Thomas Hurst wrote:
* Evren Yurtesen ([EMAIL PROTECTED]) wrote:
How do I see what process is sharing memory and how much memory?
Guessing is normally sufficient; typically it's processes with the same
name and similar size/res. On 7-STABLE you can use procstat -v to look
at the VM mappings for a process, but typically that'll be overkill.
Thanks, I will try to check procstat -v when I start seeing the error message
coming. When the system is showing "Approaching the limit on PV entries" is it
related to number of allocations I see in procstat -v output? Is each line an PV
entry? How can one obtain same information from 6.x i386? (just asking to
compare similar systems)
There are a bunch of apache 2.2 processes working normally about 20-30
processes. This box doesnt do much more than that...
I just checked the machine and here is what it looks like:
2:32PM up 18 days, 5:40, 3 users, load averages: 0.41, 0.36, 0.27
web:/root#ps ax |grep http
21429 ?? Ss 0:18.08 /usr/local/sbin/httpd
86473 ?? S 0:00.09 /usr/local/sbin/httpd
86659 ?? S 0:00.09 /usr/local/sbin/httpd
Although I see now that for 2 days the PV entries error did not appear. I
wonder if it is spooling up somehow...
They do look a bit small to be triggering it; assuming they're sharing
most of that, that's still only about 400k pv entries; 5MB or so (12
bytes per entry). The systems I've seen pv entries run out on run to a
couple of orders of magnitude more than that.
There is a cron job restarting apache everyday at midnight so it cant
be apache leaking perhaps.
Load spikes maybe? Child count running into the stratosphere? Big PHP
opcode cache?
The machine is primarily serving perl pages through mod_perl2 and there are a
few PHP sites too but they are negligible. It is just that I never saw this kind
of message coming out on 6.3-stable i386 with the same sites which is kind of weird.
However a load spike might be the cause of course, I will try to catch this when
PV entry warning appear. Now that I know that procstat can show me more info, I
can try to collect some info to see if something looks weird. I will let you
guys know of my findings.
Thanks for the great help! This information was very useful.
Thanks,
Evren
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