Buffer cache issue

[Yann Lambret]

Hi all,

I would like to change the buffer cache size on a server using HP-UX 11.11.

At this time, I have a dbc_max_pct set to 50% of physical memory, and I would like the value to be 10%.

I don't know if this parameter can be modified dynamically. I've read a few documentations, and it seems I have to rebuilt a kernel. Can anyone please confirm that ?

All the documentation I've found explained why I should change this parameter but not how to do it :-)

Thank you for your help (and sorry for my approximative english).

Yann

[Kent Ostby]

Yann -- You do have to rebuild the kernel for that parameter and do a reboot.

[Jeff_Traigle · Accepted solution]

If you run "kmtune -q dbc_max_pct" you can see whether it's dynamic or not. From memory, I don't think that one is so a kernel rebuild and reboot would be required.

[Yann Lambret]

Thanks for your answers,

dbc_max_pct isn't indeed a dynamic parameter. I'm going to rebuilt a kernel then...

[Yann Lambret]

Sorry, forgot to close.