Lee Marzke on 25 Sep 2006 19:53:51 -0000


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Re: [PLUG] Redhat EL3 and ulimit

Michael Bevilacqua wrote: 
Zope on my RHEL3 server likes to use as much memory as possible. I
would like to limit the amount of memory it uses to 32M. So within
/etc/security/limits.conf I added the following:

zope            hard    rss             32000
@zope           hard    rss             32000

and tested it:

[root@server1 root]# su -l zope
-bash-2.05b$ ulimit -a | grep "max memory"
max memory size       (kbytes, -m) 32000

But then according to top(1) some time later, it shows that it went
over the limit I set:

[root@server1 root]# top -b -n 1 | grep zope
2917 zope 15 0 62352 58M 2344 S 0.0 3.9 0:58 0 python2.3
2928 zope 15 0 31712 30M 2148 S 0.0 2.0 0:14 0 python2.3


Did I miss something when setting up ulimit's hard max memory limit?



Not sure you can do much with Zope and 32M.     I have 1 medium sized
site,  and 2 or 3 very small ones under Zope and it's using 181M resident
( I  have both Zeo and Zope  running as well as Cache-Fu which speeds
up page requests by 20x or so. )

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2599 zope 16 0 232m 181m 8352 S 0.0 38.3 4:50.51 python2.3

You can always run ZEO on your main server,  and use a separate disk-less or
minimally installed machine for serving Zope that has a fast CPU and RAM to
move the RAM requirement elsewhere.   I'm running ZEO and Zope on the
same box for testing,  and possible expansion to separate boxes later.

Lee Marzke






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