June 2010 - developers - lists.mariadb.org

[Maria-developers] WL#78 Deleted (by Serg): INSTALL PLUGIN *
by worklog-noreply＠askmonty.org 28 Jun '10

28 Jun '10

----------------------------------------------------------------------- WORKLOG TASK -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- TASK...........: INSTALL PLUGIN * CREATION DATE..: Tue, 09 Feb 2010, 18:10 SUPERVISOR.....: Sergei IMPLEMENTOR....: COPIES TO......: CATEGORY.......: Server-RawIdeaBin TASK ID........: 78 (http://askmonty.org/worklog/?tid=78) VERSION........: WorkLog-3.4 STATUS.........: Cancelled PRIORITY.......: 60 WORKED HOURS...: 0 ESTIMATE.......: 10 (hours remain) ORIG. ESTIMATE.: 10 PROGRESS NOTES: -=-=(Serg - Mon, 08 Mar 2010, 20:13)=-=- High Level Description modified. --- /tmp/wklog.78.old.32207 2010-03-08 20:13:06.000000000 +0000 +++ /tmp/wklog.78.new.32207 2010-03-08 20:13:06.000000000 +0000 @@ -6,3 +6,5 @@ INSTALL PLUGIN * SONAME xxx would be a more convenient way to install everything at once. + +cancelled, as a duplicate of mwl:77 -=-=(Serg - Mon, 08 Mar 2010, 20:12)=-=- Status updated. --- /tmp/wklog.78.old.32035 2010-03-08 20:12:39.000000000 +0000 +++ /tmp/wklog.78.new.32035 2010-03-08 20:12:39.000000000 +0000 @@ -1 +1 @@ -Un-Assigned +Cancelled DESCRIPTION: InnoDB, XtraDB, PBXT (at least) come with a storage engine plugin and many information_schema plugins in one .so file. Currently one needs to install them all one by one. INSTALL PLUGIN * SONAME xxx would be a more convenient way to install everything at once. cancelled, as a duplicate of mwl:77 ESTIMATED WORK TIME ESTIMATED COMPLETION DATE ----------------------------------------------------------------------- WorkLog (v4.0.0)

1 0

[Maria-developers] WL#78 Deleted (by Serg): INSTALL PLUGIN *
by worklog-noreply＠askmonty.org 28 Jun '10

28 Jun '10

----------------------------------------------------------------------- WORKLOG TASK -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- TASK...........: INSTALL PLUGIN * CREATION DATE..: Tue, 09 Feb 2010, 18:10 SUPERVISOR.....: Sergei IMPLEMENTOR....: COPIES TO......: CATEGORY.......: Server-RawIdeaBin TASK ID........: 78 (http://askmonty.org/worklog/?tid=78) VERSION........: WorkLog-3.4 STATUS.........: Cancelled PRIORITY.......: 60 WORKED HOURS...: 0 ESTIMATE.......: 10 (hours remain) ORIG. ESTIMATE.: 10 PROGRESS NOTES: -=-=(Serg - Mon, 08 Mar 2010, 20:13)=-=- High Level Description modified. --- /tmp/wklog.78.old.32207 2010-03-08 20:13:06.000000000 +0000 +++ /tmp/wklog.78.new.32207 2010-03-08 20:13:06.000000000 +0000 @@ -6,3 +6,5 @@ INSTALL PLUGIN * SONAME xxx would be a more convenient way to install everything at once. + +cancelled, as a duplicate of mwl:77 -=-=(Serg - Mon, 08 Mar 2010, 20:12)=-=- Status updated. --- /tmp/wklog.78.old.32035 2010-03-08 20:12:39.000000000 +0000 +++ /tmp/wklog.78.new.32035 2010-03-08 20:12:39.000000000 +0000 @@ -1 +1 @@ -Un-Assigned +Cancelled DESCRIPTION: InnoDB, XtraDB, PBXT (at least) come with a storage engine plugin and many information_schema plugins in one .so file. Currently one needs to install them all one by one. INSTALL PLUGIN * SONAME xxx would be a more convenient way to install everything at once. cancelled, as a duplicate of mwl:77 ESTIMATED WORK TIME ESTIMATED COMPLETION DATE ----------------------------------------------------------------------- WorkLog (v4.0.0)

