Hi gurus,
Has anybody used diskratio parameter in rman, if so
have u seen any benefits using that
I am seeing a very high io used by rman here on a prod
box which is running on hp itanium.
since hp itanium does not support asynchronous i/o we
have enabled io_slaves to 4
we are taking backups of 300 gig database to 10
filesystems,(internally all of these are connected to
a volumne group of 30 disks and 4 controllers).
we were using 10 channels to take the backups to these
file systems.
the database files are distributed across 20 file
systems.
I did try bringing bring down the channels to 4 since
i thought we are using 4 controllers.the backup
completion time has not changed but i am seeing the
same io pattern.
was wondering to alter the diskratio and reduce the
filesperset
has anybody faced this performance problem before, if
yes can u please let me know how u were able to solve
this kind of an issue
thanks in advance
Arun
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Received on Mon Jul 11 2005 - 16:06:05 CDT
