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I have an issue with my tomcat service, for more background info click here.

What I am here about is that i suspect it has to do with my ulimit as my application does use rabbitmq and similar problems were spoken about in this stackoverflow thread

I then did more research and found this about ulimits.

The output of my command was "lsof | awk '{if(NR>1) print $3}' | sort | uniq -c | sort -nr" was:

330424 root
4260 rabbitmq
788 mem
103 txt
103 rtd
103 cwd

And my output from 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) 177092
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 177092
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

The open files for root and rabbitmq are way above the default value of 1024.

OS=Debian 7

RAM=20GB

Does this open file limit of 1024 affect the root if so taking into consideration the high number of open files for root and the RAM limitations i have, what is an optimal value or provide me with a method to arrive at this value.

The following link doesn't give much information how to get the ulimit value.

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