Tunning for performance (was: tar's default block size & shoe-shinning)

[Cyrille Bollu]

Hi all,

I haven't yet solved my performance problem but I wanted to share the following URL with anybody who is experiencing the same problem as me:

        http://www.redhat.com/magazine/001nov04/features/vm/

It introduces a lot of Linux's virtual memory configuration parameters (/proc/sys/vm/...).

In fact, I just noticed that kswapd and kscand are eating a lot of CPU% when amanda is running... Maybe that's related...

I've already set the "noatime" flag to my filesystem, and changed my logical RAID drive's settings to "READAHEAD" and "CachedIO". But none helped.

Regards,

Cyrille