add memory, need to modify kernel params?

[John Kittel]

HP-UX 11i. rp7410 ( two of them actually).

I am adding memory to increase from 10GB to 16GB.

I plan to adjust kernel params dbc_max_pct and dbc_min_pct to maintain my current 800MB size buffer cache. I know how to do that.

Are there other kernel params that may need to be adjusted? One system runs oracle, if that matters.

- JOhn

[Christopher Caldwell · Accepted solution]

In general, you shouldn't need to modify any other kernel parameters.

[James R. Ferguson]

Hi John:

In lieu of using a dynamic buffer cache you could use a static one to avoid this in the future.

If your performance is good, and you have not encountered any fence limits (e.g. in the data stack size ('maxdsiz*', etc), then there is nothing the must be adjusted simply because you have added more physical memory.

Regards!

...JRF...

[John Kittel]

Thanks.