On 13 January 2021 20:04:10 EET, Heikki Linnakangas <hlinn...@gmail.com> wrote: > > >On 13 January 2021 13:53:39 EET, Heikki Linnakangas <hlinn...@iki.fi> wrote: >>Looks like the LSN on the page is not set to GistBuildLSN as expected. >>Weird. >> >>Thorntail is a sparc64 system, so little-endian, but the other >>little-endian buildfarm members are not reporting this error. Any idea >>what might be going on? > >Status update on this: I am building Postgres in a qemu sparc64 emulated >virtual machine, hoping to be able to reproduce this. It's very slow, so it >will take hours still to complete. > >I don't think this is a problem with the test, or with the new pageinspect >functions, but a genuine bug in the gist building code. Or there is something >special on that animal that causes the just-created index pages to be dirtied. >It does seem to happen consistently on thorntail, but not on other animals.
Ah, silly me. Thorntail uses "wal_level=minimal". With that, I can readily reproduce this. I'm still not sure why it happens, but now it should be straightforward to debug. - Heikki
