Hi Dave,
Dave Raven wrote:
I have seen the error messages before, but not during these tests. diskd definitely seems to delay the time-till-crash by a lot - as I understand it the problems in diskd are crashes under high load, not that it slows it down right?
From my experience, YES, DISKD crashes under high load but does not
actually slows Squid down. It slows Squid initially while rebuilding
it's cache after the crash but recovers quite fast not to hamper
performance.
Only under certain circumstances, will it cause the cache to go beyond
repair and the only way out is to wipe out the cache and rebuild it from
scratch.
The time for the DISKD crashes also seems to vary alot from crashing
multiple times a day to a single crash a week or two.
From your earlier posts, since all your testings lasted from 10 minutes
to 18 hours, maybe the DISKD crash did not appear during that time.
Also your FreeBSD version 4.x might have also made the difference!
Can you post your FreeBSD 4.x KERNEL parameters that you compiled for
your testing purposes?
Thanking you...
Thanks for the help
Dave
-----Original Message-----
From: redsnapper8t8@xxxxxxxxx [mailto:redsnapper8t8@xxxxxxxxx] On Behalf Of John Moylan
Sent: Wednesday, November 14, 2007 12:39 PM
To: Dave Raven
Subject: Re: Squid Performance (with Polygraph)
Doesn't diskd have a bug whereby it has issues under heavy load.
http://www.squid-cache.org/bugs/show_bug.cgi?id=761 . If so, I am
surprised that it is behaving best under heavy load.
http://www.squid-cache.org/Versions/v2/2.6/squid-2.6.STABLE16-RELEASENOTES.html
J
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Tek Bahadur Limbu
System Administrator
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Jwl Systems Department
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