Check netstat -mb and see if you're running out of mbufs? You haven't mentioned whether the CPU is being pegged at this point? Adrian On Fri, Nov 09, 2007, Dave Raven wrote: > 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 - -- - Xenion - http://www.xenion.com.au/ - VPS Hosting - Commercial Squid Support - - $25/pm entry-level VPSes w/ capped bandwidth charges available in WA -
