It's probably DBD::Oracle or the OCI code it loads that is not safe. Regardless, using threads here is a bad idea. Perl threads are currently slower than forked processes, in addition to being less safe. You have nothing to gain by using threads.

In reply to Re: Threading (Perl 5.8 ithreads) with Oracle 9i dumps core by perrin
in thread Threading (Perl 5.8 ithreads) with Oracle 9i dumps core by fx

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