topic Re: how to reduce nbuff in Operating System - HP-UX

how to reduce nbuff

rahul90 — Thu, 10 Aug 2006 02:32:16 GMT

I am using N class server.My nbuff goes to high.can u give the soloution to reduce my nbuff

Re: how to reduce nbuff

Adisuria Wangsadinata_1 — Thu, 10 Aug 2006 02:46:16 GMT

Hi Rajeshraj,

You talking about 'nbuff' or 'nbuf' (different is with double or single 'f').

For nbuf, you can use SAM to adjust this kernel parameter :

SAM > Kernel Configuration > Kernel Parameters > Select 'nbuf' with spacebar > Goto Actions > Modify Configurable Parameter

The details of the kernel at this url below :

http://docs.hp.com/en/TKP-90202/re51.html

And since this is a static kernel parameter, you need to reboot the system so the system can take effect of the new kernel value.

Hope this one can help.

Cheers,
AW

Re: how to reduce nbuff

Michael Steele_2 — Thu, 10 Aug 2006 02:52:04 GMT

Use the default values of zero for nbuf and buffpages to enable dynamic growth.

http://docs.hp.com/en/939/KCParms/KCparam.Nbuf.html

What command are you using to determine that nbuf is too high? I.e., sar -b 5 5

http://docs.hp.com/en/B2355-60103/sar.1M.html

Re: how to reduce nbuff

rahul90 — Thu, 10 Aug 2006 19:27:37 GMT

thanks for ur reply.I am asking for to reduce 'nbuff' not for 'nbuf'.