ulong executed_events; > extern char language[FN_REFLEN]; > diff --git a/sql/rpl_gtid.cc b/sql/rpl_gtid.cc > index fabd09adaa7..196c2fe3d16 100644 > --- a/sql/rpl_gtid.cc > +++ b/sql/rpl_gtid.cc > @@ -79,7 +79,7 @@ rpl_slave_state::record_and_update_gtid(THD *thd, rpl_group_info *rgi) > rgi->gtid_pending= false; > if (rgi->gtid_ignore_duplicate_state!=rpl_group_info::GTID_DUPLICATE_IGNORE) > { > - if (record_gtid(thd, &rgi->current_gtid, sub_id, NULL, false, &hton)) > + if (record_gtid(thd, &rgi->current_gtid, sub_id, false, false, &hton)) > DBUG_RETURN(1); > update_state_hash(sub_id, &rgi->current_gtid, hton, rgi); > } > @@ -244,7 +244,7 @@ rpl_slave_state_free_element(void *arg) > > > rpl_slave_state::rpl_slave_state() > - : last_sub_id(0), gtid_pos_tables(0), loaded(false) > + : pending_gtid_count(0), last_sub_id(0), gtid_pos_tables(0), loaded(false) > { > mysql_mutex_init(key_LOCK_slave_state, &LOCK_slave_state, > MY_MUTEX_INIT_SLOW); > @@ -331,14 +331,11 @@ rpl_slave_state::update(uint32 domain_id, uint32 server_id, uint64 sub_id, > } > } > rgi->gtid_ignore_duplicate_state= rpl_group_info::GTID_DUPLICATE_NULL; > - > -#ifdef HAVE_REPLICATION > - rgi->pending_gtid_deletes_clear(); > -#endif > } > > if (!(list_elem= (list_element *)my_malloc(sizeof(*list_elem), MYF(MY_WME)))) > return 1; > + list_elem->domain_id= domain_id; > list_elem->server_id= server_id; > list_elem->sub_id= sub_id; > list_elem->seq_no= seq_no; > @@ -348,6 +345,15 @@ rpl_slave_state::update(uint32 domain_id, uint32 server_id, uint64 sub_id, > if (last_sub_id < sub_id) > last_sub_id= sub_id; > > +#ifdef HAVE_REPLICATION > + ++pending_gtid_count; > + if (pending_gtid_count >= opt_gtid_cleanup_batch_size) > + { > + pending_gtid_count = 0; > + slave_background_gtid_pending_delete_request(); > + } > +#endif > + > return 0; > } > > @@ -382,20 +388,22 @@ rpl_slave_state::get_element(uint32 domain_id) > > > int > -rpl_slave_state::put_back_list(uint32 domain_id, list_element *list) > +rpl_slave_state::put_back_list(list_element *list) > { > - element *e; > + element *e= NULL; > int err= 0; > > mysql_mutex_lock(&LOCK_slave_state); > - if (!(e= (element *)my_hash_search(&hash, (const uchar *)&domain_id, 0))) > - { > - err= 1; > - goto end; > - } > while (list) > { > list_element *next= list->next; > + > + if ((!e || e->domain_id != list->domain_id) && > + !(e= (element *)my_hash_search(&hash, (const uchar *)&list->domain_id, 0))) > + { > + err= 1; > + goto end; > + } > e->add(list); > list= next; > } > @@ -572,12 +580,12 @@ rpl_slave_state::select_gtid_pos_table(THD *thd, LEX_CSTRING *out_tablename) > /* > Write a gtid to the replication slave state table. > > + Do it as part of the transaction, to get slave crash safety, or as a separate > + transaction if !in_transaction (eg. MyISAM or DDL). > + > gtid The global transaction id for this event group. > sub_id Value allocated within the sub_id when the event group was > read (sub_id must be consistent with commit order in master binlog). > - rgi rpl_group_info context, if we are recording the gtid transactionally > - as part of replicating a transactional event. NULL if called from > - outside of a replicated transaction. > > Note that caller must later ensure that the new gtid and sub_id is inserted > into the appropriate HASH element with rpl_slave_state.add(), so that it can > @@ -585,16 +593,13 @@ rpl_slave_state::select_gtid_pos_table(THD *thd, LEX_CSTRING *out_tablename) > */ > int > rpl_slave_state::record_gtid(THD *thd, const rpl_gtid *gtid, uint64 sub_id, > - rpl_group_info *rgi, bool in_statement, > + bool in_transaction, bool in_statement, > void **out_hton) > { > TABLE_LIST tlist; > int err= 0, not_sql_thread; > bool table_opened= false; > TABLE *table; > - list_element *delete_list= 0, *next, *cur, **next_ptr_ptr, **best_ptr_ptr; > - uint64 best_sub_id; > - element *elem; > ulonglong thd_saved_option= thd->variables.option_bits; > Query_tables_list lex_backup; > wait_for_commit* suspended_wfc; > @@ -684,7 +689,7 @@ rpl_slave_state::record_gtid(THD *thd, const rpl_gtid *gtid, uint64 sub_id, > thd->wsrep_ignore_table= true; > #endif > > - if (!rgi) > + if (!in_transaction) > { > DBUG_PRINT("info", ("resetting OPTION_BEGIN")); > thd->variables.option_bits&= > @@ -716,168 +721,280 @@ rpl_slave_state::record_gtid(THD *thd, const rpl_gtid *gtid, uint64 sub_id, > my_error(ER_OUT_OF_RESOURCES, MYF(0)); > goto end; > } > +end: > > - mysql_mutex_lock(&LOCK_slave_state); > - if ((elem= get_element(gtid->domain_id)) == NULL) > +#ifdef WITH_WSREP > + thd->wsrep_ignore_table= false; > +#endif > + > + if (table_opened) > { > - mysql_mutex_unlock(&LOCK_slave_state); > - my_error(ER_OUT_OF_RESOURCES, MYF(0)); > - err= 1; > - goto end; > + if (err || (err= ha_commit_trans(thd, FALSE))) > + ha_rollback_trans(thd, FALSE); > + > + close_thread_tables(thd); > + if (in_transaction) > + thd->mdl_context.release_statement_locks(); > + else > + thd->mdl_context.release_transactional_locks(); > } > + thd->lex->restore_backup_query_tables_list(&lex_backup); > + thd->variables.option_bits= thd_saved_option; > + thd->resume_subsequent_commits(suspended_wfc); > + DBUG_EXECUTE_IF("inject_record_gtid_serverid_100_sleep", > + { > + if (gtid->server_id == 100) > + my_sleep(500000); > + }); > + DBUG_RETURN(err); > +} > > - /* Now pull out all GTIDs that were recorded in this engine. */ > - delete_list = NULL; > - next_ptr_ptr= &elem->list; > - cur= elem->list; > - best_sub_id= 0; > - best_ptr_ptr= NULL; > - while (cur) > + > +/* > + Return a list of all old GTIDs in any mysql.gtid_slave_pos* table that are > + no longer needed and can be deleted from the table. > + > + Within each domain, we need to keep around the latest GTID (the one with the > + highest sub_id), but any others in that domain can be deleted. > +*/ > +rpl_slave_state::list_element * > +rpl_slave_state::gtid_grab_pending_delete_list() > +{ > + uint32 i; > + list_element *full_list; > + > + mysql_mutex_lock(&LOCK_slave_state); > + full_list= NULL; > + for (i= 0; i < hash.records; ++i) > { > - list_element *next= cur->next; > - if (cur->hton == hton) > - { > - /* Belongs to same engine, so move it to the delete list. */ > - cur->next= delete_list; > - delete_list= cur; > - if (cur->sub_id > best_sub_id) > + element *elem= (element *)my_hash_element(&hash, i); > + list_element *elist= elem->list; > + list_element *last_elem, **best_ptr_ptr, *cur, *next; > + uint64 best_sub_id; > + > + if (!elist) > + continue; /* Nothing here */ > + > + /* Delete any old stuff, but keep around the most recent one. */ > + cur= elist; > + best_sub_id= cur->sub_id; > + best_ptr_ptr= &elist; > + last_elem= cur; > + while ((next= cur->next)) { > + last_elem= next; > + if (next->sub_id > best_sub_id) > { > - best_sub_id= cur->sub_id; > - best_ptr_ptr= &delete_list; > - } > - else if (best_ptr_ptr == &delete_list) > + best_sub_id= next->sub_id; > best_ptr_ptr= &cur->next; > - } > - else > - { > - /* Another engine, leave it in the list. */ > - if (cur->sub_id > best_sub_id) > - { > - best_sub_id= cur->sub_id; > - /* Current best is not on the delete list. */ > - best_ptr_ptr= NULL; > } > - *next_ptr_ptr= cur; > - next_ptr_ptr= &cur->next; > + cur= next; > } > - cur= next; > - } > - *next_ptr_ptr= NULL; > - /* > - If the highest sub_id element is on the delete list, put it back on the > - original list, to preserve the highest sub_id element in the table for > - GTID position recovery. > - */ > - if (best_ptr_ptr) > - { > + /* > + Append the new elements to the full list. Note the order is important; > + we do it here so that we do not break the list if best_sub_id is the > + last of the new elements. > + */ > + last_elem->next= full_list; > + /* > + Delete the highest sub_id element from the old list, and put it back as > + the single-element new list. > + */ > cur= *best_ptr_ptr; > *best_ptr_ptr= cur->next; > - cur->next= elem->list; > + cur->next= NULL; > elem->list= cur; > + > + /* > + Collect the full list so far here. Note that elist may have moved if we > + deleted the first element, so order is again important. > + */ > + full_list= elist; > } > mysql_mutex_unlock(&LOCK_slave_state); > > - if (!delete_list) > - goto end; > + return full_list; > +} > + > > - /* Now delete any already committed GTIDs. */ > - bitmap_set_bit(table->read_set, table->field[0]->field_index); > - bitmap_set_bit(table->read_set, table->field[1]->field_index); > +/* Find the mysql.gtid_slave_posXXX table associated with a given hton. */ > +LEX_CSTRING * > +rpl_slave_state::select_gtid_pos_table(void *hton) > +{ > + struct gtid_pos_table *table_entry; > > - if ((err= table->file->ha_index_init(0, 0))) > + /* > + See comments on rpl_slave_state::gtid_pos_tables for rules around proper > + access to the list. > + */ > + table_entry= (struct gtid_pos_table *) > + my_atomic_loadptr_explicit(&gtid_pos_tables, MY_MEMORY_ORDER_ACQUIRE); > + > + while (table_entry) > { > - table->file->print_error(err, MYF(0)); > - goto end; > + if (table_entry->table_hton == hton) > + { > + if (likely(table_entry->state == GTID_POS_AVAILABLE)) > + return &table_entry->table_name; > + } > + table_entry= table_entry->next; > } > - cur = delete_list; > - while (cur) > - { > - uchar key_buffer[4+8]; > > - DBUG_EXECUTE_IF("gtid_slave_pos_simulate_failed_delete", > - { err= ENOENT; > - table->file->print_error(err, MYF(0)); > - /* `break' does not work inside DBUG_EXECUTE_IF */ > - goto dbug_break; }); > + table_entry= (struct gtid_pos_table *) > + my_atomic_loadptr_explicit(&default_gtid_pos_table, MY_MEMORY_ORDER_ACQUIRE); > + return &table_entry->table_name; > +} > > - next= cur->next; > > - table->field[1]->store(cur->sub_id, true); > - /* domain_id is already set in table->record[0] from write_row() above. */ > - key_copy(key_buffer, table->record[0], &table->key_info[0], 0, false); > - if (table->file->ha_index_read_map(table->record[1], key_buffer, > - HA_WHOLE_KEY, HA_READ_KEY_EXACT)) > - /* We cannot find the row, assume it is already deleted. */ > - ; > - else if ((err= table->file->ha_delete_row(table->record[1]))) > - table->file->print_error(err, MYF(0)); > - /* > - In case of error, we still discard the element from the list. We do > - not want to endlessly error on the same element in case of table > - corruption or such. > - */ > - cur= next; > - if (err) > - break; > - } > -IF_DBUG(dbug_break:, ) > - table->file->ha_index_end(); > +void > +rpl_slave_state::gtid_delete_pending(THD *thd, > + rpl_slave_state::list_element **list_ptr) > +{ > + int err= 0; > + ulonglong thd_saved_option; > > -end: > + if (unlikely(!loaded)) > + return; > > #ifdef WITH_WSREP > - thd->wsrep_ignore_table= false; > + /* > + Updates in slave state table should not be appended to galera transaction > + writeset. > + */ > + thd->wsrep_ignore_table= true; > #endif > > - if (table_opened) > + thd_saved_option= thd->variables.option_bits; > + thd->variables.option_bits&= > + ~(ulonglong)(OPTION_NOT_AUTOCOMMIT |OPTION_BEGIN |OPTION_BIN_LOG | > + OPTION_GTID_BEGIN); > + > + while (*list_ptr) > { > - if (err || (err= ha_commit_trans(thd, FALSE))) > - { > - /* > - If error, we need to put any remaining delete_list back into the HASH > - so we can do another delete attempt later. > - */ > - if (delete_list) > - { > - put_back_list(gtid->domain_id, delete_list); > - delete_list = 0; > - } > + LEX_CSTRING *gtid_pos_table_name, *tmp_table_name; > + Query_tables_list lex_backup; > + TABLE_LIST tlist; > + TABLE *table; > + handler::Table_flags direct_pos; > + list_element *cur, **cur_ptr_ptr; > + bool table_opened= false; > + void *hton= (*list_ptr)->hton; > > - ha_rollback_trans(thd, FALSE); > + thd->reset_for_next_command(); > + > + /* > + Only the SQL thread can call select_gtid_pos_table without a mutex > + Other threads needs to use a mutex and take into account that the > + result may change during execution, so we have to make a copy. > + */ > + mysql_mutex_lock(&LOCK_slave_state); > + tmp_table_name= select_gtid_pos_table(hton); > + gtid_pos_table_name= thd->make_clex_string(tmp_table_name->str, > + tmp_table_name->length); > + mysql_mutex_unlock(&LOCK_slave_state); > + if (!gtid_pos_table_name) > + { > + /* Out of memory - we can try again later. */ > + break; > } > - close_thread_tables(thd); > - if (rgi) > + > + thd->lex->reset_n_backup_query_tables_list(&lex_backup); > + tlist.init_one_table(&MYSQL_SCHEMA_NAME, gtid_pos_table_name, NULL, TL_WRITE); > + if ((err= open_and_lock_tables(thd, &tlist, FALSE, 0))) > + goto end; > + table_opened= true; > + table= tlist.table; > + > + if ((err= gtid_check_rpl_slave_state_table(table))) > + goto end; > + > + direct_pos= table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION; > + bitmap_set_all(table->write_set); > + table->rpl_write_set= table->write_set; > + > + /* Now delete any already committed GTIDs. */ > + bitmap_set_bit(table->read_set, table->field[0]->field_index); > + bitmap_set_bit(table->read_set, table->field[1]->field_index); > + > + if (!direct_pos && (err= table->file->ha_index_init(0, 0))) > { > - thd->mdl_context.release_statement_locks(); > - /* > - Save the list of old gtid entries we deleted. If this transaction > - fails later for some reason and is rolled back, the deletion of those > - entries will be rolled back as well, and we will need to put them back > - on the to-be-deleted list so we can re-do the deletion. Otherwise > - redundant rows in mysql.gtid_slave_pos may accumulate if transactions > - are rolled back and retried after record_gtid(). > - */ > -#ifdef HAVE_REPLICATION > - rgi->pending_gtid_deletes_save(gtid->domain_id, delete_list); > -#endif > + table->file->print_error(err, MYF(0)); > + goto end; > } > - else > + > + cur = *list_ptr; > + cur_ptr_ptr = list_ptr; > + do > { > - thd->mdl_context.release_transactional_locks(); > -#ifdef HAVE_REPLICATION > - rpl_group_info::pending_gtid_deletes_free(delete_list); > -#endif > + uchar key_buffer[4+8]; > + list_element *next= cur->next; > + > + if (cur->hton == hton) > + { > + int res; > + > + table->field[0]->store((ulonglong)cur->domain_id, true); > + table->field[1]->store(cur->sub_id, true); > + if (direct_pos) > + { > + res= table->file->ha_rnd_pos_by_record(table->record[0]); > + } > + else > + { > + key_copy(key_buffer, table->record[0], &table->key_info[0], 0, false); > + res= table->file->ha_index_read_map(table->record[0], key_buffer, > + HA_WHOLE_KEY, HA_READ_KEY_EXACT); > + } > + DBUG_EXECUTE_IF("gtid_slave_pos_simulate_failed_delete", > + { res= 1; > + err= ENOENT; > + sql_print_error("<DEBUG> Error deleting old GTID row"); > + }); > + if (res) > + /* We cannot find the row, assume it is already deleted. */ > + ; > + else if ((err= table->file->ha_delete_row(table->record[0]))) > + { > + sql_print_error("Error deleting old GTID row: %s", > + thd->get_stmt_da()->message()); > + /* > + In case of error, we still discard the element from the list. We do > + not want to endlessly error on the same element in case of table > + corruption or such. > + */ > + } > + *cur_ptr_ptr= next; > + my_free(cur); > + } > + else > + { > + /* Leave this one in the list until we get to the table for its hton. */ > + cur_ptr_ptr= &cur->next; > + } > + cur= next; > + if (err) > + break; > + } while (cur); > +end: > + if (table_opened) > + { > + if (!direct_pos) > + table->file->ha_index_end(); > + > + if (err || (err= ha_commit_trans(thd, FALSE))) > + ha_rollback_trans(thd, FALSE); > } > + close_thread_tables(thd); > + thd->mdl_context.release_transactional_locks(); > + thd->lex->restore_backup_query_tables_list(&lex_backup); > + > + if (err) > + break; > } > - thd->lex->restore_backup_query_tables_list(&lex_backup); > thd->variables.option_bits= thd_saved_option; > - thd->resume_subsequent_commits(suspended_wfc); > - DBUG_EXECUTE_IF("inject_record_gtid_serverid_100_sleep", > - { > - if (gtid->server_id == 100) > - my_sleep(500000); > - }); > - DBUG_RETURN(err); > + > +#ifdef WITH_WSREP > + thd->wsrep_ignore_table= false; > +#endif > } > > > @@ -1251,7 +1368,7 @@ rpl_slave_state::load(THD *thd, const char *state_from_master, size_t len, > > if (gtid_parser_helper(&state_from_master, end, &gtid) || > !