topic Re: dm_memory in Operating System - HP-UX

dm_memory

Javier Ortiz Guajardo — Wed, 20 Nov 2002 17:51:26 GMT

I,ve received this message event.

Description of Error:

The Page Deallocation Table (PDT) is 100% full.

PDT Entries Used: 50
PDT Entries Free: 0
PDT Total Size: 50

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.

This mean i have a hardware problem?

If someone can explains this, i appreciate so much.

thanks.

Re: dm_memory

S.K. Chan — Wed, 20 Nov 2002 18:04:05 GMT

Potentially it could indicate a hardware problem. The PDT shows which memory pages have been deallocated due to memory errors. And this error can be a single-bit and/or double bit memory errors. When the errors are found the memory pages are deallocated and the PDT is updated hence you see these errors. What you need to do it get into STM and check the memory error log.
# cstm
cstm> map
cstm> sel dev
cstm> info
cstm> infolog
You should see a list of "errors table". If there are a lot of entries/errors (say more than 10 or so) then I suggest you give a call to HP.

Re: dm_memory

Jeff Schussele — Wed, 20 Nov 2002 18:48:35 GMT

Hi Javier,

Yes, there's a high chance that you have a memory module that's going bad. That many deallocations could definitely point to this scenario.
I'd log a HW call to the response ctr & let them analyze the situation.
The risk of moving forward without doing anything is that you now have NO table space left to deallocate the next bad memory page which could lead to a panic.

Rgds,
Jeff

Re: dm_memory

Ian Kidd_1 — Thu, 21 Nov 2002 02:57:44 GMT

Yes, you're most likely going to have to replace memory on your server. By the way, a simple reboot generally will not clear out your Page Deallocation Table. This is need to be done in the PDC. The HP FE should be able to do this, but if not, I believe the location to do this is in SERvice