Hi Daniel,

Thanks for the reply again. Looking at the email history, I'm not sure how we decided it was definitely a pkg memory problem. What we see is the output of "ps aux" as follows:

root@sip0-test:~# ps aux | egrep -i "kamailio|mem"
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root      6794 0.0 0.0 22480 1868 ?        Ss   Oct02   0:12 /opt/testuser/current/sbin/testuser_safe_kamailio
testuser 6822 0.0 0.2 556528 4580 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6824 0.3 8.7 825552 180244 ?       S    Oct02 56:40 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6825 0.3 8.7 825536 180776 ?       S    Oct02 56:20 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6826 0.3 8.7 825912 180296 ?       S    Oct02 55:54 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6827 0.3 8.7 825744 180580 ?       S    Oct02 56:19 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6828 0.3 8.7 825536 180092 ?       S    Oct02 56:25 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6829 0.3 8.7 825536 180632 ?       S    Oct02 56:21 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6830 0.3 8.7 825472 180968 ?       S    Oct02 56:37 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6831 0.3 8.7 825276 180272 ?       S    Oct02 56:41 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6832 0.0 0.0 556528 1324 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6833 0.0 0.0 556528 1324 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6834 0.0 0.0 556528 1324 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6835 0.0 0.0 556528 1324 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6836 0.0 0.0 556528 1324 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6837 0.0 0.0 556528 1324 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6838 0.0 0.0 556528 1324 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6839 0.0 0.0 556528 1324 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6840 0.0 0.0 556528 1776 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6841 0.0 0.0 556528 1780 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6842 0.0 0.0 556528 1780 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6843 0.0 0.0 556528 1328 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6844 0.0 0.0 556528 1780 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6845 0.0 0.0 556528 1328 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6846 0.0 0.0 556528 1328 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6847 0.0 0.0 556528 1328 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6848 0.0 0.0 556528 1676 ?        S    Oct02   0:02 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6849 0.0 0.1 556528 3568 ?        S    Oct02   5:28 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6850 0.0 0.0 556612 1600 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6851 0.0 0.0 556532 1188 ?        S    Oct02   0:00 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid
testuser 6852 0.0 0.0 556528 1360 ?        S    Oct02   0:02 /sbin/kamailio -m 512 -P /var/run/testuser/kamailio.pid

You'll see for example that process 6824 is using 8.7% of memory, which is much more than it was using 5 days ago. Yet if I run the same sercmd again I get (exactly!) the same numbers:

root@sip0-test:~# sercmd pkg.stats pid 6824
{
    entry: 1
    pid: 6824
    rank: 1
    used: 209836
    free: 3704080
    real_used: 490224
}

Any ideas?

On 12 October 2013 00:23, Daniel-Constantin Mierla <miconda@gmail.com> wrote:

Hi David,

On 10/10/13 11:36 PM, David Cunningham wrote:

Hi Daniel,

Thanks for the reply. Perhaps what we're seeing is normal, and the memory use is meant to increase as time progresses. Would you expect to see an ongoing memory use increase, or when should it stop increasing?

private memory (pkg) should stay rather constant. It increases when there is a sip message processed, but once is sent out, it should come back around the average.

There are couple of functions that can fill the private memory and keep it up, such as doing an sql_query() that returns a big data and the result is not freed (sql_result_free()). It is not actually a leak as the next sql_query() will free previous result, but in case you have such query for some corner case that is not executed frequently, then the memory can stay filled in. Another example will be storing very large value in a $var(...) (e.g., $var(x) ).

This is private memory, per process, which is meant for temporary operations. Shared memory (shm) can increase over the time, being the place where the dynamic data required at runtime is stored (e.g., location records, hash tables, transactions) - so as you get more traffic or more phones using kamailio, more shm is used. But your problem was reported for pkg.

Anyhow, keep an eye on the pkg.stats and if you see constant increase which is substantial, then get a mem log dump.

Cheers,
Daniel

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