Hi All, Can you tell me what is the output you get when you run the free -m command.Also when the process is idle it won't release the memory back.I guess it will be put in the Swap space of OS.top -p pid won't be coming down.
Also I see from the configuration file both perfork and worker is being used is it so?I am not clear about the configuration.Are you getting any crash on the Apache? Thanks -A On Mon, Apr 21, 2008 at 1:21 PM, Terence Le Grange <[EMAIL PROTECTED]> wrote: > 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: [EMAIL PROTECTED] > " from the digest: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
