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Home -> Community -> Usenet -> c.d.o.misc -> Re: Performance issues when running in archive redo log mode
Birsan wrote:
>
> One of the consultants that we are working with claims that their tests have
> consistently shown that there is a significant performance hit when ORACLE 7
> (running on UNIX, different flavors, one of them being NCR UNIX), is set to
> operate in archive redo log, as oposed to non archive redo log, mode (the
> performance hit is said to be 30-40%). This confuses me, because I had the
> obvious misconception that the only difference (as long as you do not
> actually issue "alter tablespace begin backup") is that you do not re-use
> the redo logs, but "archive" them, so that they can be used later in the
> recovery process. I certainly did not expect such a big hit, which basically
> stops us from using normal on-line backup procedures, even though
> availability has to be 7x24. For performance reasons as well, the consultant
> recommends not using replication either, which leaves us with the only
> choice of a proprietary application replication scheme, in order to provide
> high availability and database maintenance capabilities (provided by the
> consultant). Can anyone confirm that these claims make sense?
> Thank you for your response!
You only have one configuration error here - your consultant ! --
"Some days you're the pigeon, and some days you're the statue." Received on Wed Nov 03 1999 - 04:39:42 CST
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