Alvaro Herrera <alvherre@commandprompt.com> writes:
> Zdenek Kotala wrote:
>> Just a confirmation that Alvaro's patch+ReleasePostmasterChildSlot() fix
>> solves the problem and PostgreSQL survives well during a memory
>> shortages.
> So this patch would do it.
Looks good to me, but I think you should also increase the avlauncher
delay from 100ms -> 1s as Zdenek suggested.
> I think this stuff about postmaster child slots is later than
> launcher/worker split. I don't recall seeing it before.
Yeah, I added that recently to try to detect postmaster children
that exit without cleaning up properly. I seem to have missed this
error case :-(. Actually it looks like fork failure for regular
backends gets it wrong too :-( :-( --- would you please also add one
in the pid<0 path in BackendStartup? I think this logic is in 8.4
too, in which case it'll need to be back-patched.
regards, tom lane