1 0

[Maria-developers] WL#75 Deleted (by Serg): Extend build to create a shared libmysqld.so library
by worklog-noreply＠askmonty.org 28 Jun '10

28 Jun '10

----------------------------------------------------------------------- WORKLOG TASK -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- TASK...........: Extend build to create a shared libmysqld.so library CREATION DATE..: Fri, 22 Jan 2010, 09:39 SUPERVISOR.....: Knielsen IMPLEMENTOR....: COPIES TO......: CATEGORY.......: Server-RawIdeaBin TASK ID........: 75 (http://askmonty.org/worklog/?tid=75) VERSION........: Server-9.x STATUS.........: Un-Assigned PRIORITY.......: 60 WORKED HOURS...: 0 ESTIMATE.......: 0 (hours remain) ORIG. ESTIMATE.: 0 PROGRESS NOTES: DESCRIPTION: Currently, the embedded library libmysqld is only built as a static library, libmysqld.a. However, there is also a need for a shared embedded library, libmysqld.so. A good example is Amarok, which is now using MySQL (and by default an embedded libmysqld) for storing the user's music collection. Amarok is designed to load a number of modules as .so plugins, and the code using libmysqld is one such plugin. Any code that is to be loaded as a shared object on Linux must be built with -fPIC (position independent code). Any library used must thus also be built with -fPIC and preferably itself be linked statically. Amarok is a widely used application (end-user desktop). It could be a good leverage for making libmysqld more popular eg. in distros. However, currently the distros need to resort to various hacks to make things work with libmysqld and Amarok. Some links: Fedora patches .spec to add -fPIC in the build, extract all objects from libmysqld.a, and re-link them as libmysqld.so. http://cvs.fedoraproject.org/viewvc/devel/mysql/mysql.spec?r1=1.108&r2=1.109 Gentoo apparently have a patch for MySQL to build libmysqld.so: http://bugs.gentoo.org/attachment.cgi?id=188057 Debian seems to suggest building both libmysqld.a and libmysqld_pic.a, the latter to be used for shared objects linking with embedded server: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=508406#52 It would be nice if the main build system was able to build properly libmysqld.so, so different distros would not need to resort to different hacks to get things working. The normal way to build both .a and .so as far as I know is to use libtool; it will then build each object twice (with and without -fPIC) if needed. This one might want to make optional to reduce build times. It would also need to be done for each storage engine. An alternative would be to build everything with -fPIC. This should probably be optional also, as on some architectures (ELF x86 32-bit), there is some speed penalty for -fPIC. The libmysqld.so would then be made only in this case. Distro packages could do a separate build with -fPIC to make libmysqld.so (to not get -fPIC into the main server code). There is a MySQL bug for this: http://bugs.mysql.com/bug.php?id=39288 ESTIMATED WORK TIME ESTIMATED COMPLETION DATE ----------------------------------------------------------------------- WorkLog (v4.0.0)

1 0

[Maria-developers] WL#84 Deleted (by Serg): Unused
by worklog-noreply＠askmonty.org 28 Jun '10