(sub_id= next_sub_id(gtid.domain_id)) || > - record_gtid(thd, &gtid, sub_id, NULL, in_statement, &hton) || > + record_gtid(thd, &gtid, sub_id, false, in_statement, &hton) || > update(gtid.domain_id, gtid.server_id, sub_id, gtid.seq_no, hton, NULL)) > return 1; > if (state_from_master == end) > diff --git a/sql/rpl_gtid.h b/sql/rpl_gtid.h > index 0fc92d5e33c..60d822f7b0d 100644 > --- a/sql/rpl_gtid.h > +++ b/sql/rpl_gtid.h > @@ -118,8 +118,9 @@ struct rpl_slave_state > { > struct list_element *next; > uint64 sub_id; > - uint64 seq_no; > + uint32 domain_id; > uint32 server_id; > + uint64 seq_no; > /* > hton of mysql.gtid_slave_pos* table used to record this GTID. > Can be NULL if the gtid table failed to load (eg. missing > @@ -191,6 +192,8 @@ struct rpl_slave_state > > /* Mapping from domain_id to its element. */ > HASH hash; > + /* GTIDs added since last purge of old mysql.gtid_slave_pos rows. */ > + uint32 pending_gtid_count; > /* Mutex protecting access to the state. */ > mysql_mutex_t LOCK_slave_state; > /* Auxiliary buffer to sort gtid list. */ > @@ -233,7 +236,10 @@ struct rpl_slave_state > int truncate_state_table(THD *thd); > void select_gtid_pos_table(THD *thd, LEX_CSTRING *out_tablename); > int record_gtid(THD *thd, const rpl_gtid *gtid, uint64 sub_id, > - rpl_group_info *rgi, bool in_statement, void **out_hton); > + bool in_transaction, bool in_statement, void **out_hton); > + list_element *gtid_grab_pending_delete_list(); > + LEX_CSTRING *select_gtid_pos_table(void *hton); > + void gtid_delete_pending(THD *thd, rpl_slave_state::list_element **list_ptr); > uint64 next_sub_id(uint32 domain_id); > int iterate(int (*cb)(rpl_gtid *, void *), void *data, > rpl_gtid *extra_gtids, uint32 num_extra, > @@ -245,7 +251,7 @@ struct rpl_slave_state > bool is_empty(); > > element *get_element(uint32 domain_id); > - int put_back_list(uint32 domain_id, list_element *list); > + int put_back_list(list_element *list); > > void update_state_hash(uint64 sub_id, rpl_gtid *gtid, void *hton, > rpl_group_info *rgi); > diff --git a/sql/rpl_rli.cc b/sql/rpl_rli.cc > index b275ad884bd..2d91620c898 100644 > --- a/sql/rpl_rli.cc > +++ b/sql/rpl_rli.cc > @@ -1820,6 +1820,7 @@ rpl_load_gtid_slave_state(THD *thd) > int err= 0; > uint32 i; > load_gtid_state_cb_data cb_data; > + rpl_slave_state::list_element *old_gtids_list; > DBUG_ENTER("rpl_load_gtid_slave_state"); > > mysql_mutex_lock(&rpl_global_gtid_slave_state->LOCK_slave_state); > @@ -1905,6 +1906,13 @@ rpl_load_gtid_slave_state(THD *thd) > rpl_global_gtid_slave_state->loaded= true; > mysql_mutex_unlock(&rpl_global_gtid_slave_state->LOCK_slave_state); > > + /* Clear out no longer needed elements now. */ > + old_gtids_list= > + rpl_global_gtid_slave_state->gtid_grab_pending_delete_list(); > + rpl_global_gtid_slave_state->gtid_delete_pending(thd, &old_gtids_list); > + if (old_gtids_list) > + rpl_global_gtid_slave_state->put_back_list(old_gtids_list); > + > end: > if (array_inited) > delete_dynamic(&array); > @@ -2086,7 +2094,6 @@ rpl_group_info::reinit(Relay_log_info *rli) > long_find_row_note_printed= false; > did_mark_start_commit= false; > gtid_ev_flags2= 0; > - pending_gtid_delete_list= NULL; > last_master_timestamp = 0; > gtid_ignore_duplicate_state= GTID_DUPLICATE_NULL; > speculation= SPECULATE_NO; > @@ -2217,12 +2224,6 @@ void rpl_group_info::cleanup_context(THD *thd, bool error) > erroneously update the GTID position. > */ > gtid_pending= false; > - > - /* > - Rollback will have undone any deletions of old rows we might have made > - in mysql.gtid_slave_pos. Put those rows back on the list to be deleted. > - */ > - pending_gtid_deletes_put_back(); > } > m_table_map.clear_tables(); > slave_close_thread_tables(thd); > @@ -2448,78 +2449,6 @@ rpl_group_info::unmark_start_commit() > } > > > -/* > - When record_gtid() has deleted any old rows from the table > - mysql.gtid_slave_pos as part of a replicated transaction, save the list of > - rows deleted here. > - > - If later the transaction fails (eg. optimistic parallel replication), the > - deletes will be undone when the transaction is rolled back. Then we can > - put back the list of rows into the rpl_global_gtid_slave_state, so that > - we can re-do the deletes and avoid accumulating old rows in the table. > -*/ > -void > -rpl_group_info::pending_gtid_deletes_save(uint32 domain_id, > - rpl_slave_state::list_element *list) > -{ > - /* > - We should never get to a state where we try to save a new pending list of > - gtid deletes while we still have an old one. But make sure we handle it > - anyway just in case, so we avoid leaving stray entries in the > - mysql.gtid_slave_pos table. > - */ > - DBUG_ASSERT(!pending_gtid_delete_list); > - if (unlikely(pending_gtid_delete_list)) > - pending_gtid_deletes_put_back(); > - > - pending_gtid_delete_list= list; > - pending_gtid_delete_list_domain= domain_id; > -} > - > - > -/* > - Take the list recorded by pending_gtid_deletes_save() and put it back into > - rpl_global_gtid_slave_state. This is needed if deletion of the rows was > - rolled back due to transaction failure. > -*/ > -void > -rpl_group_info::pending_gtid_deletes_put_back() > -{ > - if (pending_gtid_delete_list) > - { > - rpl_global_gtid_slave_state->put_back_list(pending_gtid_delete_list_domain, > - pending_gtid_delete_list); > - pending_gtid_delete_list= NULL; > - } > -} > - > - > -/* > - Free the list recorded by pending_gtid_deletes_save(). Done when the deletes > - in the list have been permanently committed. > -*/ > -void > -rpl_group_info::pending_gtid_deletes_clear() > -{ > - pending_gtid_deletes_free(pending_gtid_delete_list); > - pending_gtid_delete_list= NULL; > -} > - > - > -void > -rpl_group_info::pending_gtid_deletes_free(rpl_slave_state::list_element *list) > -{ > - rpl_slave_state::list_element *next; > - > - while (list) > - { > - next= list->next; > - my_free(list); > - list= next; > - } > -} > - > - > rpl_sql_thread_info::rpl_sql_thread_info(Rpl_filter *filter) > : rpl_filter(filter) > { > diff --git a/sql/rpl_rli.h b/sql/rpl_rli.h > index d9f0e0e5d3b..b8b153c34be 100644 > --- a/sql/rpl_rli.h > +++ b/sql/rpl_rli.h > @@ -757,11 +757,6 @@ struct rpl_group_info > /* Needs room for "Gtid D-S-N\x00". */ > char gtid_info_buf[5+10+1+10+1+20+1]; > > - /* List of not yet committed deletions in mysql.gtid_slave_pos. */ > - rpl_slave_state::list_element *pending_gtid_delete_list; > - /* Domain associated with pending_gtid_delete_list. */ > - uint32 pending_gtid_delete_list_domain; > - > /* > The timestamp, from the master, of the commit event. > Used to do delayed update of rli->last_master_timestamp, for getting > @@ -903,12 +898,6 @@ struct rpl_group_info > char *gtid_info(); > void unmark_start_commit(); > > - static void pending_gtid_deletes_free(rpl_slave_state::list_element *list); > - void pending_gtid_deletes_save(uint32 