Re: pg_autovacuum w/ dbt2

Mark Wong <markw(at)osdl(dot)org> writes:
> On Tue, Dec 21, 2004 at 02:23:41PM -0500, Tom Lane wrote:
>> Mark Wong <markw(at)osdl(dot)org> writes:
>>> [2004-12-20 15:48:18 PST] The error is [ERROR: failed to re-find parent key in "pk_district"
>>
>> Yikes. Is this reproducible?

> Yes, and I think there is one for each of the rollbacks that are
> occuring in the workload. Except for the 1% that's supposed to happen
> for the new-order transaction.

Well, we need to find out what's causing that. There are two possible
sources of that error (one elog in src/backend/access/nbtree/nbtinsert.c,
and one in src/backend/access/nbtree/nbtpage.c) and neither of them
should ever fire.

If you want to track it yourself, please change those elog(ERROR)s to
elog(PANIC) so that they'll generate core dumps, then build with
--enable-debug if you didn't already (--enable-cassert would be good too)
and get a debugger stack trace from the core dump.

Otherwise, can you extract a test case that causes this without needing
vast resources to run?

regards, tom lane