28 Jun '10

----------------------------------------------------------------------- WORKLOG TASK -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- TASK...........: Unused CREATION DATE..: Sun, 14 Feb 2010, 00:09 SUPERVISOR.....: Monty IMPLEMENTOR....: COPIES TO......: Igor, Monty, Sergei CATEGORY.......: Server-BackLog TASK ID........: 84 (http://askmonty.org/worklog/?tid=84) VERSION........: Server-9.x STATUS.........: Assigned PRIORITY.......: 60 WORKED HOURS...: 0 ESTIMATE.......: (hours remain) ORIG. ESTIMATE.: 0 PROGRESS NOTES: -=-=(Igor - Tue, 16 Mar 2010, 19:28)=-=- Title modified. --- /tmp/wklog.84.old.22271 2010-03-16 19:28:50.000000000 +0000 +++ /tmp/wklog.84.new.22271 2010-03-16 19:28:50.000000000 +0000 @@ -1 +1 @@ -Partitioned Key Cache for MyISAM +Unused -=-=(Igor - Tue, 16 Mar 2010, 19:28)=-=- Version updated. --- /tmp/wklog.84.old.22271 2010-03-16 19:28:50.000000000 +0000 +++ /tmp/wklog.84.new.22271 2010-03-16 19:28:50.000000000 +0000 @@ -1 +1 @@ -Benchmarks-3.0 +Server-9.x -=-=(Igor - Tue, 16 Mar 2010, 19:28)=-=- High Level Description modified. --- /tmp/wklog.84.old.22253 2010-03-16 19:28:09.000000000 +0000 +++ /tmp/wklog.84.new.22253 2010-03-16 19:28:09.000000000 +0000 @@ -1,18 +1 @@ -A partitioned key cache is a collection of structures for regular MyiSAM key -caches called key cache partitions. Any page from a file can be placed into a -buffer of only one partition. The number of the partition is calculated from the -file number and the position of the page in the file, and it's always the same -for the page. The function that maps pages into partitions takes care of even -distribution of pages among partitions. -Partition key cache mitigate one of the major problem of simple key cache: -thread contention for key cache lock (mutex). Every call of a key cache -interface function must acquire this lock. So threads compete for this lock even -in the case when they have acquired shared locks for the file and pages they -want read from are in the key cache buffers. When working with a partitioned key -cache any key cache interface function that needs only one page has to acquire -the key cache lock only for the partition the page is ascribed to. This makes -the chances for threads not compete for the same key cache lock better. - -The idea and the original of the partitioned key cache was provided by one of -our external contributers. DESCRIPTION: ESTIMATED WORK TIME ESTIMATED COMPLETION DATE ----------------------------------------------------------------------- WorkLog (v4.0.0)

1 0

[Maria-developers] WL#84 Deleted (by Serg): Unused
by worklog-noreply＠askmonty.org 28 Jun '10

28 Jun '10

----------------------------------------------------------------------- WORKLOG TASK -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- TASK...........: Unused CREATION DATE..: Sun, 14 Feb 2010, 00:09 SUPERVISOR.....: Monty IMPLEMENTOR....: COPIES TO......: Igor, Monty, Sergei CATEGORY.......: Server-BackLog TASK ID........: 84 (http://askmonty.org/worklog/?tid=84) VERSION........: Server-9.x STATUS.........: Assigned PRIORITY.......: 60 WORKED HOURS...: 0 ESTIMATE.......: (hours remain) ORIG. ESTIMATE.: 0 PROGRESS NOTES: -=-=(Igor - Tue, 16 Mar 2010, 19:28)=-=- Title modified. --- /tmp/wklog.84.old.22271 2010-03-16 19:28:50.000000000 +0000 +++ /tmp/wklog.84.new.22271 2010-03-16 19:28:50.000000000 +0000 @@ -1 +1 @@ -Partitioned Key Cache for MyISAM +Unused -=-=(Igor - Tue, 16 Mar 2010, 19:28)=-=- Version updated. --- /tmp/wklog.84.old.22271 2010-03-16 19:28:50.000000000 +0000 +++ /tmp/wklog.84.new.22271 2010-03-16 19:28:50.000000000 +0000 @@ -1 +1 @@ -Benchmarks-3.0 +Server-9.x -=-=(Igor - Tue, 16 Mar 2010, 19:28)=-=- High Level Description modified. --- /tmp/wklog.84.old.22253 2010-03-16 19:28:09.000000000 +0000 +++ /tmp/wklog.84.new.22253 2010-03-16 19:28:09.000000000 +0000 @@ -1,18 +1 @@ -A partitioned key cache is a collection of structures for regular MyiSAM key -caches called key cache partitions. Any page from a file can be placed into a -buffer of only one partition. The number of the partition is calculated from the -file number and the position of the page in the file, and it's always the same -for the page. The function that maps pages into partitions takes care of even -distribution of pages among partitions. -Partition key cache mitigate one of the major problem of simple key cache: -thread contention for key cache lock (mutex). Every call of a key cache -interface function must acquire this lock. So threads compete for this lock even -in the case when they have acquired shared locks for the file and pages they -want read from are in the key cache buffers. When working with a partitioned key -cache any key cache interface function that needs only one page has to acquire -the key cache lock only for the partition the page is ascribed to. This makes -the chances for threads not compete for the same key cache lock better. - -The idea and the original of the partitioned key cache was provided by one of -our external contributers. DESCRIPTION: ESTIMATED WORK TIME ESTIMATED COMPLETION DATE ----------------------------------------------------------------------- WorkLog (v4.0.0)