domain_id, > - rpl_slave_state::list_element *list); > - void pending_gtid_deletes_put_back(); > - void pending_gtid_deletes_clear(); > - > longlong get_row_stmt_start_timestamp() > { > return row_stmt_start_timestamp; > diff --git a/sql/slave.cc b/sql/slave.cc > index bb1300d36e6..f8499513dd6 100644 > --- a/sql/slave.cc > +++ b/sql/slave.cc > @@ -465,6 +465,8 @@ static struct slave_background_gtid_pos_create_t { > void *hton; > } *slave_background_gtid_pos_create_list; > > +static volatile bool slave_background_gtid_pending_delete_flag; > + > > pthread_handler_t > handle_slave_background(void *arg __attribute__((unused))) > @@ -499,6 +501,7 @@ handle_slave_background(void *arg __attribute__((unused))) > { > slave_background_kill_t *kill_list; > slave_background_gtid_pos_create_t *create_list; > + bool pending_deletes; > > thd->ENTER_COND(&COND_slave_background, &LOCK_slave_background, > &stage_slave_background_wait_request, > @@ -508,13 +511,15 @@ handle_slave_background(void *arg __attribute__((unused))) > stop= abort_loop || thd->killed || slave_background_thread_stop; > kill_list= slave_background_kill_list; > create_list= slave_background_gtid_pos_create_list; > - if (stop || kill_list || create_list) > + pending_deletes= slave_background_gtid_pending_delete_flag; > + if (stop || kill_list || create_list || pending_deletes) > break; > mysql_cond_wait(&COND_slave_background, &LOCK_slave_background); > } > > slave_background_kill_list= NULL; > slave_background_gtid_pos_create_list= NULL; > + slave_background_gtid_pending_delete_flag= false; > thd->EXIT_COND(&old_stage); > > while (kill_list) > @@ -541,6 +546,17 @@ handle_slave_background(void *arg __attribute__((unused))) > create_list= next; > } > > + if (pending_deletes) > + { > + rpl_slave_state::list_element *list; > + > + slave_background_gtid_pending_delete_flag= false; > + list= rpl_global_gtid_slave_state->gtid_grab_pending_delete_list(); > + rpl_global_gtid_slave_state->gtid_delete_pending(thd, &list); > + if (list) > + rpl_global_gtid_slave_state->put_back_list(list); > + } > + > mysql_mutex_lock(&LOCK_slave_background); > } while (!stop); > > @@ -615,6 +631,23 @@ slave_background_gtid_pos_create_request( > > > /* > + Request the slave background thread to delete no longer used rows from the > + mysql.gtid_slave_pos* tables. > + > + This is called from time-critical rpl_slave_state::update(), so we avoid > + taking any locks here. This means we may race with the background thread > + to occasionally lose a signal. This is not a problem; any pending rows to > + be deleted will just be deleted a bit later as part of the next batch. > +*/ > +void > +slave_background_gtid_pending_delete_request(void) > +{ > + slave_background_gtid_pending_delete_flag= true; > + mysql_cond_signal(&COND_slave_background); > +} > + > + > +/* > Start the slave background thread. > > This thread is currently used for two purposes: > diff --git a/sql/slave.h b/sql/slave.h > index 649d55b45b9..12d569b0333 100644 > --- a/sql/slave.h > +++ b/sql/slave.h > @@ -276,6 +276,7 @@ bool net_request_file(NET* net, const char* fname); > void slave_background_kill_request(THD *to_kill); > void slave_background_gtid_pos_create_request > (rpl_slave_state::gtid_pos_table *table_entry); > +void slave_background_gtid_pending_delete_request(void); > > extern bool volatile abort_loop; > extern Master_info *active_mi; /* active_mi for multi-master */ > diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc > index 6d4c135683a..9348f4e5c98 100644 > --- a/sql/sys_vars.cc > +++ b/sql/sys_vars.cc > @@ -1942,6 +1942,19 @@ Sys_var_last_gtid::session_value_ptr(THD *thd, const LEX_CSTRING *base) > } > > > +static Sys_var_uint Sys_gtid_cleanup_batch_size( > + "gtid_cleanup_batch_size", > + "Normally does not need tuning. How many old rows must accumulate in " > + "the mysql.gtid_slave_pos table before a background job will be run to " > + "delete them. Can be increased to reduce number of commits if " > + "using many different engines with --gtid_pos_auto_engines, or to " > + "reduce CPU overhead if using a huge number of different " > + "gtid_domain_ids. Can be decreased to reduce number of old rows in the " > + "table.", > + GLOBAL_VAR(opt_gtid_cleanup_batch_size), CMD_LINE(REQUIRED_ARG), > + VALID_RANGE(0,2147483647), DEFAULT(64), BLOCK_SIZE(1)); > + > + > static bool > check_slave_parallel_threads(sys_var *self, THD *thd, set_var *var) > { > diff --git a/storage/rocksdb/mysql-test/rocksdb_rpl/r/mdev12179.result b/storage/rocksdb/mysql-test/rocksdb_rpl/r/mdev12179.result > index 9c20fea97ae..a1e501f78f4 100644 > --- a/storage/rocksdb/mysql-test/rocksdb_rpl/r/mdev12179.result > +++ b/storage/rocksdb/mysql-test/rocksdb_rpl/r/mdev12179.result > @@ -2,6 +2,7 @@ include/master-slave.inc > [connection master] > connection server_2; > include/stop_slave.inc > +SET GLOBAL gtid_cleanup_batch_size = 999999999; > CHANGE MASTER TO master_use_gtid=slave_pos; > SET sql_log_bin=0; > CREATE TABLE mysql.gtid_slave_pos_innodb LIKE mysql.gtid_slave_pos; > @@ -41,6 +42,8 @@ a > 1 > SELECT * FROM mysql.gtid_slave_pos ORDER BY sub_id; > domain_id sub_id server_id seq_no > +0 1 1 1 > +0 2 1 2 > 0 3 1 3 > 0 4 1 4 > SELECT * FROM ( SELECT * FROM mysql.gtid_slave_pos_innodb > @@ -121,6 +124,21 @@ Transactions_multi_engine 6 > DELETE FROM t1 WHERE a >= 100; > DELETE FROM t2 WHERE a >= 100; > DELETE FROM t3 WHERE a >= 100; > +connection server_1; > +include/save_master_gtid.inc > +connection server_2; > +include/sync_with_master_gtid.inc > +SELECT COUNT(*)>=10 FROM mysql.gtid_slave_pos; > +COUNT(*)>=10 > +1 > +SELECT COUNT(*)>=10 FROM ( SELECT * FROM mysql.gtid_slave_pos_innodb > +UNION ALL SELECT * FROM mysql.gtid_slave_pos_innodb_redundant) inner_select; > +COUNT(*)>=10 > +1 > +SELECT COUNT(*)>=10 FROM mysql.gtid_slave_pos_rocksdb; > +COUNT(*)>=10 > +1 > +SET GLOBAL gtid_cleanup_batch_size = 3; > connection server_2; > include/stop_slave.inc > SET sql_log_bin=0; > diff --git a/storage/rocksdb/mysql-test/rocksdb_rpl/t/mdev12179.test b/storage/rocksdb/mysql-test/rocksdb_rpl/t/mdev12179.test > index e0d16e7f242..631d9ca533f 100644 > --- a/storage/rocksdb/mysql-test/rocksdb_rpl/t/mdev12179.test > +++ b/storage/rocksdb/mysql-test/rocksdb_rpl/t/mdev12179.test > @@ -4,6 +4,12 @@ > > --connection server_2 > --source include/stop_slave.inc > + > +# Set GTID cleanup limit high enough that cleanup will not run and we > +# can rely on consistent table output in .result. > +--let $old_gtid_cleanup_batch_size=`SELECT @@GLOBAL.gtid_cleanup_batch_size` > +SET GLOBAL gtid_cleanup_batch_size = 999999999; > + > CHANGE MASTER TO master_use_gtid=slave_pos; > SET sql_log_bin=0; > CREATE TABLE mysql.gtid_slave_pos_innodb LIKE mysql.gtid_slave_pos; > @@ -89,6 +95,82 @@ DELETE FROM t2 WHERE a >= 100; > DELETE FROM t3 WHERE a >= 100; > > > +# Create a bunch more GTIDs in mysql.gtid_slave_pos* tables to test with. > +--connection server_1 > +--disable_query_log > +let $i=10; > +while ($i) { > + eval INSERT INTO t1 VALUES (300+$i); > + eval INSERT INTO t2 VALUES (300+$i); > + eval INSERT INTO t3 VALUES (300+$i); > + dec $i; > +} > +--enable_query_log > +--source include/save_master_gtid.inc > + > +--connection server_2 > +--source include/sync_with_master_gtid.inc > + > +# Check that we have many rows in mysql.gtid_slave_pos now (since > +# @@gtid_cleanup_batch_size was set to a huge value). No need to check > +# for an exact number, since that will require changing .result if > +# anything changes prior to this point, and we just need to know that > +# we have still have some data in the tables to make the following > +# test effective. > +SELECT COUNT(*)>=10 FROM mysql.gtid_slave_pos; > +SELECT COUNT(*)>=10 