Hi, We are running some stress tests again freeswitch using sipp. At 100 concurrent call, Freeswitch starts to throw out some strange error messages: freeswitch@lab> 2008-07-21 06:27:51 [CRIT] switch_core_session.c:826 switch_core_session$ 2008-07-21 06:27:51 [CRIT] sofia.c:3177 sofia_handle_sip_i_invite() LUKE: I'm hit, but not $ 2008-07-21 06:27:51 [CRIT] sofia.c:3178 sofia_handle_sip_i_invite() LUKE'S VOICE: Artoo, se$ Green laserfire moves past the beeping little robot as his head turns. After a few beeps a$ Artoo reduces the max sessions to 328 thus, saving the switch from certain doom. ----------------------------- Statistics Screen ------- [1-9]: Change Screen -- Start Time | 2008-07-21 06:41:00:154 1216593660.154593 Last Reset Time | 2008-07-21 06:49:25:136 1216594165.136188 Current Time | 2008-07-21 06:49:26:139 1216594166.139989 -------------------------+---------------------------+-------------------------- Counter Name | Periodic value | Cumulative value -------------------------+---------------------------+-------------------------- Elapsed Time | 00:00:01:003 | 00:08:25:985 Call Rate | 9.970 cps | 9.998 cps -------------------------+---------------------------+-------------------------- Incoming call created | 0 | 0 OutGoing call created | 10 | 5059 Total Call created | | 5059 Current Call | 100 | -------------------------+---------------------------+-------------------------- Successful call | 10 | 4387 Failed call | 0 | 572 -------------------------+---------------------------+-------------------------- Response Time 1 | 00:00:00:018 | 00:00:08:545 Call Length | 00:00:10:021 | 00:00:22:125 ------ [+|-|*|/]: Adjust rate ---- [q]: Soft exit ---- [p]: Pause traffic ----- Last Error: Aborting call on unexpected message for Call-Id '3143-6125@1... When increasing the number of concurrent calls to several hundreds, Freeswitch throws the following error: [CRIT] switch_time.c:394 softtimer_runtime() Over Session Rate of 30! The test is run on Dual Core Intel P4 3GHz with 1G of RAM. Is this kind of performance normal for such kind of machine or there are some OS configs required to enable more concurrent calls? What kind of number should I be expecting to get? JB