If you're running SATA then it could just be a crappy ATA chipset. you should see how much time you're spending in iowait and whether that correlates with your "D" processes. Adrian 2008/7/17 Richard Hubbell <richard_hubbe11@xxxxxxxxx>: > > > > --- On Wed, 7/16/08, Rhino <rhino@xxxxxxxxxxxx> wrote: > >> From: Rhino <rhino@xxxxxxxxxxxx> >> Subject: Re: [Fwd: Re: Recommended cache_dir config for large system] >> To: richard_hubbe11@xxxxxxxxx >> Cc: squid-users@xxxxxxxxxxxxxxx >> Date: Wednesday, July 16, 2008, 6:55 PM >> Richard Hubbell wrote: >> > >> > --- On Wed, 7/16/08, Rhino <rhino@xxxxxxxxxxxx> >> wrote: >> > >> > >> >> From: Rhino <rhino@xxxxxxxxxxxx> >> >> Subject: Re: [Fwd: Re: Recommended >> cache_dir config for large system] >> >> To: richard_hubbe11@xxxxxxxxx >> >> Cc: squid-users@xxxxxxxxxxxxxxx >> >> Date: Wednesday, July 16, 2008, 2:53 PM >> >> Richard Hubbell wrote: >> >> >> >>>> THanks much for the quick response, >> Henrik. >> >>>> Filesystem for cache disks currently >> configured >> >>>> >> >> for >> >> >> >>>> reiserfs with >> >>>> notail/noatime opts. >> >>>> I did not have the fd amounts set, nor >> >>>> >> >> ip_local_port_range. >> >> >> >>>> My cache_dirs have each disk mounted as >> partition, >> >>>> >> >> i.e. >> >> >> >>>> disk1=/squid1 >> >>>> disk2=/squid2; would your suggestion >> >>>> be then to halve each disk and partition >> each as >> >>>> >> >> cache_dir? >> >> >> >>>> (i.e, go >> >>>> from squid1-4 to squid1-8 across the 4 >> disks) >> >>>> Also have a 5th disk of equal size that >> has to be >> >>>> >> >> used for >> >> >> >>>> OS, just fyi >> >>>> - so these 4 are totally dedicated to >> Squid. >> >>>> thanks again, appreciate your input. >> >>>> -Ryan >> >>>> >> >>> Just curious why reiserfs? I don't think >> it's >> >>> >> >> supported any longer. >> >> >> >>> >> >>> >> >>> >> >>> >> >>> >> >> size/speed considerations when we set the system >> up >> >> originally. It's >> >> worked well so far. >> >> cheers >> >> >> > >> > Okay, do you mean better performance with larger >> number of files? >> > I'm using ext3 that's why I'm asking. >> > >> > >> > >> > >> > >> > >> > >> we went with the reiserfs out of googling the choices and >> most impressed >> with what we found on it as opposed to ext3. >> we're also using sata drives, if that helps; just hoped >> for the best >> combination once the server was in production. >> I'm not suggesting this is in fact the optimum >> combination - I'm no >> linux or filesystem expert by any means. >> Just trying to keep our customers happy and my paycheck >> coming :) >> -Ryan > > Yep, no problem. We're using ext3 on redhat since that's what's supported. Always good to hear/learn from others' experience. > > We've seen some issues with processes spending a litte too much time in "D" state (as reported by ps) a.k.a. uninteruptible sleep. Not clear what is causing that yet. Seems like a deadlock somewhere. Not in squid. We saw it in apache and others. > > > > >
