Tom Lane 2cd4e83570 Fix contrib/auto_explain to not cause problems in parallel workers. ... A parallel worker process should not be making any decisions of its own about whether to auto-explain. If the parent session process passed down flags asking for instrumentation data, do that, otherwise not. Trying to enable instrumentation anyway leads to bugs like the "could not find key N in shm TOC" failure reported in bug #15821 from Christian Hofstaedtler. We can implement this cheaply by piggybacking on the existing logic for not doing anything when we've chosen not to sample a statement. While at it, clean up some tin-eared coding related to the sampling feature, including an off-by-one error that meant that asking for 1.0 sampling rate didn't actually result in sampling every statement. Although the specific case reported here only manifested in >= v11, I believe that related misbehaviors can be demonstrated in any version that has parallel query; and the off-by-one error is certainly there back to 9.6 where that feature was added. So back-patch to 9.6. Discussion: https://postgr.es/m/15821-5eb422e980594075@postgresql.org		2019-06-03 18:06:04 -04:00
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auto_explain.c	Fix contrib/auto_explain to not cause problems in parallel workers.	2019-06-03 18:06:04 -04:00
Makefile	Add file version information to most installed Windows binaries.	2014-07-14 14:07:52 -04:00