Dear All, I have installed Moodle version 1.8 and am facing problems whereby the server resources are bring consumed within seconds. Each page request through http is consuming between 20 and 35 MB RAM. The server works well for loads of approximately 20 users but at 25 or 30 it just crashes and I need to restart the httpd process. Current setup is Fedora Core 5 (Apache 2.2.0) with 512 MB of memory. Looking at TOP, I see that apache is not recycling it's memory (each process takes up between 1 and 6% and even though it's been idle for some time it does not seem to recycle it. Memory then stays at about 500MB until such time as I restart the service and it drops to 230MB (I currently restart the service hourly which very often fails). A snapshot of my process list is as follows: top - 15:46:56 up 4:15, 2 users, load average: 0.00, 0.03, 0.02 Tasks: 91 total, 1 running, 90 sleeping, 0 stopped, 0 zombie Cpu(s): 0.2% us, 0.0% sy, 0.0% ni, 99.8% id, 0.0% wa, 0.0% hi, 0.0% si Mem: 504156k total, 474812k used, 29344k free, 28988k buffers Swap: 1534196k total, 0k used, 1534196k free, 92952k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4991 apache 16 0 43292 20m 4436 S 0 4.1 0:01.37 httpd 4992 apache 15 0 52168 29m 4520 S 0 5.9 0:02.11 httpd 4993 apache 15 0 43148 20m 4320 S 0 4.1 0:01.25 httpd 4994 apache 15 0 43140 20m 4396 S 0 4.1 0:01.82 httpd 4995 apache 16 0 43484 21m 5388 S 0 4.3 0:01.66 httpd 4996 apache 17 0 48540 26m 5428 S 0 5.4 0:02.57 httpd 4997 apache 15 0 47844 24m 4376 S 0 5.0 0:02.31 httpd 4998 apache 15 0 43260 20m 4360 S 0 4.1 0:01.70 httpd 4999 apache 15 0 60444 37m 4496 S 0 7.5 0:02.38 httpd 5000 apache 15 0 60624 37m 4560 S 0 7.6 0:09.21 httpd 5001 apache 16 0 50868 27m 4412 S 0 5.6 0:06.82 httpd 5002 apache 15 0 43148 20m 4380 S 0 4.1 0:01.89 httpd 5003 apache 16 0 50868 27m 4412 S 0 5.6 0:01.58 httpd 5004 apache 15 0 43284 20m 4368 S 0 4.1 0:00.55 httpd 5005 apache 16 0 50980 27m 4412 S 0 5.6 0:02.21 httpd 5112 apache 15 0 43248 19m 4148 S 0 4.0 0:00.47 httpd I have been tweaking around with the conf file and this is what I currently have: KeepAlive On # # MaxKeepAliveRequests: The maximum number of requests to allow # during a persistent connection. Set to 0 to allow an unlimited amount. # We recommend you leave this number high, for maximum performance. # MaxKeepAliveRequests 100 # # KeepAliveTimeout: Number of seconds to wait for the next request from the # same client on the same connection. # KeepAliveTimeout 5 ## ## Server-Pool Size Regulation (MPM specific) ## # prefork MPM # StartServers: number of server processes to start # MinSpareServers: minimum number of server processes which are kept spare # MaxSpareServers: maximum number of server processes which are kept spare # ServerLimit: maximum value for MaxClients for the lifetime of the server # MaxClients: maximum number of server processes allowed to start # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule prefork.c> StartServers 15 MinSpareServers 10 MaxSpareServers 20 ServerLimit 512 MaxClients 512 MaxRequestsPerChild 4000 </IfModule> # worker MPM # StartServers: initial number of server processes to start # MaxClients: maximum number of simultaneous client connections # MinSpareThreads: minimum number of worker threads which are kept spare # MaxSpareThreads: maximum number of worker threads which are kept spare # ThreadsPerChild: constant number of worker threads in each server process # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule worker.c> StartServers 10 MaxClients 256 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 75 MaxRequestsPerChild 4000 </IfModule> I have read the Moodle docs on Apache performance, googled and read the Apache website for the past week without siginificant improvements when changing these variables. I also am aware of the significant resources that Moodle consumes, but would hope that it could at least support 30 users. I have tried doubling max open files to 100k. (/proc/sys/fs/file-max) If someone could assist in pointing me in any direction I would greatly appreciate it. Kind Regards, Terence --------------------------------------------------------------------- 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
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