Re: excessive number of db writer
- From: "Anjo Kolk" <anjo.kolk@xxxxxxxxxxx>
- To: ax.mount@xxxxxxxxx
- Date: Wed, 6 Sep 2006 11:41:33 +0200
Did the consultant also tell you to dim the light in the computer?
Without knowing more detail about your system, these settings look rather
suspicious. It looks more like a consultant showing of his _ parameter
knowledge (or actually lack of it).
If I had to interpret these recommendations, I would say that you have a
system that suffers from many hard/soft parsers (library cache and shared
pool latch contention) and some DBWR performance problems. But again without
more data (versions, stats etc) I wouldn't be able to tell for sure.
Anjo.
On 9/6/06, amonte <ax.mount@xxxxxxxxx> wrote:
Hi
I have been suggested by some Oracle Consultant to set 20 Database Writer
in a 12 CPU HP-UX Server.
Does anyone know what are the side effects of having excessive DBWR? I
detected a higher CPU usage (between, 1% to 2%) not sure if its due to the
number of Database Writer. Because when I increased the number of DBWR at
init.ora I also changed these parameters
_row_cache_cursors = 60
_kgl_latch_count = 59
_kghdsidx_count = 4
statistics_level = basic
again suugested by this guy.
TIA
Alex
--
Anjo Kolk
Owner and Founder OraPerf Projects
tel: +31-577-712000
mob: +31-6-55340888
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