I've been trying to track down the culprit of erratic behaviour and crashes on my production server (which is split into a number of Xen instances), so set up a staging server so that I could really try to get to the bottom of it.
The staging server (also split with Xen) is set up pretty much identically as far as the mongrel_cluster server is concerned (the production box has two servers/instances for mongrel_cluster each with 4 mongrels per cluster vs one server on the staging box with 2 mongrels per cluster -- otherwise they are the same: both Debian Etch, same gems, same Ruby - 1.8.5, same mongrel versions - 1.0.1, same mongrel_cluster - 1.0.2). Oh, and the data on the staging one is a clone of the production one. On the production box, pretty much immediately (and I'm talking about within one or two requests), the mongrels climb up to about 150-160MB. One the staging server, even when I'm hammering it with a benchmarking suite (have tried with httperf, and bench and crawl) the mongrels sit comfortably at about 60MB each. Here's some stats from top: Production server: top - 08:38:43 up 22 days, 13:21, 1 user, load average: 0.24, 0.23, 0.15 Tasks: 33 total, 3 running, 30 sleeping, 0 stopped, 0 zombie Cpu(s): 16.6%us, 24.5%sy, 0.0%ni, 51.0%id, 0.0%wa, 0.0%hi, 3.6%si, 4.3%st Mem: 524288k total, 384528k used, 139760k free, 1576k buffers Swap: 262136k total, 1352k used, 260784k free, 19644k cached and from ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND mongrel 20387 2.6 18.5 148780 97228 ? Sl 08:36 0:11 /usr/bin/ruby1.8 /usr/bin/mongrel_rail mongrel 20390 2.8 19.4 153396 101940 ? Sl 08:36 0:13 /usr/bin/ruby1.8 /usr/bin/mongrel_rail mongrel 20393 4.1 19.6 154356 102936 ? Sl 08:36 0:18 /usr/bin/ruby1.8 /usr/bin/mongrel_rail mongrel 20396 4.7 18.8 150124 98576 ? Rl 08:36 0:21 /usr/bin/ruby1.8 /usr/bin/mongrel_rail And here's the corresponding staging server ones: top - 10:00:55 up 15:22, 1 user, load average: 0.00, 0.01, 0.15 Tasks: 29 total, 2 running, 27 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 0.0%sy, 0.0%ni, 99.0%id, 0.0%wa, 0.0%hi, 0.0%si, 1.0%st Mem: 262336k total, 203064k used, 59272k free, 1156k buffers Swap: 262136k total, 4k used, 262132k free, 58636k cached USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND mongrel 3617 7.2 16.8 58808 44296 ? Sl 09:28 2:28 /usr/bin/ruby1.8 /usr/bin/mongrel_rail mongrel 3620 7.1 16.7 58424 43912 ? Sl 09:28 2:26 /usr/bin/ruby1.8 /usr/bin/mongrel_rail Anybody got any suggestions, or at least thoughts on tracking down the issues? Thanks, Chris -- ---------------------------- Autopendium :: Stuff about old cars http://autopendium.com _______________________________________________ Mongrel-users mailing list Mongrel-users@rubyforge.org http://rubyforge.org/mailman/listinfo/mongrel-users
