September 2014
Intermediate to advanced
384 pages
9h 28m
English
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The query cache explained
The query cache stores the queries that have been executed against the server and their results. If a user issues a query that is in the cache, the results are returned immediately. Of course, the server still checks whether the account has the right to execute the query.
How the query cache affects the performance of a server strictly depends on the workload. In many cases, it may even cause a performance loss. It is enabled by default, but the DBA should carefully benchmark the applications with the query cache enabled and disabled to determine whether it is beneficial for the server. The tests should also be periodically repeated if the applications change. It is also possible to activate it on demand, that is, the ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.