February 2012
Intermediate to advanced
266 pages
8h
English
Content preview from MySQL TroubleshootingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Haste Makes Waste
This popular English proverb has an equivalent in many other languages. Russians have one that can be translated literally as “sliding slowly, arriving further.” I think this wisdom is good when you tune the MySQL server too, at least when you are not 100% sure what you are doing.
Unless you are 100% sure what is wrong, add options one by one, and then test the configuration each time.
This means that if you think some set of options can make the MySQL server’s behavior better for your application, change one option first, then test, and then, if you are happy with the result, add another option, and so on, until you have checked every relevant option. This can appear slow, but if something goes wrong, you can safely roll back the most recent change and quickly return your server to a working stage.
This method is especially important when you adjust buffers or other options that limit hardware resources, but can be used for options that change server behavior as well. Even with a good knowledge of what variables are doing, it is much easier to find and fix a single mistake than find out what is wrong in dozens of options.
Warning
When using this method, save the results of every test. For example, if you are working on improving performance, run benchmarks or measure query execution time before changing anything, and then repeat the same test after modifying each option.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.