Hi all, Okay I've done some of what you requested, and unfortunately failed to find anything specific. I can pretty much guarantee the times at which the requests will slow down now. 600RPS = 15 minutes, 800 RPS = 11 minutes, 400 RPS = ~80 minutes. During that time (before and during the problem) systat -vmstat 1 shows the same interrupts - about 4000 on em1 (ifac) and 250 on hptmv0 - my controller for the SATA drives. If I use a systat -iostat 1 I can see that none of the drives are 100% utilized at any time during the test. Systat -tcp 1 also doesn't show me anything out of the ordinary. I have setup munin to monitor the host but unfortunately its not showing much. Also the problem is that when the problem begins, it starts filling up network connections - once it fills all the available ports nothing can monitor it :/ I'm going to try use a different network card, then a different motherboard etc - try some different setups today. Thanks again for all the help and please let me know if anyone has any ideas... Thanks Dave -----Original Message----- From: Adrian Chadd [mailto:adrian@xxxxxxxxxxxxxxx] Sent: Friday, November 09, 2007 4:08 AM To: Dave Raven Cc: squid-users@xxxxxxxxxxxxxxx Subject: Re: Squid Performance (with Polygraph) On Thu, Nov 08, 2007, Dave Raven wrote: > Hi Adrian, > What would cause it to fail after a specific time though - if the cache_mem > is already full and its using the drives? I would have thought it would fail > immediately ? > > Also there are no log messages about failures or anything... Who knows :) its hard without having remote access, or lots of logging/ statistics to correlate the trouble times with. Try installing munin and graph all the system-specific stuff. See what correlates against the failure time. You might notice something, like out of memory/paging, or an increase in interrupts, or something. ;) Thats all I can offer at the present time, sorry. Adrian -- - Xenion - http://www.xenion.com.au/ - VPS Hosting - Commercial Squid Support - - $25/pm entry-level VPSes w/ capped bandwidth charges available in WA -
