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тАО10-17-2005 12:33 AM
тАО10-17-2005 12:33 AM
we have 16 gb of memory on both boxes, and we did NOT change any SGA's just ftp'd copies of the databases over to the itanium box. However, memory on the Itanium is at 99% and it was less then 60% on the V2500 server.
Can someone tell me if there is a difference on how the Itanium boxes or 11.23v2 allocates memory? I used Oracles documentation for kernel parameters but is there another one i should be looking at?
Solved! Go to Solution.
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тАО10-17-2005 12:46 AM
тАО10-17-2005 12:46 AM
Re: Itanium vs PA-Risc for Oracle Databases
Buffer Cache is at 8gb on this system. dbc_max_pct is at the default of 50 for it's value
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тАО10-17-2005 12:54 AM
тАО10-17-2005 12:54 AM
Re: Itanium vs PA-Risc for Oracle Databases
What is the RDBMS version? I'm asking because only Oracle 9.2 64-bit is certified on Itanium 11.23 and you should patch it to 9.2.0.6...
Best Regards,
Eric
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тАО10-17-2005 12:58 AM
тАО10-17-2005 12:58 AM
Re: Itanium vs PA-Risc for Oracle Databases
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тАО10-17-2005 01:03 AM
тАО10-17-2005 01:03 AM
SolutionFurthermore, check recomendations for other significant kernel parameters when running Oracle in anexed doc...
Best Regards,
Eric
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тАО10-17-2005 01:08 AM
тАО10-17-2005 01:08 AM
Re: Itanium vs PA-Risc for Oracle Databases
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тАО10-17-2005 01:24 AM
тАО10-17-2005 01:24 AM
Re: Itanium vs PA-Risc for Oracle Databases
For more kernel parameters (since I'm not able to attach docs. witch more than 1Mb), see this thread:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=915316
Best Regards,
Eric
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тАО10-17-2005 02:12 AM
тАО10-17-2005 02:12 AM
Re: Itanium vs PA-Risc for Oracle Databases
I believe you just hit bug 3890965 "ORACLE CONSUMES LARGER MEMORY IN HP-UX ITANIUM PORT"
Regards
Jean-Luc
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тАО10-17-2005 03:47 AM
тАО10-17-2005 03:47 AM
Re: Itanium vs PA-Risc for Oracle Databases
You can tune your memory as per other post., but I don't think the "bug" is corrected in 9.2.0.6. Check Metalink (or ask your DBA to do it for you).
From this :
[output of glance] - Itanium - Text RSS/VSS:112mb/112mb Data RSS/VSS:5.0mb/6.0mb Stack RSS/VSS:384kb/256mb Shmem RSS/VSS:229mb/242mb Other RSS/VSS:7.8mb/ 24mb - PA-RISC - Text RSS/VSS: 64mb/ 64mb Data RSS/VSS:2.0mb/2.0mb Stack RSS/VSS:128kb/192kb Shmem RSS/VSS:226mb/242mb Other RSS/VSS:4.4mb/9.0mb .
"Text Segment is about double the size but most of them are shared among each server processes so it is not a problem. . The problem is that Data Segment differs about 4MB. Data Segments are not shared among the server processes so this memory adds up when there are many connections. "
Regards
Jean-Luc
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тАО10-17-2005 03:56 AM
тАО10-17-2005 03:56 AM
Re: Itanium vs PA-Risc for Oracle Databases
http://download-uk.oracle.com/docs/pdf/B10566_05.pdf
Section 6.1, page 21
Also see the discussion here. When I size customers moving from PA-RISC to IA64, I generally add 50% more memory for Oracle systems:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=814468
HTH
Duncan
I am an HPE Employee