topic Re: memory problem in Operating System - HP-UX

memory problem

Arman Mahboobi — Thu, 05 Dec 2002 01:41:13 GMT

Is there a anyway I can see what is in the system memory.

We've receintly been running out of lockable memory.

eg: yesterday at about 15:20 ran the following

echo "lockable_mem/D" | adb /stand/vmunix /dev/kmem

and got
lockable_mem: 123790 free pages

ran the command again this morning @ 8:20 and go

lockable_mem: 82920

How can I check to see what is taking up the space.

I'm a first timer - Thanks.

Re: memory problem

Rajeev Shukla — Thu, 05 Dec 2002 02:01:42 GMT

The simple one would be to see in "dmesg" command or "swapinfo" command.
Or write a C program to extract data from pst_static structure and get the data by printing
printf("physical_memory: %lu\n", pst.physical_memory);

Cheers
Rajeev

Re: memory problem

Rajeev Shukla — Thu, 05 Dec 2002 03:27:55 GMT

Run top or if you have glance plus use that or use sar to see the memory usage by process.

cheers
rajeev

Re: memory problem

T G Manikandan — Thu, 05 Dec 2002 04:53:44 GMT

What is the value of nproc on the system.Be sure that the value is not too high which reduces the lockable memory.

Re: memory problem

Arman Mahboobi — Thu, 05 Dec 2002 22:44:34 GMT

Thanks Rajeev - however I would like to know "what" is in memory (like top or glance) rather than how much memory is free or used.

T G - the kernel tunables for memory are set to the default formulas which mostly depend on maxusers.

Could it be some sort of caching or buffering, I have lost another 40 mb of lockable memory since last night?

Re: memory problem

Rajeev Shukla — Thu, 05 Dec 2002 23:29:45 GMT

If you dont have Glance or Perfview better use top. Top by default gives 16 process so use top with -n (no process) -f (File_name). .
no of process you can find by putting a count on "ps".
This top redirects output to a file and the you can see the user running the process, how much memory is used what is the NICE etc..

Cheers
Rajeev