Sasha Pachev wrote:
Cliff wrote:
The query is running dramatically slower than the MyISAM query,
sometimes
even causing mysql to freeze for a while. I searched this list and
found a
few people saying that on FreeBSD mysql should be compiled using linux
pthreads if you are using InnoDB or else I would get this exact
problem. Has
this been resolved or is should I recompile? I am using native freebsd
threads.
Compare the output of EXPLAIN for both MyISAM and InnoDB. Also, if you
have a Linux or even Windows system around, test the same query on
them to see if there is any difference.
I am not that familiar with FreeBSD, but from what I've seen, I would
tend to use the approach "when in doubt, use LinuxThreads". The advice
you've got does make sense - InnoDB runs a number of background
threads, so if your thread implementation is lacking, it would hurt
InnoDB more than MyISAM.
FreeBSD's thread library is a user-space setup. This can result in major
performance issues when doing things that block.
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