Hello, On Monday 16 of February 2009 17:49:52 Dale Worley wrote: > On Mon, 2009-02-16 at 09:17 +0100, Matus wrote: > > thanks for answer. :-) Strange is that is acting like that only for 5 - > > 10% of all calls from same provider and same number. And when i was > > comparing packet traffic only difference is on sipx end, it start with > > "SIP/sipfrag Request: NOTIFY sip:[email protected]:5060, with > > Sipfrag(SIP/2.0 503 Service Unavailable)." > > If a SIP message contains a sipfrag, then the message is reporting that > the network element received the contained message (in this case, "503") > from some other element. You want to determine where the 503 message > came from, as it indicates a serious error. >
503 is produced by sipx server. This is why i was looking at the memory ... Machine is not overloaded ... there is in or outgoing call ( except mine ), there is plenty of memory, no swap and load is under 1. What else can trigger this error ? > In your case, I suspect your ITSP is producing the 503, and that it is > doing so incorrectly -- 503 is supposed to be used only to indicate an > overload condition (see RFC 3261 section 21.5.4). > > > Today i found out that in this moment there is only 8MB of memory free on > > my sipx machine, can this be a problem ? There is plenty of not used > > swap. > No swap is used, right now machine is using around 25 - 50MB free ... I was just guessing if there is no build in mechanism preventing using swap ... but it isn't :) thanks Matus > Linux systems when they are operating normally have very little "free" > space, because they keep copies of various disk files in memory. If the > programs need space, the kernel will dispose of the file copies. What > is very important is that the rate of swap operations is very low, > preferably zero. "vmstat" and "xosview" will display the rate of swaps. > > Dale _______________________________________________ sipx-users mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-users Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-users