1 0

[Maria-developers] WL#84 Deleted (by Serg): Unused
by worklog-noreply＠askmonty.org 28 Jun '10

28 Jun '10

----------------------------------------------------------------------- WORKLOG TASK -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- TASK...........: Unused CREATION DATE..: Sun, 14 Feb 2010, 00:09 SUPERVISOR.....: Monty IMPLEMENTOR....: COPIES TO......: Igor, Monty, Sergei CATEGORY.......: Server-BackLog TASK ID........: 84 (http://askmonty.org/worklog/?tid=84) VERSION........: Server-9.x STATUS.........: Assigned PRIORITY.......: 60 WORKED HOURS...: 0 ESTIMATE.......: (hours remain) ORIG. ESTIMATE.: 0 PROGRESS NOTES: -=-=(Igor - Tue, 16 Mar 2010, 19:28)=-=- Title modified. --- /tmp/wklog.84.old.22271 2010-03-16 19:28:50.000000000 +0000 +++ /tmp/wklog.84.new.22271 2010-03-16 19:28:50.000000000 +0000 @@ -1 +1 @@ -Partitioned Key Cache for MyISAM +Unused -=-=(Igor - Tue, 16 Mar 2010, 19:28)=-=- Version updated. --- /tmp/wklog.84.old.22271 2010-03-16 19:28:50.000000000 +0000 +++ /tmp/wklog.84.new.22271 2010-03-16 19:28:50.000000000 +0000 @@ -1 +1 @@ -Benchmarks-3.0 +Server-9.x -=-=(Igor - Tue, 16 Mar 2010, 19:28)=-=- High Level Description modified. --- /tmp/wklog.84.old.22253 2010-03-16 19:28:09.000000000 +0000 +++ /tmp/wklog.84.new.22253 2010-03-16 19:28:09.000000000 +0000 @@ -1,18 +1 @@ -A partitioned key cache is a collection of structures for regular MyiSAM key -caches called key cache partitions. Any page from a file can be placed into a -buffer of only one partition. The number of the partition is calculated from the -file number and the position of the page in the file, and it's always the same -for the page. The function that maps pages into partitions takes care of even -distribution of pages among partitions. -Partition key cache mitigate one of the major problem of simple key cache: -thread contention for key cache lock (mutex). Every call of a key cache -interface function must acquire this lock. So threads compete for this lock even -in the case when they have acquired shared locks for the file and pages they -want read from are in the key cache buffers. When working with a partitioned key -cache any key cache interface function that needs only one page has to acquire -the key cache lock only for the partition the page is ascribed to. This makes -the chances for threads not compete for the same key cache lock better. - -The idea and the original of the partitioned key cache was provided by one of -our external contributers. DESCRIPTION: ESTIMATED WORK TIME ESTIMATED COMPLETION DATE ----------------------------------------------------------------------- WorkLog (v4.0.0)

1 0

[Maria-developers] WL#86 Deleted (by Serg): Unused
by worklog-noreply＠askmonty.org 28 Jun '10

