Thai Duong wrote:
Hi Wendy,
Thx for the information. I'll turn on direct I/O on my system. Do you
have any information about how many percent I should gain in term of
I/O performance when turning direct I/O on in general and with Oracle
RAC in particular?
Our performance group did pass the numbers around sometime ago - the
gain seemed to be quite positive but I don't remember the details. On
the other hand, do remember this is not a frequent execution code path
so try to take the switching steps slowly (i.e. make sure you have
backup plan, etc, particularly on GFS 6.0 system).
-- Wendy
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