I tried several ways to change the open file limit using url

http://www.cyberciti.biz/faq/linux-increase-the-maximum-number-of-open-files/

which i changed limit.conf and /etc/sysctl.conf

it works with a different user, but the open root file limit does not change

/etc/security/limits.conf

#####
*       -        nproc           8500
*       hard     nofile          200000
*       soft     nofile          200000
*       hard     stack           8192
*       hard    sigpending       45056

root    hard     nofile          200000
root    soft     nofile          200000
root    hard     no file         200000

      

        
        
        
      

    

/etc/sysctl.conf

# Controls the maximum number of shared memory segments, in pages
kernel.shmall = 4294967296
fs.file-max = 200000

      

        
        
        
      

    

Reboot the server, after that

[root@ironman ~]# ulimit -n
8192

      

        
        
        
      

    

Finally I add below command to / etc / bashrc and it works for root user too I don't really understand why setting only sysctl.conf / limits.conf doesn't affect?

Please inform