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What is considered a high slow query time?

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  • What is considered a high slow query time?

    Hello All,

    I just wrote my own MySQL slow query log parser in bash for OS X Server. However, I don't really know what is considered a high slow query time. I have roughly 1900 slow queries over the past 2 months that have a query_time range from 20 to 700.

    Thanks in advance!

  • #2
    The configuration variable "long_query_time" sets the threshold for queries getting into this log. You can see your configuration by doing SHOW VARIABLES LIKE 'long_query_time'.

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    • #3
      The question is what is slow for your application? If a user is waiting for a web page to load, a few seconds can be too slow, especially if it's only one of 20 queries that page will execute.

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      • #4
        Thank you for the replies guys!

        All of these queries are mostly loading 1 query per web page and some are taking any where from 20 to 700 seconds. There is obviously a problem here, I just need to do a little more research. Since these are pretty simple searches I would suppose that anything over 5 seconds would be considered a high slow query time for my application.

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