RE: Problems with large pages on AIX after upgrading to 10.2.0.4.3
From: Allen, Brandon <Brandon.Allen_at_OneNeck.com>
Date: Thu, 4 Mar 2010 11:55:43 -0700
Message-ID: <64BAF54438380142A0BF94A23224A31E114486FF4D_at_ONEWS06.oneneck.corp>
No, we didn’t see any AIX errors, but it was weird what would happen when we started up the instance before we tried setting ORACLE_SGA_PGSZ. We’d set lgpg_regions=64 and reboot the host, then when it came up, it would show the 64 pages allocated in the output of svmon –G and vmstat –l, like this:
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Date: Thu, 4 Mar 2010 11:55:43 -0700
Message-ID: <64BAF54438380142A0BF94A23224A31E114486FF4D_at_ONEWS06.oneneck.corp>
No, we didn’t see any AIX errors, but it was weird what would happen when we started up the instance before we tried setting ORACLE_SGA_PGSZ. We’d set lgpg_regions=64 and reboot the host, then when it came up, it would show the 64 pages allocated in the output of svmon –G and vmstat –l, like this:
large-page
alp flp
0 64
But after we’d start the Oracle instance, the value of flp would go down by some odd number, but alp wouldn’t go up like it should:
large-page
alp flp
0 35
After setting ORACLE_SGA_PGSZ=16m and increasing lgpg_regions=65, we now see all the pages allocated to Oracle as expected:
large-page
alp flp 65 0
Regards,
Brandon
From: patrick obrien [mailto:po04541_at_yahoo.com]
Allen,
did you get any kind of aix error? errpt -a, if so, ibm might have a fix for this.
POB.
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