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Memory used just 16% from 64 GB

 
dharmasetiadi
Occasional Contributor

Memory used just 16% from 64 GB

Dear All

Please help, we have RX6600 Server with 64 GB Memory and that server used for oracle database.
I beliave the server used more than 20 GB Memory usage for Oracle. The question is, why Memory Usage in swapinfo just used 16%?

#swapinfo
Kb Kb Kb PCT START/ Kb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 16777216 0 16777216 0% 0 - 1 /dev/vg00/lvol2
dev 50331648 0 50331648 0% 0 - 2 /dev/vg00/lvol9
reserve - 26058748 -26058748
memory 67075016 10902896 56172120 16%


Regards,
Dharma

2 REPLIES 2
mbarnwal
Frequent Visitor

Re: Memory used just 16% from 64 GB

Hi Dharma,

memory line in swapinfo output does not show physical memory usage but shows pseudo swap usage, which is not actually memory usage but just indicates the swap reservation by pseudo swap.

You may learn more about swap usage and pseudo swap, you may refer article emr_na-c01083061 "HP-UX 11.x Operating Environments - The Facts about Swap Space, Including a Definition of Pseudo Swap".

To measure memory usage on HP-UX, you may use glance.

I am an HPE Employee.

Regards.
Manish


I work for HPE. The comments in this post are my own and do not represent an official reply from the company. No warranty or guarantees of any kind are expressed in my reply.

I am a HPE Employee
Bill Hassell
Honored Contributor

Re: Memory used just 16% from 64 GB

Oracle uses shared memory which will be the large chunk you are looking for. Use ipcs to find all the shared memory segments:

# ipcs -bmop

For easier to read values for memory usage and program details, run the (optional product) glance.



Bill Hassell, sysadmin