RE: Hugepages - benefits / drawbacks
Date: Sun, 5 Oct 2008 14:13:57 -0400
Message-ID: <667C10D184B2674A82068E06A78382B527A370A2@AAPQMAILBX01V.proque.st>
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_at_freelists.org [oracle-l-bounce_at_freelists.org] On Behalf Of Vladimir Barac [vbarac_at_Alghanim.com] Sent: Sunday, October 05, 2008 11:08 AM
To: oracle-l_at_freelists.org
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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