Max Number of Sockets on Linux – Understanding Limits

linuxnetworkingsocket

It seems that the server is limited at ~32720 sockets… I have tried every known variable change to raise up this limit. But the server stay limited at 32720 opened socket, even if there is still 4Go of free memory and 80% of idle cpu…

Here's the configuration

~# ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 63931
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 798621
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 2048
cpu time               (seconds, -t) unlimited
max user processes              (-u) 63931
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

net.netfilter.nf_conntrack_max = 999999
net.ipv4.netfilter.ip_conntrack_max = 999999
net.nf_conntrack_max = 999999

Any thoughts ?
(This question as been asked on stack-overflow with no luck so far)

Best Answer

I have found whats was limiting everything : 

max_map_count

Thanks to everyone who answered !

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