Hi,

thanks to Simon Flannery, I now have a working test environment with SIPP and 
Asterisk. I wondered why only 83 concurrent calls were possible. The cpu was 
only at 24%, enough memory was free, network bandwith was only about 5MB up and 
down.

I checked Asterisk:

[Aug 23 17:49:44] WARNING[6889]: app_dial.c:1106 dial_exec_full: Unable to 
create channel of type 'SIP' (cause 42 - Switching equipment congestion)
[Aug 23 17:49:44] ERROR[6893]: rtp.c:1884 ast_rtp_new_with_bindaddr: Unable to 
allocate socket: Too many open files
[Aug 23 17:49:44] ERROR[6893]: rtp.c:1884 ast_rtp_new_with_bindaddr: Unable to 
allocate socket: Too many open files
[Aug 23 17:49:44] WARNING[6893]: chan_sip.c:4380 sip_alloc: Unable to create 
RTP audio and video session: Too many open files
[Aug 23 17:49:44] ERROR[6893]: chan_sip.c:15643 sip_request_call: Unable to 
build sip pvt data for '192.168.2.3' (Out of memory or socket error)


You would probably say, hey this is an already known error. Can“t you read faqs?
"Too many open files".
- So, according to the faqs, ulimit should be used.

But ulimit shows unlimited, I set it to 65000, well nothing changed, still 83 
concurrent calls.

- What can be done next:

/etc/security/limits.conf

root            soft    nofile          4096
root            hard    nofile          8196
asterisk        soft    nofile          4096
asterisk        hard    nofile          8196

=> nothing changed.

- raising some parameters according to a performance article:

sysctl -w net.ipv4.neigh.default.gc_thresh3=262144
echo 262144 > /proc/sys/fs/file-max
echo 131072 > /proc/sys/kernel/threads-max
echo 111616 > /proc/sys/net/core/wmem_default
echo 4194304 > /proc/sys/net/core/wmem_max
echo 111616 > /proc/sys/net/core/rmem_default
echo 4194304 > /proc/sys/net/core/rmem_max
echo 4096 > /proc/sys/net/core/netdev_max_backlog
echo 131072 > /proc/sys/net/ipv4/tcp_max_tw_buckets
echo 16384 65535 > /proc/sys/net/ipv4/ip_local_port_range
echo 0 >> /proc/sys/net/ipv4/ip_forward

=> nothing changed.



Yes, I rebooted each time.


So, can anyone please help me with this issue? Has anyone had the same problems?

thanks in advance

Christian










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