Memory upgrade on rp8420

[Muthyala]

Hi

Currently I have 48GB (AB308A) installed on my rp8420 server running HP-UX 11iV1 with Oracle 10G database.

We are planning to upgrade with 96GB (AB309A) memory by replacing the 48GB modules, my question is

1. Is there any pre-requisites to be done on HP-UX /oracle side?
2. Kernel parameters /Hardware changes etc.

Please advice

TIA
Sri

[Jeeshan · Accepted solution]

>>1. Is there any pre-requisites to be done on HP-UX /oracle side?

Oracle side not necessary. From HP-UX side you have to make sure you have got the exact memory what you replaced.

>>2. Kernel parameters /Hardware changes etc.

check the kernel parameters dbc_max_pct and dbc_min_pct. for larger amount of memory the max parameter may be 10 and min parameter may be 2.otherwise larger block of memory will be unutilized.

[James R. Ferguson]

Hi Sri:

You probably want to add more secondary device swap.

You may want to adjust your 'dbc_max_pct' and 'dbc_min_pct' downward if your UNIX buffer cache is already sufficient.

You may want to increase the memory given to Oracle for its internal buffers and/or kernel parameters like 'shmmax' that govern shared memory.

A definitive answer depends on more specific knowledge of your environment and its performance characteristics.

Regards!

...JRF...