Yes I set tcp_max_connections=104096  

 

Laurent

 

 

De : Daniel-Constantin Mierla [mailto:miconda@gmail.com]
Envoyé : mardi 9 septembre 2014 15:09
À : Laurent Schweizer; Kamailio (SER) - Users Mailing List
Objet : Re: [SR-Users] TCP SYN only

 

Hello,

have you increased the max connections limit?

- http://www.kamailio.org/wiki/cookbooks/devel/core#tcp_max_connections

The PKG_MEM_POOL_SIZE is more or less same as -m parameter, so you don't need to change the sources if you need higher value.

Cheers,
Daniel

On 09/09/14 14:57, Laurent Schweizer wrote:

Hi,

 

Yes I check them, the only 2 point that I have actually not tested is to change :

 

- You might have to decrease TCP_BUF_SIZE to a smaller value (e.g 8K)

- You might want to increase PKG_MEM_POOL_SIZE (for large queues)

 

 

I’m using Kamailio 3.2.1

 

I have set:

tcp children to 50

tcp_max_connections=104096

 

started wit  -m 4096  -M 64

 

with sockstat I have:

 

sockets: used 2171

TCP: inuse 913 orphan 1 tw 4 alloc 939 mem 29

UDP: inuse 440 mem 372

UDPLITE: inuse 0

RAW: inuse 1

FRAG: inuse 0 memory 0

 

 

BR

 

Laurent

 

De : sr-users-bounces@lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org] De la part de Daniel-Constantin Mierla
Envoyé : mardi 9 septembre 2014 14:46
À : Kamailio (SER) - Users Mailing List
Objet : Re: [SR-Users] TCP SYN only

 

Hello,

have you checked the file in the sources located at doc/tcp_tunning.txt?

Cheers,
Daniel

On 09/09/14 14:40, Laurent Schweizer wrote:

Dear all,

Since few weeks I have more and more TCP issue, I can see that sometimes the client send a TCP SYN but never get any response. 

106.123315 62.12.179.104 -> X.X.X.X  TCP 39174 > sip [SYN] Seq=0 Win=4380 Len=0 MSS=1380 TSV=4294942209 TSER=0 WS=1

109.124384 62.12.179.104 -> X.X.X.X  TCP 39174 > sip [SYN] Seq=0 Win=4380 Len=0 MSS=1380 TSV=4294942510 TSER=0 WS=1

111.202946 62.12.179.104 -> X.X.X.X  TCP 4993 > sip [SYN] Seq=0 Win=4380 Len=0 MSS=1380 TSV=4294942717 TSER=0 WS=1

114.204707 62.12.179.104 -> X.X.X.X  TCP 4993 > sip [SYN] Seq=0 Win=4380 Len=0 MSS=1380 TSV=4294943018 TSER=0 WS=1

I have found on internet many doc regarding TCP and max connection issue and I have already done change in sysctl (see below) to increase the number of tcp connection but seems still not ok.

Any idea ?

Best regards

Laurent

net.ipv4.ip_forward = 0

net.ipv4.conf.default.rp_filter = 1

net.ipv4.conf.default.accept_source_route = 0

kernel.sysrq = 0

kernel.core_uses_pid = 1

net.ipv4.tcp_syncookies = 0

net.bridge.bridge-nf-call-ip6tables = 0

net.bridge.bridge-nf-call-iptables = 0

net.bridge.bridge-nf-call-arptables = 0

kernel.msgmnb = 65536

kernel.msgmax = 65536

kernel.shmmax = 68719476736

kernel.shmall = 4294967296

net.ipv4.tcp_timestamps = 1

net.ipv4.tcp_fin_timeout = 30

net.ipv4.tcp_keepalive_time = 1200

net.ipv4.tcp_max_syn_backlog = 8192

net.ipv4.tcp_max_tw_buckets = 5000

fs.file-max = 2097152

net.ipv4.ip_local_port_range = 2000 65535

net.ipv4.tcp_max_tw_buckets = 1440000

net.ipv4.tcp_tw_recycle = 1

net.ipv4.tcp_tw_reuse = 1

net.core.somaxconn = 65536

net.core.netdev_max_backlog = 65536

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-- 

Daniel-Constantin Mierla

http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda

Next Kamailio Advanced Trainings 2014 - http://www.asipto.com

Sep 22-25, Berlin, Germany

-- 

Daniel-Constantin Mierla

http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda

Next Kamailio Advanced Trainings 2014 - http://www.asipto.com

Sep 22-25, Berlin, Germany

-- 
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Next Kamailio Advanced Trainings 2014 - http://www.asipto.com
Sep 22-25, Berlin, Germany