dpc_min_pct dpc_max_pct

[GrahamBright]

I recently thook ownership of a L Class with 4 Gbytes of ram, which was performing rather poorly.

dpc_min_pct and dpc_max_pct which specify the percent of memory to be used for dynamic buffer cache where both incorrectly set to 3.

After changing these values a rebuld of the kernel idle I was able to improve the idle time by around 15 - 20 percent.

Q. Are there any other parameters, or advice regarding tuning which you can share. I'd like to improve performance by another couple of percentage if possible.

Cheers,

Graham.

 

[Martin999]

Try these settings ...

kmtune |grep dbc_max_pct
dbc_max_pct 25 - 25

kmtune |grep dbc_min_pct
dbc_min_pct 5 - 5

I believe these are the HP reccommended values.

Martin

 

[MadMichael]

Check out SARCHECK (

http://www.sarcheck.com),

I use it on a daily basis.

 

[GrahamBright]

Thanks I'll check it out.

dpc_max_pct should be greather than dpc_min_pct. A mistake was made during installation time, resulting in a very unstable system.
Graham.