Rman io done waits and the rate parameter
- From: Fuad Arshad <fuadar@xxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Mon, 20 Dec 2004 06:37:14 -0800 (PST)
we are having very high iodone waits.
and i was wonderign if somone on a list has had to go thru the same issues
thisis a snap from the statspack reports.
Avg
Total Wait wait Waits
Event Waits Timeouts Time (s) (ms) /txn
---------------------------- ------------ ---------- ---------- ------ --------
io done 7,318,903 5,192,927 122,807 17 146.5
sbtwrite2 4,240,771 0 126,120 30 84.9
io done 7,318,903 5,192,927 122,807 17 146.5
currently we are on gen1 tape drive plannign to move to gen2's
the backup of a 1 tbte database takes around 4 hours but the application
timings go up by 20%
i am also looking at ways people have had to use the rate or the readrate
parameter to throttle down the amount of i/o and tune down rman.
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