FROM ( SELECT * FROM mysql.gtid_slave_pos_innodb > + UNION ALL SELECT * FROM mysql.gtid_slave_pos_innodb_redundant) inner_select; > +SELECT COUNT(*)>=10 FROM mysql.gtid_slave_pos_rocksdb; > + > +# Check that old GTID rows will be deleted when batch delete size is > +# set reasonably. Old row deletion is not 100% deterministic (by design), so > +# we must wait for it to occur, but it should occur eventually. > +SET GLOBAL gtid_cleanup_batch_size = 3; > +let $i=40; > +--disable_query_log > +--let $keep_include_silent=1 > +while ($i) { > + let N=`SELECT 1+($i MOD 3)`; > + --connection server_1 > + eval UPDATE t$N SET a=a+1 WHERE a=(SELECT MAX(a) FROM t$N); > + --source include/save_master_gtid.inc > + --connection server_2 > + --source include/sync_with_master_gtid.inc > + let $j=50; > + while ($j) { > + let $is_done=`SELECT SUM(a)=1 FROM ( > + SELECT COUNT(*) AS a FROM mysql.gtid_slave_pos > + UNION ALL > + SELECT COUNT(*) AS a FROM ( SELECT * FROM mysql.gtid_slave_pos_innodb > + UNION ALL SELECT * FROM mysql.gtid_slave_pos_innodb_redundant) inner_select > + UNION ALL > + SELECT COUNT(*) AS a FROM mysql.gtid_slave_pos_rocksdb) outer_select`; > + if ($is_done) { > + let $j=0; > + } > + if (!$is_done) { > + real_sleep 0.1; > + dec $j; > + } > + } > + dec $i; > + if ($is_done) { > + let $i=0; > + } > +} > +--enable_query_log > +--let $keep_include_silent=0 > +if (!$is_done) { > + --echo Timed out waiting for mysql.gtid_slave_pos* tables to be cleaned up > +} > + > +--disable_query_log > +DELETE FROM t1 WHERE a >= 100; > +DELETE FROM t2 WHERE a >= 100; > +DELETE FROM t3 WHERE a >= 100; > +--enable_query_log > + > + > # Test status variables Rpl_transactions_multi_engine and Transactions_gtid_foreign_engine. > # Have mysql.gtid_slave_pos* for myisam and innodb but not rocksdb. > --connection server_2 > @@ -223,6 +305,9 @@ SHOW STATUS LIKE "%transactions%engine"; > SET sql_log_bin=0; > DROP TABLE mysql.gtid_slave_pos_innodb; > SET sql_log_bin=1; > +--disable_query_log > +eval SET GLOBAL gtid_cleanup_batch_size = $old_gtid_cleanup_batch_size; > +--enable_query_log > > --connection server_1 > DROP TABLE t1; > diff --git a/storage/tokudb/mysql-test/tokudb_rpl/r/mdev12179.result b/storage/tokudb/mysql-test/tokudb_rpl/r/mdev12179.result > index d4532eec4e2..d79e7e59aa4 100644 > --- a/storage/tokudb/mysql-test/tokudb_rpl/r/mdev12179.result > +++ b/storage/tokudb/mysql-test/tokudb_rpl/r/mdev12179.result > @@ -2,6 +2,7 @@ include/master-slave.inc > [connection master] > connection server_2; > include/stop_slave.inc > +SET GLOBAL gtid_cleanup_batch_size = 999999999; > CHANGE MASTER TO master_use_gtid=slave_pos; > SET sql_log_bin=0; > CREATE TABLE mysql.gtid_slave_pos_innodb LIKE mysql.gtid_slave_pos; > @@ -41,6 +42,8 @@ a > 1 > SELECT * FROM mysql.gtid_slave_pos ORDER BY sub_id; > domain_id sub_id server_id seq_no > +0 1 1 1 > +0 2 1 2 > 0 3 1 3 > 0 4 1 4 > SELECT * FROM ( SELECT * FROM mysql.gtid_slave_pos_innodb > @@ -121,6 +124,21 @@ Transactions_multi_engine 6 > DELETE FROM t1 WHERE a >= 100; > DELETE FROM t2 WHERE a >= 100; > DELETE FROM t3 WHERE a >= 100; > +connection server_1; > +include/save_master_gtid.inc > +connection server_2; > +include/sync_with_master_gtid.inc > +SELECT COUNT(*)>=10 FROM mysql.gtid_slave_pos; > +COUNT(*)>=10 > +1 > +SELECT COUNT(*)>=10 FROM ( SELECT * FROM mysql.gtid_slave_pos_innodb > +UNION ALL SELECT * FROM mysql.gtid_slave_pos_innodb_redundant) inner_select; > +COUNT(*)>=10 > +1 > +SELECT COUNT(*)>=10 FROM mysql.gtid_slave_pos_tokudb; > +COUNT(*)>=10 > +1 > +SET GLOBAL gtid_cleanup_batch_size = 3; > connection server_2; > include/stop_slave.inc > SET sql_log_bin=0; > diff --git a/storage/tokudb/mysql-test/tokudb_rpl/t/mdev12179.test b/storage/tokudb/mysql-test/tokudb_rpl/t/mdev12179.test > index ceb119cd0dc..1d19a25889e 100644 > --- a/storage/tokudb/mysql-test/tokudb_rpl/t/mdev12179.test > +++ b/storage/tokudb/mysql-test/tokudb_rpl/t/mdev12179.test > @@ -4,6 +4,12 @@ > > --connection server_2 > --source include/stop_slave.inc > + > +# Set GTID cleanup limit high enough that cleanup will not run and we > +# can rely on consistent table output in .result. > +--let $old_gtid_cleanup_batch_size=`SELECT @@GLOBAL.gtid_cleanup_batch_size` > +SET GLOBAL gtid_cleanup_batch_size = 999999999; > + > CHANGE MASTER TO master_use_gtid=slave_pos; > SET sql_log_bin=0; > CREATE TABLE mysql.gtid_slave_pos_innodb LIKE mysql.gtid_slave_pos; > @@ -89,6 +95,82 @@ DELETE FROM t2 WHERE a >= 100; > DELETE FROM t3 WHERE a >= 100; > > > +# Create a bunch more GTIDs in mysql.gtid_slave_pos* tables to test with. > +--connection server_1 > +--disable_query_log > +let $i=10; > +while ($i) { > + eval INSERT INTO t1 VALUES (300+$i); > + eval INSERT INTO t2 VALUES (300+$i); > + eval INSERT INTO t3 VALUES (300+$i); > + dec $i; > +} > +--enable_query_log > +--source include/save_master_gtid.inc > + > +--connection server_2 > +--source include/sync_with_master_gtid.inc > + > +# Check that we have many rows in mysql.gtid_slave_pos now (since > +# @@gtid_cleanup_batch_size was set to a huge value). No need to check > +# for an exact number, since that will require changing .result if > +# anything changes prior to this point, and we just need to know that > +# we have still have some data in the tables to make the following > +# test effective. > +SELECT COUNT(*)>=10 FROM mysql.gtid_slave_pos; > +SELECT COUNT(*)>=10 FROM ( SELECT * FROM mysql.gtid_slave_pos_innodb > + UNION ALL SELECT * FROM mysql.gtid_slave_pos_innodb_redundant) inner_select; > +SELECT COUNT(*)>=10 FROM mysql.gtid_slave_pos_tokudb; > + > +# Check that old GTID rows will be deleted when batch delete size is > +# set reasonably. Old row deletion is not 100% deterministic (by design), so > +# we must wait for it to occur, but it should occur eventually. > +SET GLOBAL gtid_cleanup_batch_size = 3; > +let $i=40; > +--disable_query_log > +--let $keep_include_silent=1 > +while ($i) { > + let N=`SELECT 1+($i MOD 3)`; > + --connection server_1 > + eval UPDATE t$N SET a=a+1 WHERE a=(SELECT MAX(a) FROM t$N); > + --source include/save_master_gtid.inc > + --connection server_2 > + --source include/sync_with_master_gtid.inc > + let $j=50; > + while ($j) { > + let $is_done=`SELECT SUM(a)=1 FROM ( > + SELECT COUNT(*) AS a FROM mysql.gtid_slave_pos > + UNION ALL > + SELECT COUNT(*) AS a FROM ( SELECT * FROM mysql.gtid_slave_pos_innodb > + UNION ALL SELECT * FROM mysql.gtid_slave_pos_innodb_redundant) inner_select > + UNION ALL > + SELECT COUNT(*) AS a FROM mysql.gtid_slave_pos_tokudb) outer_select`; > + if ($is_done) { > + let $j=0; > + } > + if (!$is_done) { > + real_sleep 0.1; > + dec $j; > + } > + } > + dec $i; > + if ($is_done) { > + let $i=0; > + } > +} > +--enable_query_log > +--let $keep_include_silent=0 > +if (!$is_done) { > + --echo Timed out waiting for mysql.gtid_slave_pos* tables to be cleaned up > +} > + > +--disable_query_log > +DELETE FROM t1 WHERE a >= 100; > +DELETE FROM t2 WHERE a >= 100; > +DELETE FROM t3 WHERE a >= 100; > +--enable_query_log > + > + > # Test status variables Rpl_transactions_multi_engine and Transactions_gtid_foreign_engine. > # Have mysql.gtid_slave_pos* for myisam and innodb but not tokudb. > --connection server_2 > @@ -223,6 +305,9 @@ SHOW STATUS LIKE "%transactions%engine"; > SET sql_log_bin=0; > DROP TABLE mysql.gtid_slave_pos_innodb; > SET sql_log_bin=1; > +--disable_query_log > +eval SET GLOBAL gtid_cleanup_batch_size = $old_gtid_cleanup_batch_size; > +--enable_query_log > > --connection server_1 > DROP TABLE t1; > _______________________________________________ > commits mailing list > commits(a)mariadb.org > https://lists.askmonty.org/cgi-bin/mailman/listinfo/commits

