Hi!
On 1 Jun 2014, at 17:37, s.kelly(a)pivotaltechnologies.com.au wrote:
> I have recently moved from an older version of Mysql to MariaDB, I have a few queries which use internal tmp tables (according to EXPLAIN) and the performance is almost un-usable on MariaDB for some reason.
> Is there anything different in MariaDB that would be causing this issue. The version I am using is: Ver 15.1 Distrib 10.0.10-MariaDB.
>
What are your aria engine settings in my.cnf out of curiosity?
Try setting join_cache_level = 0
Please also provide @@optimizer_switch output
Thanks
P/S: what was the older version of mysql that you're referring to?
> Here is the explain from the query:
> +------+-------------+-------+-------+---------------+----------+---------+------+------+-------------------------------------------------------------------------------+
> | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
> +------+-------------+-------+-------+---------------+----------+---------+------+------+-------------------------------------------------------------------------------+
> | 1 | SIMPLE | plots | range | plot_IDX | plot_IDX | 4 | NULL | 2939 | Using index condition; Using temporary; Using filesort |
> | 1 | SIMPLE | plots | range | plot_IDX | plot_IDX | 4 | NULL | 2939 | Using index condition; Using where; Using join buffer (flat, BNL join) |
> | 1 | SIMPLE | plots | range | plot_IDX | plot_IDX | 4 | NULL | 2939 | Using index condition; Using where; Using join buffer (incremental, BNL join) |
> | 1 | SIMPLE | plots | range | plot_IDX | plot_IDX | 4 | NULL | 2939 | Using index condition; Using where; Using join buffer (incremental, BNL join) |
> | 1 | SIMPLE | plots | range | plot_IDX | plot_IDX | 4 | NULL | 2939 | Using index condition; Using where; Using join buffer (incremental, BNL join) |
> | 1 | SIMPLE | plots | range | plot_IDX | plot_IDX | 4 | NULL | 2939 | Using index condition; Using where; Using join buffer (incremental, BNL join) |
> +------+-------------+-------+-------+---------------+----------+---------+------+------+-------------------------------------------------------------------------------+
>
> To give you an idea, the exact same query on the old version of mysql took about 1 second, this version of MariaDB is taking 1min 48secs on the same hardware.
> Any help would be appreciated.
>
> Thanks Steve.
>
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--
Colin Charles, Chief Evangelist, SkySQL - The MariaDB Company
blog: http://bytebot.net/blog/| t: +6-012-204-3201 | Skype: colincharles
Hi guys, i was testing mariadb-galera and checked that query cache is
disabled with galera
Is it ok or i'm doing something wrong?
--
Roberto Spadim
SPAEmpresarial
Eng. Automação e Controle
