[CentOS] same Old question: 32 bits VS 64 bits on database performance
Ken Price
kprice at nowyouknow.netMon Aug 27 15:28:19 UTC 2007
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> We have several large projects will use ORACLE 10Gr2 > database with CENTOS 4.X. Does anyone have > performance report on 32 Bits O.S. (with 32 bit > ORACLE) VS 64 bits? I don't have any "report" per se, however, I have production experience with Oracle 9i, 9iR2, 10g, and 10gR2 on RedHat 7.3, CentOS 3.X, and CentOS 4.X (32 and 64-bit). Typically speaking, there isn't a huge increase in performance moving from 32-bit to 64-bit (Dell PowerEdge 2950). I'd guess it's around 5-10% on the same hardware. However, the scalability of 64-bit - especially with regards to memory usage - should make this a no-brainer. ALWAYS go with 64-bit where possible for databases and application servers. If you are trying to same money and stick to older 32-bit hardware, there are of course workarounds for the memory limitations of the 32-bit OS using "hugepages". See the following: http://www.puschitz.com/TuningLinuxForOracle.shtml#LargeMemoryOptimization -Ken
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