Re: Exadata X2-8 questions
- From: K Gopalakrishnan <kaygopal@xxxxxxxxx>
- To: grzegorzof@xxxxxxxxxx
- Date: Fri, 21 Sep 2012 23:29:51 -0500
GG,
You can specify the objects kept in the flash cache. However they are not
part of IORM.
You are right on Storage Indexes. They are maintained at cell level and
they are not persistent across restarts.
They are just memory structures (bitmaps) kept in the cell servers. It
keeps the low -high values of the columns on that region and helps to
reduce the IO when those segments are scanned. The design is such that, it
might give occasional false positive, but never a false negative.
-Gopal
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