Trying to identify processes that hogs the memory

[Bibi]

Our system, HP-UX B.11.11 U 9000/800, with 8 GB of Memory, is constantly having memory utilization issues with free memory running 97096K or below. With glance, I identifed our Sybase dataservers were some of the resources that was hogging memory, and we changed the named cache to less than 1 gb for our 2 dataservers. That should leave us with 6 gb still left. However, this morning, again, after the change, the memory utilization had crept up to 99%.

Question...What is the best way to identify the processes that are eating the resources?

[RAC_1]

UNIX95= ps -ef -o "vsz,ruser,pid,args"|sort -nr will give you list of the processes sorted on memory usage. The vsz value is in KB. Also glance -g and glance -m will give good idea about which processes are cauing problem.

What are your settings for buffer cache? What is the swap space that you have configured?

Anil

[Steven E. Protter]

I'd start with glance. You can drill into the processes and see how much memory they are using.

The gui, gpm is a little more useful for this.

You can use lsof to help identify the processes. http://hpux.connect.org.uk/hppd/hpux/Sysadmin/lsof-4.70/

I would look at the database setup files and see what the memory limits are.

SEP

[Bibi]

Thank You...both replies valuable. Will also install SAR. Appreciate the feedback.

Thanks,
Bibi

[Geoff Wild]

Here's a little script I use - similiar to above:

cat top10
#/bin/sh
UNIX95= ps -e -o "vsz pcpu ruser pid stime time state args" | sort -rn |head -10


Rgds...Geoff

[Mark Greene_1]

If you don't have a license for glance, you should have Top. What version of what Sybase product are your running, and have you search Sybase's website to see if this is a known configuration or patch issue?

mark

[Ted Buis]

PRM might be useful to limit the memory usage of a process that doesn't behave nicely on its own. If you have the Enterprise Operating Environment for 11.11, then you have both Glance and PRM.

[Steve Steel]

Hi


Look at

Memory Usage (â What is using all of the memoryâ ?)

by:eric.herberholz@hp.com

Last modified: March 23, 2004

Latest version also available at external ftp site:

ftp://eh:spear9@hprc.external.hp.com/memory.htm



Also unix95 is great

1 #!/usr/bin/ksh
2 #
3 # Show processes sorted by size of core image
4 #
5 # Usage:
6 # psram [ quantity ]
7 #
8 # where quantity is the top RAM processes to show (default is 20)
9 #
10 set -u
11 if [ $# -gt 0 ]
12 then
13 TOPPROCS=$1
14 else
15 TOPPROCS=20
16 fi
17
18 MYNAME=$(basename $0)
19 TEMPFILE=/var/tmp/$MYNAME.$$
20 trap `rm -f $TEMPFILE > /dev/null 2>&1` 0 1 2 3 15
21
22 UNIX95= ps -e -o ruser,vsz,pid,args > $TEMPFILE
23 head -1 $TEMPFILE
24 DASH5="-----"
25 DASH25="$DASH5$DASH5$DASH5$DASH5$DASH5"
26 echo "$DASH5---- $DASH5- $DASH5 $DASH25$DASH25"
27 grep -v "VSZ COMMAND" $TEMPFILE \
28 | cut -c -78 \
29 | sort -rn -k2 \
30 | head -${TOPPROCS}
31 rm $TEMPFILE > /dev/null 2>&1
32 #### END OF SCRIPT


Steve