Testing System Memory for errors

[TSch]

Hi everybody,

is there an easy and reliable way to test the system memory (incl. vmm) for errors...
We are using Performance Diagnostic Tools on our machine and it tells us, that there have been 9 bad frames detected.... We'd like to confirm an localize it.

Thanks in advance !

Regards
Thomas

 

[aixqueen]

I remember seeing this somewhere....that it really wasnt a drop dead message......but a reporting problem based on the amount of memory...
There are a number of bugs in PDTwith respect to determining system memory configuration. The "16 bad frames" is one of them.

There was also a memory load control is disabled by default if you've got more than 128MB RAM,

Problem:
VMM-detected bad memory frames
Response:
It might be necessary to have the memory analyzed. Compare the amount of installed memory with the memory actually accessible. If the latter is less than the former, then bad memory has been identified.
You can use /usr/sbin/perf/diag_tool/getvmparms to examine the value of numframes to determine the actual number of valid 4 KB memory frames.
Useful cmds:
lscfg | grep mem (to obtain installed memory size in MB)
lsattr -El sys0 -a realmem
bootinfo -r
errpt -a

http://techsupport.services.ibm.com...mode=9&documents=090605226714706&database=aix

http://www.rs6000.ibm.com/doc_link/en_US/a_doc_lib/aixbman/prftungd/2365c22.htm

http://www.rs6000.ibm.com/doc_link/en_US/a_doc_lib/aixbman/prftungd/2365ch7.htm

Not sure this post will help........but maybe