Hi I got a problem on a web server running apache 1.3.35 freebsd 5.4 Every now and then the httpd processes all get stuck on RUN state and start piling up eventually causing swapping but when things are normal the server has a lot of free ram and is far from swapping. 2 gig ram and normal use under 1 gig. When they are all in RUN state the server is unresponsive on http or very slow and ssh is fine but a bit slow. The way out is killall -9 httpd and then it usually runs ok for a while again, this behaviour started occuring out of nowhere without me doing anything no config change etc, I suspect a few things, one been mysql since the 2 busiest sites are forums and the other been the hard drive as I noticed weird pauses when doing tasks every now and then even when the server is low load. What also makes me suspect the hd is that cpu usage is often high on system especially when its clogging up, system is often higher then user. Here is a typical top output. last pid: 28474; load averages: 0.47, 0.33, 0.36 up 0+21:15:28 06:57:22 144 processes: 1 running, 143 sleeping CPU states: 0.8% user, 0.0% nice, 0.4% system, 0.4% interrupt, 98.4% idle Mem: 486M Active, 788M Inact, 241M Wired, 91M Cache, 112M Buf, 270M Free Swap: 2048M Total, 52M Used, 1996M Free, 2% Inuse PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND 93241 apache 20 0 110M 69636K lockf 0:15 2.05% 2.05% httpd 56049 apache 20 0 110M 72544K lockf 0:19 1.37% 1.37% httpd 37231 apache 20 0 110M 68764K lockf 0:19 0.93% 0.93% httpd 92245 root 4 15 11220K 10336K kqread 0:28 0.49% 0.49% perl5.8.8 51077 apache 20 0 110M 56552K lockf 0:04 0.49% 0.49% httpd 56293 apache 20 0 110M 73752K lockf 0:22 0.34% 0.34% httpd 4289 root 96 0 30040K 22624K select 1:09 0.29% 0.29% perl 44432 apache 20 0 110M 73012K lockf 0:22 0.29% 0.29% httpd 49998 apache 20 0 114M 76828K lockf 0:22 0.24% 0.24% httpd 49797 apache 20 0 110M 71412K lockf 0:21 0.15% 0.15% httpd 92511 apache 20 0 139M 97804K lockf 0:10 0.10% 0.10% httpd 25367 mysql 20 -5 261M 98408K kserel 10:13 0.05% 0.05% mysqld 31309 apache 20 0 109M 71664K lockf 0:16 0.05% 0.05% httpd 64100 apache 20 0 139M 112M lockf 1:46 0.00% 0.00% httpd 10469 root 96 0 32664K 20860K select 0:39 0.00% 0.00% perl 45354 apache 20 0 110M 76968K lockf 0:23 0.00% 0.00% httpd The only reason swap is in use is because it never flushed fully from the last buildup of processes. My httpd.conf setting for maxclients etc. is as below. Timeout 15 KeepAlive Off MaxKeepAliveRequests 150 KeepAliveTimeout 5 MinSpareServers 8 MaxSpareServers 16 StartServers 8 MaxClients 100 MaxRequestsPerChild 5000 They are not permanent settings it previously has also had much higher Timeout of 60 and Maxrequestsperchild I have tried lower on 50. It is a single cpu machine. Chris --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
|