Bug 3672

Summary:	Performance bugs in syslogd and klogd
Product:	[Retired] Red Hat Linux	Reporter:	mch
Component:	sysklogd	Assignee:	Bill Nottingham <notting>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.0	CC:	mch, rvokal
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	1999-09-05 16:58:15 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description mch 1999-06-23 15:03:21 UTC

Hello.

Both syslogd and klogd take much cpu (>10%) without much
output to the log files.

Is there a newer version of sysklogd, or do you know
of any fixes to /etc/syslog.conf that fixes this problem
(i'm using /etc/syslog.conf from RH6.0/x86).

/Magnus

Comment 1 Jay Turner 1999-06-23 15:14:59 UTC

Unable to find this on any of our servers, but am forwarded it to a
developer for further review.

Comment 2 Bill Nottingham 1999-07-26 19:54:59 UTC

Does turning off syncing the file help at all?

Comment 3 mch 1999-07-27 07:52:59 UTC

Haven't tried that. The weird thing is that there isn't much logging
activity going on (less than 100 entries per day in messages and
hardly any entries at all in the other log files). The problem only
shows up when the machine is heavily loaded (load avg well over 1 for
long periods of time).

This problem has been discussed on the linux kernel mailing list, and
I was just wondering if you guys had a fix for it.

Thanks,

Magnus

Comment 4 mch 1999-08-02 10:06:59 UTC

I've tested turning off syncing now, and it does not help.

/Magnus

Comment 5 Jeff Johnson 1999-09-05 16:58:59 UTC

I see no way to address this request without some idea of what
the cause of the cpu usage is. AFAICT, it's quite possible for
syslogd to receive messages, possibly multiple times a second,
that, because of the configuration in /etc/syslog.conf, are simply
discarded. Please reopen this bug if you have specific suggestions
to reduce cpu usage.