Comments on: Identifying MySQL slow queries

By: Matthew Ogston

Matthew Ogston — Tue, 02 Feb 2010 00:08:45 +0000

Thanks for this article -it’s helping me debug some serious DB slow downs we’re getting at the moment. I too had the same problem as @neo. I corrected it by using the following command (specifying the path and slow log file):

mysqldumpslow -s t /var/log/mysql-slow.log

By: blestab

blestab — Thu, 23 Jul 2009 10:34:00 +0000

can’t find mysqldumpslow, im using easyphp 2.0 on windows xp. what can i do to get it?

By: killerBird

killerBird — Thu, 25 Jun 2009 22:53:58 +0000

@Marius:my mistake ! permission issues . its alright now ..
but thanks for this advice, now i can run a bash script with your command to get the log file at a specific interval. your article is indeed very helpful. Thanks a lot.
M little confused with the log file syntax , need to know what that count, time, lock, rows means .

By: - Marius -

- Marius - — Thu, 25 Jun 2009 17:18:46 +0000

@killerBird: not sure why this is happening for your system. You can try to add the logfile to the command line like this:

mysqldumpslow -s c -t 10

By: killerBird

killerBird — Thu, 25 Jun 2009 11:16:05 +0000

Hi ,

While running the “mysqldumpslow” command i am getting the following error:

$ mysqldumpslow -s c -t 10
Can’t find ‘/mnt/data/mysql//*-slow.log’

here is what i got from $ my_print_defaults mysqld
–user=mysql
–pid-file=/var/run/mysqld/mysqld.pid
–socket=/var/run/mysqld/mysqld.sock
–port=3306
–basedir=/usr
–datadir=/mnt/data/mysql/
–tmpdir=/tmp
–language=/usr/share/mysql/english
–skip-external-locking
–bind-address=127.0.0.1
–key_buffer=16M
–max_allowed_packet=16M
–thread_stack=128K
–thread_cache_size=8
–query_cache_limit=1M
–query_cache_size=16M
–log_slow_queries=/var/log/mysql/mysql-slow.log
–long_query_time=2
–log-queries-not-using-indexes
–skip-bdb
–old_passwords=false.

any help will be highly appreciated

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Fri, 13 Feb 2009 10:41:13 +0000

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By: alonso

alonso — Thu, 21 Aug 2008 01:13:12 +0000

The correct way to solve this is to put basedir=/usr under the [mysqld] section.

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