Glance High Memory

[Art Satter]

I am running HP unix 10.10. In glance I am seeing 'Mem Util 90%'. CPU and Disk is at between 10% and 15%. Is there any way to track down what is using the memory? I have used glance through sam, and I don't see any process that seems to be using an excessive amout of memory.

[Tom Danzig]

Use "ps -elf" and look at the SZ column

- or -

use "ipcs -mob" and look for large shared memory segments

[James R. Ferguson]

Hi Art:

Things don't look too bad. The easiest way to evaluate memory on a per-process basis is this descending listing:

# UNIX95= ps -e -o ruser,vsz,pid,args|sed '1d'|sort -rnk2

Note the XPG4 (UNIX95) variable is armed only for the 'ps' command line. There is a blank after the UNIX95= without any semicolon.

You could regain some memory, too, by reducing (at the expense of more I/O) the buffer cache. From your posting, it looks like you probably have a 15-20% ceiling for 'dbc_max_pct'. You could drop this slightly to regain a bit more memory.

Regards!

...JRF...

[Bill Hassell · Accepted solution]

Don't worry about memory usage except for the buffer cache. If the buffer cache is about 200-400 megs (and less than 20% of RAM), you are fine. 100% memory usage is also fine. Instead, look at page-outs in the Memory screen. If they remain at 0 or single digits, no problem.

However, once page-out start hitting 30-80 or higher for long periods, you are in need of siginificant amounts of new RAM. For the Progress database, depending on the user count and work areas, you may need 3000 to 4000 megs of RAM to prevent serious slowdowns due to paging.

[harry d brown jr]

Along with the great adive everyone has given you, may I suggest you think about bringing your machine into line with 10.20 at least?


live free or die
harry