RE: ASH Buffer max size
Date: Thu, 16 Apr 2009 22:49:30 +0200
yes, the information is pretty contradictory. I will test it myself and I will post the result to the list.
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Martin Berger
Sent: Donnerstag, 16. April 2009 21:25
Subject: Re: ASH Buffer max size
a short google search brought some ambiguous informations:
it's controlled by _ash_size
one formula is
Max( Min ( No. of CPU * 2 M, 5% of SHARED_POOL_SIZE, 2% of SGA_TARGET) ,1M) -
another: max (min (#of CPUs * 2MB, 5% of SHARED_POOL_SIZE, 30MB), 1MB) -
both seem to be about 10g.
Currently I have no informations if there are any changes in 11g, sorry.
happy testing with _ash* parameters.
> Hallo Listers,
> I have s simple question:
> What is the maximum size if ASH buffers.
> Some documents say it is 30Mb, other documents say it is 128MB (for
> Is there any change in the upper ASH buffers size 11GR1 ?
> Many thanks in advance.
> Best Regards. Milen