Unfortunately we already use ext2 and noatime, but thanks for the suggestion. -=Kevin=- -----Original Message----- From: Mike Rambo [mailto:mrambo@xxxxxxxxxxxxx] Sent: Tuesday, June 27, 2006 9:33 AM To: Squid Users List Subject: Re: RE: Increased service times using aufs vs diskd O'Brien, Kevin wrote: > No takers? > > The other interesting thing is that the service times increase as > traffic decreases. Any theories on that? > > -=Kevin=- > > _____________________________________________ > Sent: Thursday, June 22, 2006 1:22 PM > To: 'squid-users@xxxxxxxxxxxxxxx' > Subject: Increased service times using aufs vs diskd > > I'm using squid as an accelerator and I switched my cache_dir from diskd > (used because server is SMP) to aufs because of various bugs in the > diskd code (761, 1500). However, when I make the switch (and clear the > cache_dir contents) the overall, hit, miss, and near miss service times > increase by almost 10 times. Using diskd, the 24 hour average for > overall, hit, and near miss is 4ms and near miss is 1ms. After the > switch, the times rocket up to 44ms, 43ms, 49ms, and 45ms for overall, > hit, miss, and near miss. I am wondering if this is just a function of > the squid process now handling disk requests or is an indication of > another problem (although ~40ms is probably not much of a problem). > > Here's the details of the system: > OS: RHEL4 > Squid: 2.5.stable14 with epoll patch > Build options: ./configure --enable-epoll --enable-snmp > --enable-removal-policies=heap,lru --enable-storeio=aufs,diskd,ufs > --with-pthreads --enable-cachemgr-hostname=localhost > --disable-ident-lookups --enable-truncate --enable-cache-digests > --enable-htcp > <snip> I didn't see what filesystem you are using. Changing from ext3 to ext2 and setting noatime on the cache_dir disks helped us in this circumstance. -- Mike Rambo mrambo@xxxxxxxxxxxxx Many today claim to be tolerant. True tolerance, however, can cope with others being intolerant. -Nigel Cunningham
