Hi,
I fixed some memory leaks in master on 4th July.
The main leak I was investigating was the tcp connection structures used
by the websocket module. When the connection is used, the ref count is
increased, and should be decreased when each packet/transaction etc has
completed. Each connection includes a tcp buffer, so leaking these can
use up the memory very fast.
I put some extra info into the kamcmd core.tcp_list command to display
the refcount. If during use, the refcount is always increasing, then
this structure will not be freed when the connection closes, but it will
disappear from the list.
I went through and checked that all tcpconn_get and tcpconn_put calls
were done, this improved the situation a lot, but I don't think I fully
fixed it - we were still getting some increasing refcounts. I sent a
message to the dev list
(
http://lists.sip-router.org/pipermail/sr-dev/2013-July/020624.html) to
check if my use of tcpconn_put/get was correct, but no-one agreed or
disagreed. Maybe it just needs some extra pairs of eyes on the code.
Hugh
On 26/09/2013 10:18, Daniel-Constantin Mierla wrote:
Hello,
the output of top is not relevant, because kamailio uses an internal
memory manager. If system memory is increasing, then it is likely to
be from an external library.
I saw there was work on websocket, not being the developer I don't
know if it something to be backported. Maybe Peter or Hugh can jump
here with clarifications.
Cheers,
Daniel
On 9/25/13 12:40 PM, Vitaliy Aleksandrov wrote:
I switched to the latest master branch and it
seems it works better,
but unfortunately I can't understand how much PKG memory kamailio
really uses to know it still has problems with PKG.
For instance "kamcmd pkg.stats" always shows that tcp_main process
has free: 32627984 (started with -M 32), while real_used: 22560048
and RES in top output for the same process is 8904.
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Hugh Waite
Principal Design Engineer
Crocodile RCS Ltd.