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Re: [Maria-developers] [Commits] 2da93752430: MDEV-17255: New optimizer defaults and ANALYZE TABLE
by Sergey Petrunia 06 Dec '18

06 Dec '18

Hi Varun, Nice to see that most of the input has been addressed. However, the issue of missing test coverage is still not resolved: On Sat, Nov 24, 2018 at 09:47:57PM +0300, Sergey Petrunia wrote: >> Please also add test coverage for this particular MDEV. This should be a >> testcase that shows that >> >> - with PREFERABLY, ANALYZE will collect EITS stats, SELECT will use them. >> >> - with PREFERABLY_FOR_READS : >> -- ANALYZE will not collect EITS stats >> -- ANALYZE .. PERSISTENT FOR ... will update the EITS stats. >> -- SELECT will use them. and now it is still not addressed. I made this change: @@ -104,6 +104,8 @@ Use_stat_tables_mode get_use_stat_tables_mode(THD *thd) inline bool check_eits_collection_allowed(THD *thd) { + if (get_use_stat_tables_mode(thd) == PREFERABLY_FOR_QUERIES) + DBUG_ASSERT(0); return (get_use_stat_tables_mode(thd) == COMPLEMENTARY || get_use_stat_tables_mode(thd) == PREFERABLY); } and the testsuite still passes! On Wed, Dec 05, 2018 at 07:57:06PM +0530, Varun wrote: > revision-id: 2da93752430d0dd07344c9d62f2468bba8962b77 (mariadb-10.3.6-266-g2da93752430) > parent(s): e0739064450f2c2be6d5de1d799582121747dd39 > author: Varun Gupta > committer: Varun Gupta > timestamp: 2018-12-05 19:56:23 +0530 > message: > > MDEV-17255: New optimizer defaults and ANALYZE TABLE > > Added to new values to the server variable use_stat_tables. > The values are COMPLEMENTARY_FOR_QUERIES and PREFERABLY_FOR_QUERIES. > Both these values don't allow to collect EITS for queries like > analyze table t1; > To collect EITS we would need to use the syntax with persistent like > analyze table t1 persistent for columns (col1,col2...) index (idx1, idx2...) / ALL > > Changing the default value from NEVER to PREFERABLY_FOR_QUERIES. > > --- > mysql-test/include/default_mysqld.cnf | 1 + > mysql-test/main/stat_tables.result | 59 +++++++++++++++++++++++++++++++ > mysql-test/main/stat_tables.test | 43 ++++++++++++++++++++++ > mysql-test/main/stat_tables_innodb.result | 59 +++++++++++++++++++++++++++++++ > sql/sql_admin.cc | 2 +- > sql/sql_statistics.cc | 5 ++- > sql/sql_statistics.h | 27 ++++++++++++++ > sql/sys_vars.cc | 5 +-- > 8 files changed, 195 insertions(+), 6 deletions(-) > > diff --git a/mysql-test/include/default_mysqld.cnf b/mysql-test/include/default_mysqld.cnf > index 69a2b58288b..5ba3bdeb92c 100644 > --- a/mysql-test/include/default_mysqld.cnf > +++ b/mysql-test/include/default_mysqld.cnf > @@ -107,6 +107,7 @@ loose-performance-schema-consumer-thread-instrumentation=ON > binlog-direct-non-transactional-updates > > default-storage-engine=myisam > +use-stat-tables=preferably_for_queries > > loose-ssl-ca=(a)ENV.MYSQL_TEST_DIR/std_data/cacert.pem > loose-ssl-cert=(a)ENV.MYSQL_TEST_DIR/std_data/server-cert.pem > diff --git a/mysql-test/main/stat_tables.result b/mysql-test/main/stat_tables.result > index 308529ece47..67bf3f9237d 100644 > --- a/mysql-test/main/stat_tables.result > +++ b/mysql-test/main/stat_tables.result > @@ -605,4 +605,63 @@ SELECT MAX(pk) FROM t1; > MAX(pk) > NULL > DROP TABLE t1; > +# > +# MDEV-17255: New optimizer defaults and ANALYZE TABLE > +# > +set @save_use_stat_tables= @@use_stat_tables; > +create table t1 (a int, b int); > +insert into t1(a,b) values (1,2),(1,3),(1,4),(1,5),(2,6),(2,7),(3,8),(3,9),(3,9),(4,10); > +# > +# with use_stat_tables= PREFERABLY_FOR_QUERIES > +# analyze table t1 will not collect statistics > +# > +analyze table t1; > +Table Op Msg_type Msg_text > +test.t1 analyze status Engine-independent statistics collected > +test.t1 analyze status OK > +select * from mysql.column_stats; > +db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram > +test t1 a 1 4 0.0000 4.0000 2.5000 0 NULL NULL > +test t1 b 2 10 0.0000 4.0000 1.1111 0 NULL NULL > +analyze > +select * from t1 where a = 1 and b=3; > +id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra > +1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 2.78 10.00 Using where > +# > +# with use_stat_tables= PREFERABLY_FOR_QUERIES > +# analyze table t1 will collect statistics if we use PERSISTENT > +# for columns, indexes or everything > +# > +analyze table t1 persistent for columns (a) indexes (); > +Table Op Msg_type Msg_text > +test.t1 analyze status Engine-independent statistics collected > +test.t1 analyze status Table is already up to date > +select * from mysql.column_stats; > +db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram > +test t1 a 1 4 0.0000 4.0000 2.5000 0 NULL NULL > +test t1 b 2 10 0.0000 4.0000 1.1111 0 NULL NULL > +# filtered shows that we used the data from stat tables > +analyze > +select * from t1 where a = 1 and b=3; > +id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra > +1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 2.78 10.00 Using where > +# > +# with use_stat_tables= PREFERABLY > +# analyze table t1 will collect statistics > +# > +set @@use_stat_tables=PREFERABLY; > +analyze table t1; > +Table Op Msg_type Msg_text > +test.t1 analyze status Engine-independent statistics collected > +test.t1 analyze status Table is already up to date > +select * from mysql.column_stats; > +db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram > +test t1 a 1 4 0.0000 4.0000 2.5000 0 NULL NULL > +test t1 b 2 10 0.0000 4.0000 1.1111 0 NULL NULL > +# filtered shows that we used the data from stat tables > +analyze > +select * from t1 where a=1 and b=3; > +id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra > +1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 2.78 10.00 Using where > +drop table t1; > set use_stat_tables=@save_use_stat_tables; > diff --git a/mysql-test/main/stat_tables.test b/mysql-test/main/stat_tables.test > index 19bc0fa2f46..8616f6386e1 100644 > --- a/mysql-test/main/stat_tables.test > +++ b/mysql-test/main/stat_tables.test > @@ -384,4 +384,47 @@ SELECT MAX(pk) FROM t1; > > DROP TABLE t1; > > +--echo # > +--echo # MDEV-17255: New optimizer defaults and ANALYZE TABLE > +--echo # > + > +set @save_use_stat_tables= @@use_stat_tables; > +create table t1 (a int, b int); > +insert into t1(a,b) values (1,2),(1,3),(1,4),(1,5),(2,6),(2,7),(3,8),(3,9),(3,9),(4,10); > + > +--echo # > +--echo # with use_stat_tables= PREFERABLY_FOR_QUERIES > +--echo # analyze table t1 will not collect statistics > +--echo # > + > +analyze table t1; > +select * from mysql.column_stats; > +analyze > +select * from t1 where a = 1 and b=3; > + > +--echo # > +--echo # with use_stat_tables= PREFERABLY_FOR_QUERIES > +--echo # analyze table t1 will collect statistics if we use PERSISTENT > +--echo # for columns, indexes or everything > +--echo # > + > +analyze table t1 persistent for columns (a) indexes (); > +select * from mysql.column_stats; > +--echo # filtered shows that we used the data from stat tables > +analyze > +select * from t1 where a = 1 and b=3; > + > +--echo # > +--echo # with use_stat_tables= PREFERABLY > +--echo # analyze table t1 will collect statistics > +--echo # > + > +set @@use_stat_tables=PREFERABLY; > +analyze table t1; > +select * from mysql.column_stats; > +--echo # filtered shows that we used the data from stat tables > +analyze > +select * from t1 where a=1 and b=3; > +drop table t1; > + > set use_stat_tables=@save_use_stat_tables; > diff --git a/mysql-test/main/stat_tables_innodb.result b/mysql-test/main/stat_tables_innodb.result > index 8198e94dc10..4bb8f34712c 100644 > --- a/mysql-test/main/stat_tables_innodb.result > +++ b/mysql-test/main/stat_tables_innodb.result > @@ -632,6 +632,65 @@ SELECT MAX(pk) FROM t1; > MAX(pk) > NULL > DROP TABLE t1; > +# > +# MDEV-17255: New optimizer defaults and ANALYZE TABLE > +# > +set @save_use_stat_tables= @@use_stat_tables; > +create table t1 (a int, b int); > +insert into t1(a,b) values (1,2),(1,3),(1,4),(1,5),(2,6),(2,7),(3,8),(3,9),(3,9),(4,10); > +# > +# with use_stat_tables= PREFERABLY_FOR_QUERIES > +# analyze table t1 will not collect statistics > +# > +analyze table t1; > +Table Op Msg_type Msg_text > +test.t1 analyze status Engine-independent statistics collected > +test.t1 analyze status OK > +select * from mysql.column_stats; > +db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram > +test t1 a 1 4 0.0000 4.0000 2.5000 0 NULL NULL > +test t1 b 2 10 0.0000 4.0000 1.1111 0 NULL NULL > +analyze > +select * from t1 where a = 1 and b=3; > +id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra > +1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 2.78 10.00 Using where > +# > +# with use_stat_tables= PREFERABLY_FOR_QUERIES > +# analyze table t1 will collect statistics if we use PERSISTENT > +# for columns, indexes or everything > +# > +analyze table t1 persistent for columns (a) indexes (); > +Table Op Msg_type Msg_text > +test.t1 analyze status Engine-independent statistics collected > +test.t1 analyze status OK > +select * from mysql.column_stats; > +db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram > +test t1 a 1 4 0.0000 4.0000 2.5000 0 NULL NULL > +test t1 b 2 10 0.0000 4.0000 1.1111 0 NULL NULL > +# filtered shows that we used the data from stat tables > +analyze > +select * from t1 where a = 1 and b=3; > +id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra > +1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 2.78 10.00 Using where > +# > +# with use_stat_tables= PREFERABLY > +# analyze table t1 will collect statistics > +# > +set @@use_stat_tables=PREFERABLY; > +analyze table t1; > +Table Op Msg_type Msg_text > +test.t1 analyze status Engine-independent statistics collected > +test.t1 analyze status OK > +select * from mysql.column_stats; > +db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram > +test t1 a 1 4 0.0000 4.0000 2.5000 0 NULL NULL > +test t1 b 2 10 0.0000 4.0000 1.1111 0 NULL NULL > +# filtered shows that we used the data from stat tables > +analyze > +select * from t1 where a=1 and b=3; > +id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra > +1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 2.78 10.00 Using where > +drop table t1; > set use_stat_tables=@save_use_stat_tables; > set optimizer_switch=@save_optimizer_switch_for_stat_tables_test; > SET SESSION STORAGE_ENGINE=DEFAULT; > diff --git a/sql/sql_admin.cc b/sql/sql_admin.cc > index d0d959de8f9..b39103e382a 100644 > --- a/sql/sql_admin.cc > +++ b/sql/sql_admin.cc > @@ -767,7 +767,7 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables, > } > collect_eis= > (table->table->s->table_category == TABLE_CATEGORY_USER && > - (get_use_stat_tables_mode(thd) > NEVER || > + (check_eits_collection_allowed(thd) || > lex->with_persistent_for_clause)); > > > diff --git a/sql/sql_statistics.cc b/sql/sql_statistics.cc > index 04806f07b3b..8c88f7f927f 100644 > --- a/sql/sql_statistics.cc > +++ b/sql/sql_statistics.cc > @@ -3720,9 +3720,8 @@ void set_statistics_for_table(THD *thd, TABLE *table) > { > TABLE_STATISTICS_CB *stats_cb= &table->s->stats_cb; > Table_statistics *read_stats= stats_cb->table_stats; > - Use_stat_tables_mode use_stat_table_mode= get_use_stat_tables_mode(thd); > table->used_stat_records= > - (use_stat_table_mode <= COMPLEMENTARY || > + (!check_eits_preferred(thd) || > !table->stats_is_read || read_stats->cardinality_is_null) ? > table->file->stats.records : read_stats->cardinality; > KEY *key_info, *key_info_end; > @@ -3730,7 +3729,7 @@ void set_statistics_for_table(THD *thd, TABLE *table) > key_info < key_info_end; key_info++) > { > key_info->is_statistics_from_stat_tables= > - (use_stat_table_mode > COMPLEMENTARY && > + (check_eits_preferred(thd) && > table->stats_is_read && > key_info->read_stats->avg_frequency_is_inited() && > key_info->read_stats->get_avg_frequency(0) > 0.5); > diff --git a/sql/sql_statistics.h b/sql/sql_statistics.h > index 39cddf95188..8439ac8db53 100644 > --- a/sql/sql_statistics.h > +++ b/sql/sql_statistics.h > @@ -16,12 +16,26 @@ > #ifndef SQL_STATISTICS_H > #define SQL_STATISTICS_H > > +/* > + For COMPLEMENTARY_FOR_QUERIES and PREFERABLY_FOR_QUERIES they are > + similar to the COMPLEMENTARY and PREFERABLY respectively except that > + with these values we would not be collecting EITS for queries like > + ANALYZE TABLE t1; > + To collect EITS with these values, we have to use PERSISITENT FOR > + analyze table t1 persistent for > + columns (col1,col2...) index (idx1, idx2...) > + or > + analyze table t1 persistent for all > +*/ > + > typedef > enum enum_use_stat_tables_mode > { > NEVER, > COMPLEMENTARY, > PREFERABLY, > + COMPLEMENTARY_FOR_QUERIES, > + PREFERABLY_FOR_QUERIES > } Use_stat_tables_mode; > > typedef > @@ -87,6 +101,19 @@ Use_stat_tables_mode get_use_stat_tables_mode(THD *thd) > { > return (Use_stat_tables_mode) (thd->variables.use_stat_tables); > } > +inline > +bool check_eits_collection_allowed(THD *thd) > +{ > + return (get_use_stat_tables_mode(thd) == COMPLEMENTARY || > + get_use_stat_tables_mode(thd) == PREFERABLY); > +} > + > +inline > +bool check_eits_preferred(THD *thd) > +{ > + return (get_use_stat_tables_mode(thd) == PREFERABLY || > + get_use_stat_tables_mode(thd) == PREFERABLY_FOR_QUERIES); > +} > > int read_statistics_for_tables_if_needed(THD *thd, TABLE_LIST *tables); > int collect_statistics_for_table(THD *thd, TABLE *table); > diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc > index 420e7feabde..b925de34db4 100644 > --- a/sql/sys_vars.cc > +++ b/sql/sys_vars.cc > @@ -5842,12 +5842,13 @@ static Sys_var_ulong Sys_progress_report_time( > VALID_RANGE(0, UINT_MAX), DEFAULT(5), BLOCK_SIZE(1)); > > const char *use_stat_tables_modes[] = > - {"NEVER", "COMPLEMENTARY", "PREFERABLY", 0}; > + {"NEVER", "COMPLEMENTARY", "PREFERABLY", > + "COMPLEMENTARY_FOR_QUERIES", "PREFERABLY_FOR_QUERIES", 0}; > static Sys_var_enum Sys_optimizer_use_stat_tables( > "use_stat_tables", > "Specifies how to use system statistics tables", > SESSION_VAR(use_stat_tables), CMD_LINE(REQUIRED_ARG), > - use_stat_tables_modes, DEFAULT(2)); > + use_stat_tables_modes, DEFAULT(4)); > > static Sys_var_ulong Sys_histogram_size( > "histogram_size", > _______________________________________________ > commits mailing list > commits(a)mariadb.org > https://lists.askmonty.org/cgi-bin/mailman/listinfo/commits -- BR Sergei -- Sergei Petrunia, Software Developer MariaDB Corporation | Skype: sergefp | Blog: http://s.petrunia.net/blog

