"Bjoern Metzdorf" <bm@turtle-entertainment.de> writes:
> It all looked good, but no, the problem persists.
> 5 minutes ago I did a
> "select ctid,* from table order by id limit 82000"
> and it worked flawlessly.
> Then I did a
> "select ctid,* from table order by id limit 200000"
> and it crashed again.
> I again tried
> "select ctid,* from table order by id limit 82000"
> and it crashed here also.
> What do you suspect here? Hardware failure?
Given the above facts, that's what I suspect. You may have something
like a disk controller that sometimes passes bad data. Or a bad RAM
chip that sometimes drops bits. If it weren't a flaky-hardware kind
of thing I'd expect the results to be reproducible.
> I ran a badblocks read-only test
> and it was fine. I tested memory with memtester and it was fine...
Can anyone suggest other diagnostic tools to try? I don't think either
of the above tests would be likely to notice a disk controller that
sometimes returns wrong data, for example.
regards, tom lane
