Am Dienstag 01 Juli 2008 20:16:15 schrieb Skye Poier Nott: > I want to deploy Varnish with very large cache sizes (200GB or more) > for large, long lived file sets. Is it more efficient to use large > swap or large mmap in this scenario? > > According to the FreeBSD lists, even 20GB of swap requires 200MB of > kern.maxswzone just to keep track of it, so it doesn't seem like that > will scale too well. Is one or the other method better for many > small files vs less many big files? > > Thanks again... when I'm a Varnish expert I'll help the newbs :) > > Skye
I'm administrating three varnish instances for static images; cache file is setup as 517 GB (pre allocated with "dd"); currently, after 35 days uptime, it's filled more than half: 305543155712 bytes allocated 248759787520 bytes free It's running on Debian etch, 2x dual-core amd opteron, 32 GB RAM, 30 GB swap: Mem: 32969244k total, 32870944k used, 98300k free, 120672k buffers Swap: 29045480k total, 6096612k used, 22948868k free, 25752752k cached the varnish process looks like this in "top": PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ P COMMAND 3221 username 15 0 522g 27g 21g S 1 87.0 539:33.89 2 varnishd hitrate is 98% for recent short term, overall average is 95%. load of the machines is between 1 and 2 on medium traffic times, and goes up to 3 only seldom. but, the request rate is may be relatively low, compared to what others reported on the list. I don't have hard numbers unfortunately, average is 80.49 according to varnishstat. At peaks the reate may be in the order of may be 400 req/sec for a single instance. We had issues with 1.1.2 crashing, but since running on trunk (r2640), everything runs smooth. response time according to a nagios http response check is between 0.5 - 1 seconds, almost never over 1 second, even at peak times. Hope it's useful for someone, let me know if you need more details. Cheers, Sascha _______________________________________________ varnish-misc mailing list [email protected] http://projects.linpro.no/mailman/listinfo/varnish-misc
