Re: 2 CPU VP's
Juan R. Guzman wrote:
>
> I have a Sparc 20 with 2 processors with Solaris 2.4 and Online 7.11UC1. I have
> been thinking of incrementing the amount of CPU VP's from one to two. I don't
> use the server for anything else other that for the Informix application. Any
> feedback from who has played with this before.
>
> thanks,
We have one server that have almost identical settings: Sparc 20 with 2
CPUs, Solaris 2.4, Online 7.11UC1, 96MB memory, 4 hard disks with
8GB. We also many other Sparc servers with many different hardware
environment.
We added the second CPU for Sparc 20 about one year ago and sAW the
performance improvement immediately. Following is our settings. If they
can be improved, please let me know.
CLEANERS 4
LRUS 24
LRU_MAX_DIRTY 30
LRU_MIN_DIRTY 15
CHPTINTVL 1800
MULTIPROCESSOR Y
AFF_SPROC 0
AFF_NPROCS 0
NUMCPUVPS 2
NUMAIOVPS 1
SINGLE_CPU_VP N
NOAGE 1
I believe that the above settings are appropriate only for two CPUs.
Once the number of CPUs exceeds TWO, you cannot just add NUMCPUVPS. For
example, you may want to evalute AFF_SPROC and AFF_NPROCS.
Chao Din
Chao Din