[syslog-ng]syslog-ng performance problem

Hamilton, Andrew Mr RAYTHEON 5 SIG CMD HamiltonA@hq.5sigcmd.army.mil
Tue, 13 Feb 2001 13:10:20 +0100

You need to upgrade to a new version.  This was a well known problem on some
of the earlier 1.4 versions of syslog-ng for some OS's.  Subsequent releases
have cleared this up.  Look at

That is the syslog-ng home page.


> -----Original Message-----
> From:	Santiago Gomez Cano [SMTP:santiago.gomez@tiscalinet.es]
> Sent:	Tuesday, February 13, 2001 12:16 PM
> To:	syslog-ng@lists.balabit.hu
> Subject:	[syslog-ng]syslog-ng performance problem
> Hi
> I'm using the syslog-ng 1.40rc3-3 deb package running on a Debian
> GNU/Linux box collectin logs from 3 different web serves.
> When starting the syslgog-ng daemon it begins using a reasonable CPU
> amount (about 2 or 4%), sleeping most of the time and running when
> someone access our web pages and the logging server receives logs from
> the web servers. The CPU usage increases to 5 or 6% after one hour
> running and keeps on growing up to saturate the server with a 99.99% CPU
> usage about two or three ours after the start. 
> I think the server has enough CPU and memory resources (Pentium III 650
> with 1Gb RAM) to handle the logs incoming from the web servers as it
> works fine at the beginning without loosing messages and the performace
> decreases progressively instead of from the beginning. I think I could
> solve the problem with the appropiate gc_idle_threshold() and
> gc_busy_threshold() settings (now I using the default values), but I'm
> not sure if it would be the solution and in this case I don't know how
> to calculate the right values for these para meters. 
> Any advice?
> -- 
> Santiago Gomez Cano
> Systems Administrator / Administrador de Sistemas
> santiago.gomez@tiscali.es
> Tiscali Telecomunicaciones, S.A.
> www.tiscali.es 
> T. +34 918370546 
> T. +34 699459573
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