topic Re: Detect memory leak in Operating System - HP-UX

Detect memory leak

Amit Kureel — Tue, 29 May 2001 04:36:46 GMT

Can anybody tell me how to find if one of my running process has a memory leak, i.e., it is allocating memory continuously, but not freeing it ? What is the HP unix utility/command to monitor such a process ?

Re: Detect memory leak

James R. Ferguson — Tue, 29 May 2001 10:29:13 GMT

Hi Amit:

One way to spot a memory leak is to watch for growing usage by processes. The following uses the POSIX (UNIX95) options of the 'ps' command to assist in this tracking, ranking the output in descending kilobyte core size. Note that a space character follows the 'UNIX95' variable declaration and that the 'ps' command begins without any interceding delimiter. Thus, the variable UNIX95 is set only for the one command line.

# UNIX95= ps -e -o "user,vsz,pid,ppid,args" | sort -rnk2 | more

...JRF...

Re: Detect memory leak

LB4 — Tue, 29 May 2001 11:35:30 GMT

There is a great utility called sarcheck.
www.sarcheck.com

Re: Detect memory leak

boley janowski — Tue, 29 May 2001 11:51:13 GMT

James, i was just looking through my notes for that command, I figured this would be the answere for this ticket. Any way, glad you pointed it out. This is a very cool tool.

Re: Detect memory leak

Mladen Despic — Tue, 29 May 2001 13:18:38 GMT

Amit,

If you have Glance, check if you have this file

file=/opt/perf/examples/adviser/proc_mem_leak

If you do, try running

glance -adviser_only -syntax $file -j60 | tee glance.out

This will display information about potential memory hog processes every 60 seconds. Read $file for further info.

HTH