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I'm having two DB servers and two Application servers running on IBM AIX 5.3 OS

I'm using Oracle DB 10.2.0.4 with RAC environment and EBS Application is R12.1.3.

In my DB server I could find I have 32 GB each in both my DB servers and 32 GB each in Application servers.

How can I check if the memory in both the nodes of DB and Application server are shared memory or it has been added to only one server.

That is, if I have 32 GB in node 1 of DB server and 32 GB in node 2 of DB server how can I check if the 32GB memory is not shared between the two servers ?

I'm using TOPAS command to check the memory.

Please provide me a command to check this.

ARGStackOvaFlo
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1 Answers1

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lparstat -i in the partition includes Memory Mode, whether Dedicated, Shared, or if Active Memory Expansion is enabled, Expanded. Although, man page and Red book suggest active memory sharing is available with AIX 6.1 and later.

While you are at, check which frames each partition is running on. If you have more than one physical host, might as well spread the application across them, in case one fails.

You should upgrade the OS, 5.3 is end of service.

I recommend Dedicated memory for nearly all workloads. Oversubscribing has some performance risk if the memory demands exceeds installed RAM.

John Mahowald
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