How to check Filesystem Caching ?

[amreek bansal]

Hi,

DOes any one know how to check the filesystem caching limit in hp-ux please ?

Thanks

[Steven E. Protter]

Shalom,

HP-UX does not specifically cache by file system.

There is something called the buffer cache, which does speed i/o in file systems.

kmtune -l | grep dbc

or

kctune -l | grep dbc

This will show you the minimum and maximum limits on the buffer cache.

SEP

[Turgay Cavdar]

Do you mean file system buffer cache?

For hp-ux 11.31:
filecache_max
filecache_min

Others:
dbc_max_pct
dbc_min_pct

[Duncan Edmonstone]

depends what you mean by "filesystem caching limit"?

Do you mean how much memory can a system use for filesystem caching?

On 11.11/11.23 that would be the dbc_max_pct

On 11.31 That would be filecache_max

In both cases its expressed as a % of memory.

Use the kctune command to check these values

kctune dbc_max_pct

or

kctune filecache_max


HTH

Duncan

[amreek bansal]

Thanks guys, thats great.

[Duncan Edmonstone]

oh yeah, good point SEP - for 11.11 use kmtune rather than kctune

Syntax is the same.

HTH

Duncan

[Jitesh purohit_1]

Hi Amreek,

You can ref the link

http://www.docs.hp.com/en/5991-6469/ch06s10.html

what is the Version of HPUX ?

Thanks
Jitesh

[amreek bansal]

I'm using HP-UX 11.23

[Ganesan R]

Hi Amreek,

Read this..It has the details you are looking for.

http://docs.hp.com/en/7779/commonMisconfig.pdf