RE: Hugepages - benefits / drawbacks
- From: "Bobak, Mark" <Mark.Bobak@xxxxxxxxxxxx>
- To: "vbarac@xxxxxxxxxxxx" <vbarac@xxxxxxxxxxxx>, "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Sun, 5 Oct 2008 14:13:57 -0400
Hugepages are a good thing. They prevent swapping, and less CPU overhead due
to no page table lookups, and since they don't swap, kswapd won't attempt to
manage them.
I'm not aware of any drawbacks to configuring hugepages.
You mention you're running 64 bits. It seemsthat document is 32-bit specific?
You might want to check out Doc ID 361468.1.
Bottom line, hugepages are good. You should be using them.
-Mark
________________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx [oracle-l-bounce@xxxxxxxxxxxxx] On Behalf
Of Vladimir Barac [vbarac@xxxxxxxxxxxx]
Sent: Sunday, October 05, 2008 11:08 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Hugepages - benefits / drawbacks
Hello to everyone
SuSE SLES 10 64bit, Oracle 10.2.0.4 standalone (no RAC)
We are planning to utilize hugepages on systems that come with 32GB to 64GB of
memory. We are following steps from Metalink note 560501.1.
Are there some real performance gains when using hugepages? Are there some new
problems introduced with this option?
Looking forward for answers,
Vladimir Barac
Database administrator | Alghanim Industries
P.O. Box 223, Safat 13003, Kuwait
Tel: +965 881 111 / ext. 2960
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