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Re: [Maria-developers] af6a8ea0f79: MDEV-16266 : New command FLUSH SSL ro reload SSL acceptor context.
by Sergei Golubchik 06 Dec '18

06 Dec '18

Hi, Vladislav! Again, that's quite ok. I don't like a new lock around sslaccept(), but I couldn't find any other solution for it :( See few comments below. On Dec 03, Vladislav Vaintroub wrote: > revision-id: af6a8ea0f79d628384a61986482dec7d3ff751dd (mariadb-10.4.0-55-gaf6a8ea0f79) > parent(s): 757530b83ca1cc550127311dc6edb47152ba0c6a > author: Vladislav Vaintroub <wlad(a)mariadb.com> > committer: Vladislav Vaintroub <wlad(a)mariadb.com> > timestamp: 2018-12-02 01:25:04 +0100 > message: > > MDEV-16266 : New command FLUSH SSL ro reload SSL acceptor context. > > Reloads certificate, key, CA, CRL. > > diff --git a/mysql-test/main/flush_ssl.test b/mysql-test/main/flush_ssl.test > new file mode 100644 > index 00000000000..24dbb4719f3 > --- /dev/null > +++ b/mysql-test/main/flush_ssl.test > @@ -0,0 +1,24 @@ > +source include/have_ssl_communication.inc; > + > +connect ssl_con,localhost,root,,,,,SSL; > +SELECT VARIABLE_VALUE != '0' FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME='SSL_ACCEPTS'; > +FLUSH SSL; > + > +# Check if SSL_ACCEPTS was flushed (SSL_ACCEPTS = 0) > +SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME='SSL_ACCEPTS'; How about the test that a certificate was actually reloaded? That's the main functionality, right? Nobody wanted a new command just to reset SSL_ACCEPTS Note, that if you want to generate a new certificate for mysql-test, don't forget to extend mysql-test/lib/generate-ssl-certs.sh > + > +CREATE USER u; > +connect ssl_con2,localhost,u,,,,,SSL; > + > +# Check SSL_ACCEPTS increased to 1 > +SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME='SSL_ACCEPTS'; > + > +# Check that FLUSH SSL does not work for unprivileged user > +error ER_SPECIFIC_ACCESS_DENIED_ERROR; > +FLUSH SSL; > + > +disconnect ssl_con2; > +disconnect ssl_con; > +connection default; > +DROP USER u; > + > diff --git a/sql/mysqld.cc b/sql/mysqld.cc > index 9ff47dc1ff1..13aad0a0197 100644 > --- a/sql/mysqld.cc > +++ b/sql/mysqld.cc > @@ -4766,6 +4771,56 @@ static void openssl_lock(int mode, openssl_lock_t *lock, const char *file, > } > #endif /* HAVE_OPENSSL10 */ > > + > +struct SSL_ACCEPTOR_STATS > +{ > + long accept; > + long accept_good; > + long cache_size; > + long verify_mode; > + long verify_depth; > + const char *session_cache_mode; > + long zero; > + SSL_ACCEPTOR_STATS() > + { > + session_cache_mode = "NONE"; are you relying on everything else being zero'ed by default because SSL_ACCEPTOR_STATS is instantiated statically? May be, still, add a bzero? > + } > + void init() > + { > + DBUG_ASSERT(ssl_acceptor_fd); > + accept = 0; > + accept_good = 0; > + verify_mode = SSL_CTX_get_verify_mode(ssl_acceptor_fd->ssl_context); > + verify_depth = SSL_CTX_get_verify_depth(ssl_acceptor_fd->ssl_context); > + cache_size = SSL_CTX_sess_get_cache_size(ssl_acceptor_fd->ssl_context); > + switch (SSL_CTX_get_session_cache_mode(ssl_acceptor_fd->ssl_context)) > + { > + case SSL_SESS_CACHE_OFF: > + session_cache_mode = "OFF"; break; > + case SSL_SESS_CACHE_CLIENT: > + session_cache_mode = "CLIENT"; break; > + case SSL_SESS_CACHE_SERVER: > + session_cache_mode = "SERVER"; break; > + case SSL_SESS_CACHE_BOTH: > + session_cache_mode = "BOTH"; break; > + case SSL_SESS_CACHE_NO_AUTO_CLEAR: > + session_cache_mode = "NO_AUTO_CLEAR"; break; > + case SSL_SESS_CACHE_NO_INTERNAL_LOOKUP: > + session_cache_mode = "NO_INTERNAL_LOOKUP"; break; > + default: > + session_cache_mode = "Unknown"; break; > + } > + } > +}; > + > +static SSL_ACCEPTOR_STATS ssl_acceptor_stats; > +void ssl_acceptor_stats_update(int sslaccept_ret) > +{ > + ssl_acceptor_stats.accept++; > + if (!sslaccept_ret) > + ssl_acceptor_stats.accept_good++; use statistic_increment here > +} > + > static void init_ssl() > { > #if defined(HAVE_OPENSSL) && !defined(EMBEDDED_LIBRARY) > @@ -4804,6 +4862,38 @@ static void init_ssl() > #endif /* HAVE_OPENSSL && ! EMBEDDED_LIBRARY */ > } > > +/* Reinitialize SSL (FLUSH SSL) */ > +int reinit_ssl() > +{ > +#if defined(HAVE_OPENSSL) && !defined(EMBEDDED_LIBRARY) > + if (!opt_use_ssl) > + return 0; > +#ifndef DBUG_OFF > + char *old_ssl_cert; it's generally prefered to use __attribute__((unused)) instead of #ifdef > +#endif > + > + DBUG_EXECUTE_IF("simulate_bad_ssl_cert", old_ssl_cert= opt_ssl_cert; opt_ssl_cert=const_cast<char *>("");); > + > + enum enum_ssl_init_error error = SSL_INITERR_NOERROR; > + st_VioSSLFd *new_fd = new_VioSSLAcceptorFd(opt_ssl_key, opt_ssl_cert, > + opt_ssl_ca, opt_ssl_capath, opt_ssl_cipher, &error, opt_ssl_crl, opt_ssl_crlpath); > + > + DBUG_EXECUTE_IF("simulate_bad_ssl_cert", opt_ssl_cert= old_ssl_cert;); > + > + if (!new_fd) > + { > + my_printf_error(ER_UNKNOWN_ERROR, "Failed to refresh SSL, error: %s", MYF(0), > + sslGetErrString(error)); > + return 1; > + } > + mysql_rwlock_wrlock(&LOCK_ssl_refresh); > + free_vio_ssl_acceptor_fd(ssl_acceptor_fd); > + ssl_acceptor_fd= new_fd; > + ssl_acceptor_stats.init(); > + mysql_rwlock_unlock(&LOCK_ssl_refresh); > + return 0; > +#endif > +} > Regards, Sergei Chief Architect MariaDB and security(a)mariadb.org