28 Jun '10

----------------------------------------------------------------------- WORKLOG TASK -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- TASK...........: Unused CREATION DATE..: Sun, 14 Feb 2010, 00:17 SUPERVISOR.....: Monty IMPLEMENTOR....: Igor COPIES TO......: Igor, Monty, Sergei CATEGORY.......: Server-Sprint TASK ID........: 86 (http://askmonty.org/worklog/?tid=86) VERSION........: Server-5.2 STATUS.........: Assigned PRIORITY.......: 60 WORKED HOURS...: 0 ESTIMATE.......: 80 (hours remain) ORIG. ESTIMATE.: 80 PROGRESS NOTES: -=-=(Igor - Tue, 16 Mar 2010, 19:30)=-=- Title modified. --- /tmp/wklog.86.old.22309 2010-03-16 19:30:04.000000000 +0000 +++ /tmp/wklog.86.new.22309 2010-03-16 19:30:04.000000000 +0000 @@ -1 +1 @@ -Partitioned Key Cache for MyISAM +Unused -=-=(Igor - Tue, 16 Mar 2010, 19:29)=-=- High Level Description modified. --- /tmp/wklog.86.old.22292 2010-03-16 19:29:37.000000000 +0000 +++ /tmp/wklog.86.new.22292 2010-03-16 19:29:37.000000000 +0000 @@ -1,19 +1 @@ -A partitioned key cache is a collection of structures for regular MyiSAM key -caches called key cache partitions. Any page from a file can be placed into a -buffer of only one partition. The number of the partition is calculated from the -file number and the position of the page in the file, and it's always the same -for the page. The function that maps pages into partitions takes care of even -distribution of pages among partitions. -Partition key cache mitigate one of the major problem of simple key cache: -thread contention for key cache lock (mutex). Every call of a key cache -interface function must acquire this lock. So threads compete for this lock even -in the case when they have acquired shared locks for the file and pages they -want read from are in the key cache buffers. When working with a partitioned key -cache any key cache interface function that needs only one page has to acquire -the key cache lock only for the partition the page is ascribed to. This makes -the chances for threads not compete for the same key cache lock better. - -The idea and the original of the partitioned key cache was provided by one of -our external contributers (see the attached file segmented_keycache_v2.diff with -the original patch from the contributor). -=-=(Igor - Sun, 14 Feb 2010, 00:19)=-=- Privacy level updated. --- /tmp/wklog.86.old.10092 2010-02-13 22:19:03.000000000 +0000 +++ /tmp/wklog.86.new.10092 2010-02-13 22:19:03.000000000 +0000 @@ -1 +1 @@ -y +n -=-=(Igor - Sun, 14 Feb 2010, 00:19)=-=- Category updated. --- /tmp/wklog.86.old.10092 2010-02-13 22:19:03.000000000 +0000 +++ /tmp/wklog.86.new.10092 2010-02-13 22:19:03.000000000 +0000 @@ -1 +1 @@ -Server-BackLog +Server-Sprint -=-=(Igor - Sun, 14 Feb 2010, 00:18)=-=- Version updated. --- /tmp/wklog.86.old.10044 2010-02-14 00:18:31.000000000 +0200 +++ /tmp/wklog.86.new.10044 2010-02-14 00:18:31.000000000 +0200 @@ -1 +1 @@ -Benchmarks-3.0 +Server-5.2 DESCRIPTION: ESTIMATED WORK TIME ESTIMATED COMPLETION DATE ----------------------------------------------------------------------- WorkLog (v4.0.0)

1 0

[Maria-developers] WL#86 Deleted (by Serg): Unused
by worklog-noreply＠askmonty.org 28 Jun '10

