On 10/10/2014 04:16 AM, MauMau wrote: > From: "Craig Ringer" <cr...@2ndquadrant.com> >> It'd be interesting and useful to run this test on a debug build of >> PostgreSQL, i.e. one compiled against the debug version of the C library >> and with full debuginfo not just minimal .pdb. > > Although I'm not sure the user can do this now, I'll ask him anyway.
It sounds like they've produced a test case, so they should be able to with a bit of luck. Or even better, send you the test case. >> How were the stacks captured - what tool? > > According to his mail, Windbg or userdump.exe. I'll ask him about this. Thanks. The stack trace looks fairly sane, i.e. there's nothing obviously out of whack at a glance, but I tend to get more informative traces from Visual Studio debugging sessions. Your next step here really needs to be to make this reproducible against a debug build. Then see if reverting the xlog scalability work actually changes the behaviour, given that you hypothesised that it could be involved. As I said off-list, if you can narrow the test case down to something that can be reproduced more quickly, you could also git-bisect to seek the commit at fault. Even if the test case takes an hour, that's still viable: $ git bisect start $ git bisect bad $ git bisect good REL9_3_RC1 Bisecting: a merge base must be tested [e472b921406407794bab911c64655b8b82375196] Avoid deadlocks during insertion into SP-GiST indexes. $ git bisect good Bisecting: 1026 revisions left to test after this (roughly 10 steps) ... Thanks to the magic of binary search. -- Craig Ringer http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers