[CentOS] Are file system mounts costly?

Tue Aug 16 21:29:06 UTC 2011
Marian Marinov <mm at yuhu.biz>

On Wednesday 03 August 2011 23:29:48 Reynolds McClatchey wrote:
> I recall a kernel parameter on Unix System V of number
>  of mounted file systems. Max recommended was 8.
>  Larger numbers slowed down inode location and
>  impacted performance.
> 
> Has Linux solved that bottleneck? Are 20 or 30 mounted
>  efs and cifs file systems on one system OK?

I'm running servers with almost 1500 bind mounts... 
Before that I did check when the server performance is impacted.

So what I found was that when you reach around 20000 mounts all commands start 
to take a long time to execute.

 
Best regards,
Marian Marinov
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