Hi, On 2023-01-27 23:18:39 -0500, Tom Lane wrote: > I also saw it on florican, which is/was an i386 machine using clang and > pretty standard build options other than > 'CFLAGS' => '-msse2 -O2', > so I think this isn't too much about machine architecture or compiler > flags.
Ah. Florican dropped of the BF status page and I was too lazy to look deeper. You have a penchant for odd architectures, so it didn't seem too crazy :) > Machine speed might matter though. elver is a good deal faster than > florican was, and dikkop is slower yet. I gather Thomas has seen this > only once on elver, but I saw it maybe a dozen times over a couple of > years on florican, and now dikkop has hit it after not so many runs. Re-reading the old thread, it is interesting that you tried hard to reproduce it outside of the BF, without success: https://postgr.es/m/2398828.1646000688%40sss.pgh.pa.us Such problems are quite annoying. Last time I hit such a case was https://postgr.es/m/20220325052654.3xpbmntatyofau2w%40alap3.anarazel.de but I can't see anything like that being the issue here. Greetings, Andres Freund
