What is considered a high slow query time?

MySQL & MariaDB Other MySQL® Questions
1

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! :smiley:

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’.

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.

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.