"Go" Linux View the number of file handles opened by the process

---View the default maximum number of file handles, the system defaults to 1024

# Ulimit-n

1024

----See how many handles the current process has opened

# Lsof-n|awk ' {print $} ' |sort|uniq-c|sort-nr|more

131 24204

57 24244

57 24231 .....

Where the first column is the number of open handles and the second column is the process ID.

You can view the process name based on the ID number.

# PS Aef|grep 24204

Nginx 24204 24162 99 16:15? 00:24:25/usr/local/nginx/sbin/nginx-s

Linux has hard limits and soft limits. These two parameters can be set by Ulimit. To do this, run the following command as the root user:

# ULIMIT-HSN 4096

In the above command, h specifies the hard size, s specifies the soft size, and n indicates the maximum number of open file handles that are set for a single process. Personally think it's best not to exceed 4096, after all, the more open file handle number of response time will certainly be slower. When the number of handles is set, the default value is restored after the system restarts. If you want to save it permanently, you can modify the. bash_profile file, and you can modify the/etc/profile to add the above command to the last.

Transferred from: http://blog.csdn.net/lastsweetop/article/details/6440136

"Go" Linux View the number of file handles opened by the process