I'll take a shot at this.
Don't have any write caching. Oracle may think that it has safely
committed the transactions and they are written to disk when they are in
fact only in cache. If the machine were to shut down ungracefully, i.e.,
someone kicks out the plug, then your database would not be in a consistent
state. Granted, the odds are small, but is it worth the risk? If the
database is archived and you don't mind the increased chance of having to
do a recovery then I would say 0% read - 100% write. Oracle is doing it's
own read caching in the SGA and it's unlikely that the disk cache will
correctly anticipate Oracle's read requirements. Therefore, caching on the
read side is only likely to increase IO. Write caching does not lead to
any increased IO but it does have some small risk of producing an
inconsistent database.
GKor
@rdw.nl To: Multiple recipients of list ORACLE-L
<[EMAIL PROTECTED]>
Sent by: root cc:
Subject: cache settings NT
09/06/2002
04:18 AM
Please
respond to
ORACLE-L
Hi all
I have the following question for you :
what are the preferred values for the several cache settings on the fysical
disk units (NT W2K)
e.g. 100 % read cache - 0 % write cache
50% read cache - 50% write cache
is there a difference between settings for an OLTP or DSS solution.
etc
anyone with an explanation
vr. gr.
g.g. kor
rdw ict groningen
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