Re: [squid-users] Squid Scalability

Hi, Here are the results for 2 of our squid servers with the highiest use. One is 2.6 and the other is 2.7 they all use AUFS with JBOD ext2, rw,notatime. I will upgrade the 2.6 to 2.7 this week so we can see the change. Version 2.7.STABLE6 Quad-Core CPU Intel(R) Xeon(R) CPU L5420 @ 2.50GHz RAM 8 GB HDD 3x SAS,Fujitsu,147Gb,15K OS RHEL4 AS U7 64bit – 2.6.9-78.0.13.ELsmp Users 57 RPS 166.95 Request Hit Ratio 51.7%, 51.3% CPU Usage: 7.18% CPU Usage, 5 minute avg: 4.33% CPU Usage, 60 minute avg: 3.97% Version 2.6.STABLE21 Quad-Core CPU Intel(R) Xeon(R) CPU L5420 @ 2.50GHz RAM 8 GB HDD 3x SATA,147Gb,7200K OS RHEL4 AS U6 64bit – 2.6.9-67.ELsmp Users 15 RPS 262.3 Request Hit Ratio 74.2%, 73.7% CPU Usage: 7.90% CPU Usage, 5 minute avg: 10.45% CPU Usage, 60 minute avg: 10.21% Quin --- On Mon, 4/6/09, Amos Jeffries <squid3@treenet.co.nz> wrote: > From: Amos Jeffries <squid3@treenet.co.nz> > Subject: Re: [squid-users] Squid Scalability > To: "Gavin McCullagh" <gavin.mccullagh@gcd.ie> > Cc: squid-users@squid-cache.org > Date: Monday, April 6, 2009, 9:04 AM > Gavin McCullagh wrote: > > Hi, > > > > On Sat, 04 Apr 2009, Amos Jeffries wrote: > > > >> For now what we need are the hit/miss ratios and > user numbers from Squid  under peak load, and a few > other details to guide comparisons. > >> > >>   http://wiki.squid-cache.org/KnowledgeBase/Benchmarks > >> details what we are looking for right now and > where to locate it. > > > > Here's our current situation: > > > > > -------------------------------------------------------- > > Version: 2.6.STABLE18 (Ubuntu Hardy Package) > > OS: 32-Bit Ubuntu GNU/Linux (Hardy) > > CPU: Dual Core Intel(R) Xeon(R) CPU  3050  @ > 2.13GHz > > RAM: 8GB > > HDD: 2x SATA disks (150GB, 1TB) > > Cache: 1x 600GB > > Users: ~3000 > > RPS: 130 > > Hit Ratio: 35-40% > > Byte Hit Ratio: ~13% > > > > Submitted by: Gavin McCullagh, Griffith College > Dublin > > With this hit ratio and cache size, substantial cpu > time is spent in iowait > > as the disk is overloaded.  Reducing the cache to > 450GB relieves this, but > > the hit rate drops to more like 10-11%. > > > -------------------------------------------------------- > > > > I'm going to put a second 1TB disk in to replace the > 130GB and have a > > second large cache_dir so this should improve. > > > > Gavin > > > > Thank you. Added. > What sort of CPU load does it run under? > And being linux is it running AUFS cache_dir? > > Amos > -- Please be using >   Current Stable Squid 2.7.STABLE6 or 3.0.STABLE13 >   Current Beta Squid 3.1.0.6 >
Received on Mon Apr 06 2009 - 12:19:25 MDT