From: Jan-Peter Seifert <Jan-Peter.Seifert@gmx.de>
To: pgsql-admin@postgresql.org
Subject: out of memory ...
Date: Mon, 03 May 2010 13:15:56 +0200
Message-ID: <20100503111556.18910@gmx.net> (raw)
Hello,
how fatal is it for the server/data if a server runs out of memory?
Happened on a Windows server some time ago. A transaction got too large. In the log it began with:
------------
TopMemoryContext: 37171728 total in 4046 blocks; 67640 free (4060 chunks); 37104088 used
TopTransactionContext: 24576 total in 2 blocks; 18848 free (17 chunks); 5728 used
CurTransactionContext: 8192 total in 1 blocks; 8176 free (1 chunks); 16 used
...
------------
Although all other clients had been closed no new connection was possible to terminate the session responsible for the out of memory problem. I guess it's because this transaction had been started by a superuser ...
------------
In the end the server was shut down via the service manager.
On the next start of the server the log contained the following lines:
------------
LOG: database system was interrupted; last known up at 2010-03-26 11:22:36 CET
LOG: database system was not properly shut down; automatic recovery in progress
LOG: record with zero length at 1F/D2454CD0
------------
The data still seemed to be okay - all the other transactions made before seem to be in the database.
Is it okay to continue using the database(s) or is there a risk of hidden data corruption (fsync is on)?
Could you tell me, please?
Thank you very much,
Peter
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To: pgsql-admin@postgresql.org
Cc: Jan-Peter.Seifert@gmx.de
Subject: Re: out of memory ...
In-Reply-To: <20100503111556.18910@gmx.net>
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