28 Jun '10

----------------------------------------------------------------------- WORKLOG TASK -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- TASK...........: Unused CREATION DATE..: Sun, 14 Feb 2010, 00:17 SUPERVISOR.....: Monty IMPLEMENTOR....: Igor COPIES TO......: Igor, Monty, Sergei CATEGORY.......: Server-Sprint TASK ID........: 86 (http://askmonty.org/worklog/?tid=86) VERSION........: Server-5.2 STATUS.........: Assigned PRIORITY.......: 60 WORKED HOURS...: 0 ESTIMATE.......: 80 (hours remain) ORIG. ESTIMATE.: 80 PROGRESS NOTES: -=-=(Igor - Tue, 16 Mar 2010, 19:30)=-=- Title modified. --- /tmp/wklog.86.old.22309 2010-03-16 19:30:04.000000000 +0000 +++ /tmp/wklog.86.new.22309 2010-03-16 19:30:04.000000000 +0000 @@ -1 +1 @@ -Partitioned Key Cache for MyISAM +Unused -=-=(Igor - Tue, 16 Mar 2010, 19:29)=-=- High Level Description modified. --- /tmp/wklog.86.old.22292 2010-03-16 19:29:37.000000000 +0000 +++ /tmp/wklog.86.new.22292 2010-03-16 19:29:37.000000000 +0000 @@ -1,19 +1 @@ -A partitioned key cache is a collection of structures for regular MyiSAM key -caches called key cache partitions. Any page from a file can be placed into a -buffer of only one partition. The number of the partition is calculated from the -file number and the position of the page in the file, and it's always the same -for the page. The function that maps pages into partitions takes care of even -distribution of pages among partitions. -Partition key cache mitigate one of the major problem of simple key cache: -thread contention for key cache lock (mutex). Every call of a key cache -interface function must acquire this lock. So threads compete for this lock even -in the case when they have acquired shared locks for the file and pages they -want read from are in the key cache buffers. When working with a partitioned key -cache any key cache interface function that needs only one page has to acquire -the key cache lock only for the partition the page is ascribed to. This makes -the chances for threads not compete for the same key cache lock better. - -The idea and the original of the partitioned key cache was provided by one of -our external contributers (see the attached file segmented_keycache_v2.diff with -the original patch from the contributor). -=-=(Igor - Sun, 14 Feb 2010, 00:19)=-=- Privacy level updated. --- /tmp/wklog.86.old.10092 2010-02-13 22:19:03.000000000 +0000 +++ /tmp/wklog.86.new.10092 2010-02-13 22:19:03.000000000 +0000 @@ -1 +1 @@ -y +n -=-=(Igor - Sun, 14 Feb 2010, 00:19)=-=- Category updated. --- /tmp/wklog.86.old.10092 2010-02-13 22:19:03.000000000 +0000 +++ /tmp/wklog.86.new.10092 2010-02-13 22:19:03.000000000 +0000 @@ -1 +1 @@ -Server-BackLog +Server-Sprint -=-=(Igor - Sun, 14 Feb 2010, 00:18)=-=- Version updated. --- /tmp/wklog.86.old.10044 2010-02-14 00:18:31.000000000 +0200 +++ /tmp/wklog.86.new.10044 2010-02-14 00:18:31.000000000 +0200 @@ -1 +1 @@ -Benchmarks-3.0 +Server-5.2 DESCRIPTION: ESTIMATED WORK TIME ESTIMATED COMPLETION DATE ----------------------------------------------------------------------- WorkLog (v4.0.0)

1 0

[Maria-developers] WL#86 Deleted (by Serg): Unused
by worklog-noreply＠askmonty.org 28 Jun '10

