MySQL Persistent Connections

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+2 Q:

MySQL Persistent Connections

I have 10 application servers and 1 mysql database. I would like to do connection pooling for mysql, but simply enabling mysql_pconnect() will not work since it'll cause some servers to have more connections than others.

What's the best solution for this scenario..?

+1 A:

Why do you want to use persistent connections?

They are likely to cause trouble and will not improve performance noticeably (in all likelihood).

Run some performance tests on production-grade hardware in your lab, and you'll see.

MarkR 2010-02-12 16:41:39

When opening thousands of connections over and over, that adds a lot of overhead. Persistent connections will make considerable improvements on the mysql server..

Ian 2010-02-12 17:14:45

@MarkR is correct, see http://groups.google.com/group/comp.databases.mysql/browse_thread/thread/4ae68befe1b488e7/e843f0b9e59ad710?#e843f0b9e59ad710

Bill Karwin 2010-02-12 20:00:02

Ian - do not presume to know how much impact persistent connections makes until you've performance tested on it. We found (when doing production-grade hardware performance measurement) that it made no significant difference.

MarkR 2010-02-13 23:11:41

ansaurus

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