BUG #6696: 9.2beta2 crashed when having shared_buffers>20GB

Lists: pgsql-bugs
From: weixing(dot)sun(at)gmail(dot)com
To: pgsql-bugs(at)postgresql(dot)org
Subject: BUG #6696: 9.2beta2 crashed when having shared_buffers>20GB
Date: 2012-06-16 17:39:29
Message-ID: E1Sfwy9-0000L9-Af@wrigleys.postgresql.org
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Lists: pgsql-bugs

The following bug has been logged on the website:

Bug reference: 6696
Logged by: weixing
Email address: weixing(dot)sun(at)gmail(dot)com
PostgreSQL version: Unsupported/Unknown
Operating system: RHEL6.1
Description:

Hi,

I know this NON-GA version issue could not be placed here, but please let me
know if you have any entries.
Currently , I met a tricky bug of Postgres 9.2beta2 when having > 20GB
buffer pool:
###################################
DETAIL: The postmaster has commanded this server process to roll back the
current transaction and exit,
because another server process exited abnormally and possibly corrupted
shared memory.
HINT: In a moment you should be able to reconnect to the database and
repeat your command.
WARNING: terminating connection because of crash of another server process
################################
Above err msg will fill out my stderr log file, and refuse all the requests
from the middle-tier of running my workload.

Any comments?

Thanks a lot!
Weixing


From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: weixing(dot)sun(at)gmail(dot)com
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #6696: 9.2beta2 crashed when having shared_buffers>20GB
Date: 2012-06-18 15:58:49
Message-ID: 10978.1340035129@sss.pgh.pa.us
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weixing(dot)sun(at)gmail(dot)com writes:
> Currently , I met a tricky bug of Postgres 9.2beta2 when having > 20GB
> buffer pool:

It seems fairly unlikely that having shared_buffers that high is alone
sufficient to cause a crash, if indeed it's even related to the problem.
What were you doing exactly? We need full instructions to reproduce the
failure.

regards, tom lane