topic Re: memory error in my root log file in Operating System - HP-UX

memory error in my root log file

ng_7 — Thu, 31 Jul 2008 02:24:34 GMT

Dear Expert,

I have the below error in my log file.
Please tell me what is the problem and the recommendation.

detail error as per attached

thanks

Event Time..........: Fri Jul 18 19:54:03 2008
Severity............: CRITICAL
Monitor.............: dm_memory
Event #.............: 1300
System..............: tamcodb1.tamco.com.my

Summary:
Memory Event Type : A memory page has been deallocated and entered into
the Page Deallocation Table (PDT).

Description of Error:

The Page Deallocation Table (PDT) is 94% full.

PDT Entries Used: 241
PDT Entries Free: 15
PDT Total Size: 256

An excessive number of memory pages have been deallocated due to
excessive correctable single bit errors being detected. Although the
errors are being corrected, this condition indicates a potential
problem.

Probable Cause / Recommended Action:

The Page Deallocation Table (PDT) is in danger of overflowing, it is
strongly advisable to closely monitor the situation. Although the errors
are being corrected, this condition indicates a potential problem. Contact
your HP support representative to check the memory boards.

Re: memory error in my root log file

Deepak Kr — Thu, 31 Jul 2008 02:41:45 GMT

Hi,

Looks like Memory DIMMS are having an issue.
Log a case with HP support/Response Center for a confirm check.

Also, use STM for memory errors.

Re: memory error in my root log file

Patrick Wallek — Thu, 31 Jul 2008 02:41:51 GMT

The cause and the recommendation are described very well here.

You should call HP and have them check your RAM. You have at least 1 DIMM that probably needs to be replaced.

Re: memory error in my root log file

Torsten. — Thu, 31 Jul 2008 04:09:56 GMT

Most of the attached log is not related.

Try

echo "selclass qualifier memory;info;wait;infolog" | /usr/sbin/cstm

to get some details, but obviously you have a problem with bad memory.
Ask support for analyzing and replacement.

Re: memory error in my root log file

ng_7 — Thu, 31 Jul 2008 04:44:53 GMT

echo "selclass qualifier memory;info;wait;infolog" | /usr/sbin/cstm

result as per attached

Re: memory error in my root log file

V. Nyga — Thu, 31 Jul 2008 08:46:27 GMT

Hi,

your RAM/DIMM in slot 1b is defect.
As told in your log file, the os can correct a number of memory errors (256).
You have 241 different errors now.

If you get more than 256, your ws can hang up.

So if you need a high availability you should change this DIMM soon.
If you don't have a support contract, you also can lower your RAM from 4GB to 3GB - remove the DIMMs in slot 1b and 1a and move DIMMs from 2a/b to 1a/b.

Volkmar

Re: memory error in my root log file

Fabio Ettore — Thu, 31 Jul 2008 09:03:18 GMT

Hi,

EMS events are great because they are very detailed. I (we) suggest following the Recommended Action and check memory, that error is an HW problem about memory and you should open a call by HP asap.

Best regards,
Fabio