Re: fs.file-max

[Dan Kegel <dank@kegel.com>]

Federico Edelman Anaya (fedelman@elsitio.com.ar) wrote:

> What can I do to test the FD limit? ... Because, the FD limit is set in 
> /proc/sys/fs/file-max, sample: 
> 
> echo "2048" > /proc/sys/fs/file-max 

That sets the systemwide limit to 2048.  

> ulimit -n 8192 

That sets the per-process limit (for this process
and its children) to 2048.  
 
> In this case ... the FD limit = 8192 :( ... when the limit should be 
> 2048? 

No, the two limits are independant (except, obviously, that
that process will reach the systemwide fd limit before it
exhausts its per-process fd limit).
 
> I wrote a perl script for the test ... anybody known a "C" program for 
> test the FD limit? 

http://www.kegel.com/dkftpbench/#tuning

- Dan