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From Markus Wichitill <>
Subject Re: plans for mp2.0.0 release schedule
Date Thu, 02 Dec 2004 17:00:09 GMT
Perrin Harkins wrote:
> 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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