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[Maria-developers] MDEV-16188: Rowid filtering: EXPLAIN FORMAT=JSON support
by Sergey Petrunia 04 Dec '18

04 Dec '18

Hello Igor, I have pushed into 10.4-mdev16188 tree a patch that adds EXPLAIN FORMAT=JSON support. There is no ANALYZE support, yet. main.rowid_filter has an example of EXPLAIN FORMAT=JSON at the bottom. The filter is described like so: + "rowid_filter": { + "range": { + "key": "i_l_shipdate", + "used_key_parts": ["l_shipDATE"] + }, + "rows": 8, + "selectivity_pct": 0.1332 + }, Here "rows" is how many rows we will get from the quick select that is used to build the filter. selectivity_pct is the selectivity of the filter. You will also notice this change from (1%) to (0%): -1 SIMPLE lineitem range|filter PRIMARY,i_l_shipdate,i_l_receiptdate,i_l_orderkey,i_l_orderkey_quantity i_l_receiptdate|i_l_shipdate 4|4 NULL 6 (1%) Using index condition; Using where; Using filter +1 SIMPLE lineitem range|filter PRIMARY,i_l_shipdate,i_l_receiptdate,i_l_orderkey,i_l_orderkey_quantity i_l_receiptdate|i_l_shipdate 4|4 NULL 6 (0%) Using index condition; Using where; Using filter This is because the original code had a piece of logic in JOIN_TAB::save_filter_explain_data: print "1%" if it was "0%". I'm wondering, is there any reason we cannot print the number with greater precision in this case? BR Sergei -- Sergei Petrunia, Software Developer MariaDB Corporation | Skype: sergefp | Blog: http://s.petrunia.net/blog

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Re: [Maria-developers] 2397c00086c: MDEV-15649 Speedup search in acl_users and acl_dbs array,
by Sergei Golubchik 03 Dec '18

03 Dec '18

Hi, Vladislav! Okay. Frankly, that's not how I'd done it, but it'll work. Only a few minor comments below, then ok to push. On Dec 03, Vladislav Vaintroub wrote: > revision-id: 2397c00086c4d9df5e2bbad70803e293f5a47984 (mariadb-10.4.0-37-g2397c00086c) > parent(s): 46a411088c5abbacda4e52e89f4dbcf52a451f7a > author: Vladislav Vaintroub <wlad(a)mariadb.com> > committer: Vladislav Vaintroub <wlad(a)mariadb.com> > timestamp: 2018-11-30 18:14:00 +0100 > message: > > MDEV-15649 Speedup search in acl_users and acl_dbs array, > sorting them by usernames first, and then by get_sort() value. > > Search functions now use binary search to find the the first entry with > given name. Then, linear search is done, until the first match. > > diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc > index 052c5ada3a2..932c4189e3f 100644 > --- a/sql/sql_acl.cc > +++ b/sql/sql_acl.cc > @@ -2326,6 +2328,156 @@ static int acl_compare(ACL_ACCESS *a,ACL_ACCESS *b) > + > + > +static inline const char *get_username(const ACL_DB& acl_db) > +{ > + return acl_db.user; > +} > + > + > +static inline const char *get_username(const ACL_USER& acl_user) > +{ > + return acl_user.user.str; > +} I'd do them as methods in ACL_DB and ACL_USER > + > +/* > + Return index of the first entry with given user in the array, > + or UINT_MAX if not found. > + > + Assumes the array is sorted by get_username > +*/ > +template<typename T> uint find_first_user(T* arr, uint len, const char *user) > +{ > + uint low= 0; > + uint high= len - 1; > + uint mid; > + if(!len) > + return UINT_MAX; > + > +#ifndef DBUG_OFF > + for (uint i = 0; i < len - 1; i++) > + DBUG_ASSERT(strcmp(get_username(arr[i]), get_username(arr[i + 1])) <= 0); > +#endif > + while (low <= high) > + { > + mid = low + (high - low) / 2; > + int cmp = strcmp(get_username(arr[mid]), user); > + if (cmp == 0) > + { > + /* > + We are looking for the left-most element in the array with the given value. > + Thus, even if value is found, we still have to check the left neighbor, > + and if it has the same value, continue the search. > + */ > + if (mid > 0 && !strcmp(get_username(arr[mid - 1]), user)) > + cmp = 1; hmm, I thought, normally it's done not by checking the left neighbor, but by `if (cmp <=0 )` and continuing the search until low>high > + } > + > + if (cmp > 0) > + { > + if (mid == 0) > + break; > + high= mid - 1; > + } > + else if (cmp < 0) > + low= mid + 1; > + else > + return mid; > + } > + return UINT_MAX; > +} > + > +static ACL_DB *acl_db_find(const char *db, const char *user, const char *host, const char *ip, my_bool db_is_pattern) > +{ > + uint i; > + ACL_DB *ret = NULL; > + > + // Check databases with matching user name. > + uint start= acl_find_db_by_username(user); > + for (i= start; i < acl_dbs.elements; i++) > + { > + ACL_DB *acl_db= dynamic_element(&acl_dbs, i, ACL_DB*); > + if (i > start && strcmp(user, acl_db->user)) > + break; > + > + if(acl_db_matches(acl_db, db, host, ip,db_is_pattern)) > + { > + ret= acl_db; > + break; > + } > + } > + > + // Look also for anonymous user (at the start of array due to sort by name). > + for (i = 0; i < acl_dbs.elements; i++) > + { > + ACL_DB *acl_db= dynamic_element(&acl_dbs, i, ACL_DB*); > + if (*acl_db->user || (ret && acl_compare(acl_db, ret) >= 0)) > + break; > + if (acl_db_matches(acl_db, db, host, ip, db_is_pattern)) > + { > + ret= acl_db; > + break; > + } > + } > + return ret; > +} that's the same logic as in find_user_or_anon(). May be you could template that out too? Another thought - this is a pretty weird-looking search logic. Please add a comment that its goal is to emulate historical behavior, where entries were found by a linear search in an array sorted by the get_sort() value. > @@ -3437,10 +3579,14 @@ static ACL_USER * find_user_wild(const char *host, const char *user, const char > { > mysql_mutex_assert_owner(&acl_cache->lock); > > - for (uint i=0 ; i < acl_users.elements ; i++) > + uint start = acl_find_user_by_name(user); > + > + for (uint i= start; i < acl_users.elements; i++) > { > ACL_USER *acl_user=dynamic_element(&acl_users,i,ACL_USER*); > - if (acl_user->wild_eq(user, host, ip)) This makes wild_eq method kind of pointless. Remove it? > + if (i > start && strcmp(acl_user->user.str, user)) > + break; > + if (compare_hostname(&acl_user->host, host, ip ? ip : host)) > return acl_user; > } > return 0; Regards, Sergei Chief Architect MariaDB and security(a)mariadb.org

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[Maria-developers] Do we support compilers that support C++11 but not thread_local?
by Sergey Petrunia 27 Nov '18

27 Nov '18

Hi, I'm writing this in connection with MyRocks Storage Engine and https://github.com/facebook/mysql-5.6/issues/904 C++ 11 includes "thread_local" specifier : https://en.cppreference.com/w/cpp/keyword/thread_local GNU also has __thread, which was available before C++11. RocksDB (and so MyRocks) uses both __thread and thread_local. thread_local is part of the standard, so they might switch to thread_local. The question: will it cause any issues for us? In other words, do we have compilers/environments that - claim to support C++11 (so that we attempt to compile MyRocks) - but do not support "thread_local" ? For Windows, RocksDB does this in port/win/port_win.h: #ifndef __thread #define __thread __declspec(thread) #endif but this page page about Visual Studio 2015) https://msdn.microsoft.com/en-us/library/6yh4a9k1.aspx says that C++11: The thread_local storage class specifier is the recommended way to specify thread-local storage for objects and class members. I assume this means it's ok to use thread_local on Windows? RocksDB source code mentions one problematic case: // However, thread_local is not supported in all compilers that accept -std=c++11 // (e.g., eg Mac with XCode < 8. XCode 8+ supports thread_local). As far as I understand this is not relevant for us? Anyone aware of other such cases? BR Sergei -- Sergei Petrunia, Software Developer MariaDB Corporation | Skype: sergefp | Blog: http://s.petrunia.net/blog

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