28 Jun '10

----------------------------------------------------------------------- WORKLOG TASK -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- TASK...........: Unused CREATION DATE..: Sun, 14 Feb 2010, 00:17 SUPERVISOR.....: Monty IMPLEMENTOR....: Igor COPIES TO......: Igor, Monty, Sergei CATEGORY.......: Server-Sprint TASK ID........: 86 (http://askmonty.org/worklog/?tid=86) VERSION........: Server-5.2 STATUS.........: Assigned PRIORITY.......: 60 WORKED HOURS...: 0 ESTIMATE.......: 80 (hours remain) ORIG. ESTIMATE.: 80 PROGRESS NOTES: -=-=(Igor - Tue, 16 Mar 2010, 19:30)=-=- Title modified. --- /tmp/wklog.86.old.22309 2010-03-16 19:30:04.000000000 +0000 +++ /tmp/wklog.86.new.22309 2010-03-16 19:30:04.000000000 +0000 @@ -1 +1 @@ -Partitioned Key Cache for MyISAM +Unused -=-=(Igor - Tue, 16 Mar 2010, 19:29)=-=- High Level Description modified. --- /tmp/wklog.86.old.22292 2010-03-16 19:29:37.000000000 +0000 +++ /tmp/wklog.86.new.22292 2010-03-16 19:29:37.000000000 +0000 @@ -1,19 +1 @@ -A partitioned key cache is a collection of structures for regular MyiSAM key -caches called key cache partitions. Any page from a file can be placed into a -buffer of only one partition. The number of the partition is calculated from the -file number and the position of the page in the file, and it's always the same -for the page. The function that maps pages into partitions takes care of even -distribution of pages among partitions. -Partition key cache mitigate one of the major problem of simple key cache: -thread contention for key cache lock (mutex). Every call of a key cache -interface function must acquire this lock. So threads compete for this lock even -in the case when they have acquired shared locks for the file and pages they -want read from are in the key cache buffers. When working with a partitioned key -cache any key cache interface function that needs only one page has to acquire -the key cache lock only for the partition the page is ascribed to. This makes -the chances for threads not compete for the same key cache lock better. - -The idea and the original of the partitioned key cache was provided by one of -our external contributers (see the attached file segmented_keycache_v2.diff with -the original patch from the contributor). -=-=(Igor - Sun, 14 Feb 2010, 00:19)=-=- Privacy level updated. --- /tmp/wklog.86.old.10092 2010-02-13 22:19:03.000000000 +0000 +++ /tmp/wklog.86.new.10092 2010-02-13 22:19:03.000000000 +0000 @@ -1 +1 @@ -y +n -=-=(Igor - Sun, 14 Feb 2010, 00:19)=-=- Category updated. --- /tmp/wklog.86.old.10092 2010-02-13 22:19:03.000000000 +0000 +++ /tmp/wklog.86.new.10092 2010-02-13 22:19:03.000000000 +0000 @@ -1 +1 @@ -Server-BackLog +Server-Sprint -=-=(Igor - Sun, 14 Feb 2010, 00:18)=-=- Version updated. --- /tmp/wklog.86.old.10044 2010-02-14 00:18:31.000000000 +0200 +++ /tmp/wklog.86.new.10044 2010-02-14 00:18:31.000000000 +0200 @@ -1 +1 @@ -Benchmarks-3.0 +Server-5.2 DESCRIPTION: ESTIMATED WORK TIME ESTIMATED COMPLETION DATE ----------------------------------------------------------------------- WorkLog (v4.0.0)

1 0

[Maria-developers] WL#93 Deleted (by Serg): Unused
by worklog-noreply＠askmonty.org 28 Jun '10

28 Jun '10

----------------------------------------------------------------------- WORKLOG TASK -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- TASK...........: Unused CREATION DATE..: Sun, 28 Feb 2010, 14:08 SUPERVISOR.....: Monty IMPLEMENTOR....: COPIES TO......: Igor, Psergey, Timour CATEGORY.......: Server-Sprint TASK ID........: 93 (http://askmonty.org/worklog/?tid=93) VERSION........: Server-5.3 STATUS.........: Cancelled PRIORITY.......: 60 WORKED HOURS...: 0 ESTIMATE.......: (hours remain) ORIG. ESTIMATE.: 0 PROGRESS NOTES: -=-=(Serg - Mon, 08 Mar 2010, 20:15)=-=- Status updated. --- /tmp/wklog.93.old.32332 2010-03-08 20:15:35.000000000 +0000 +++ /tmp/wklog.93.new.32332 2010-03-08 20:15:35.000000000 +0000 @@ -1 +1 @@ -Un-Assigned +Cancelled -=-=(Psergey - Sun, 28 Feb 2010, 14:53)=-=- High Level Description modified. --- /tmp/wklog.93.old.22008 2010-02-28 14:53:14.000000000 +0000 +++ /tmp/wklog.93.new.22008 2010-02-28 14:53:14.000000000 +0000 @@ -1 +1 @@ -This is an umbrella task for all tasks in MariaDB 5.3 + -=-=(Psergey - Sun, 28 Feb 2010, 14:53)=-=- Title modified. --- /tmp/wklog.93.old.21988 2010-02-28 14:53:03.000000000 +0000 +++ /tmp/wklog.93.new.21988 2010-02-28 14:53:03.000000000 +0000 @@ -1 +1 @@ -MariaDB 5.3 +Unused DESCRIPTION: ESTIMATED WORK TIME ESTIMATED COMPLETION DATE ----------------------------------------------------------------------- WorkLog (v4.0.0)

1 0