From: | "Spiegelberg, Greg" <gspiegelberg(at)isodxsolutions(dot)com> |
---|---|
To: | "Kevin Kempter" <kevin(at)kevinkempterllc(dot)com>, <pgsql-admin(at)postgresql(dot)org> |
Subject: | Re: STDERR vs. SYSLOG logging |
Date: | 2007-05-02 15:20:00 |
Message-ID: | 82E74D266CB9B44390D3CCE44A781ED90B6B07@POSTOFFICE.cranel.local |
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Kevin Kempter sayeth...
>
> Hi List;
>
> Anyone have any thoughts per which logging method (SYSLOG vs
> STDERR) is the
> better approach ?
>
From looking at 8.2.1 source the internal postgres stderr redirect
method only does line buffering which explains why we see a performance
gain when we turn logging off or have it use syslog instead.
Syslog with the '-' option in front of the log file in syslog.conf is a
good option. As I understand it, ulog is also a good option but I
haven't any experience with it.
Logging when the individual log entry is buffered does present a risk of
losing a log entry on a system crash but for the purposes of Postgres I
would think that such a system crash would have been caused by something
external to Postgres and the loss of any logs in this case is okay.
Greg
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