Steve Hay wrote:
If I switch to mp2 then the Perl interpreter is now multi-threaded, thus removing the performance bottleneck, which should be great except for one thing: All our mp code involves DBI (& DBD-mysql), but DBI is not thread-safe!
I thought DBI was thread-safe at this point. It's more likely DBD::mysql that is not.
DBD::mysql is thread-safe, if the underlying libmysql is (see DBD::mysql POD). Under Unix, a thread-safe libmysql_r needs to be compiled and linked (not done by default), under Windows, it should always be thread-safe.
While I can reproduce the crash with Steve's small script, I haven't had any problems with DBI and DBD::mysql under either WinNT or Worker MPMs in real life.
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