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I'm using MariaDB 10.1. How to get actual query time for all of executed query? It seems that SHOW PROFILES; was deprecated. Is there a better solution for database tuning?

Edit: It's deprecated only in MySQL 5.6.7.

  • i just checked SHOW PROFILES is still present in 10.1.18 – jerichorivera Jan 15 '17 at 12:35
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    @jerichorivera that's true. I'm wrong. It's deprecated only in MySQL 5.6.7. Is there a way to get time of all executed queries (using various drivers)? – x01saa Jan 15 '17 at 12:49
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Set long_query_time=0 and turn on the slowlog to a FILE (in my.cnf, and restart). Then the slowlog will contain a variety of info about every command executed, including the query time.

You might also want to run pt-query-digest to summarize the slow log. This will include min/max/avg/etc for each 'different' query.

  • Wonderful! Thanks. Is there any performance issues with enabling slow_query_log? – x01saa Jan 15 '17 at 17:14
  • The performance impact is pretty small -- one append to file per query. However, in a busy system this could fill up the disk pretty fast. So keep an eye on disk space. You might do this for a day or week, then set long_query_time = 1 do save disk space while catching only the really naughty queries. – Rick James Jan 15 '17 at 17:21

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