Tools/scripts to find out Memory Leakage

[Sandip Ghosh]

Hi,

We are running a K460 with HP-UX 10.20 and Oracle 8.0.5.

Through "sarcheck" it is showing that there may be some memory leakage in some programs.

Do you know is there any tools/scripts to find out the memory leakage?

thanks in advance.
Sandip

[harry d brown jr]

Glance/measureware

live free or die
harry

[Bill McNAMARA_1]

there is an internal tool called vmtrace that could help, but patching your system to the latest and greatest would be a first step.

Later,
Bill

[S.K. Chan]

See attached doc .. it may help ..

[Christopher Caldwell]

For pay,
look at Purify and Insure++
Buyer beware, things can get tricky when your either
testing an .sl that loaded with something like Oracle Application Server
or
your using code (executable or .sl) that depends on someone else's code (e.g. Oracle) and the leak is in someone elses code.

Both of these tools require you to be able to instrument your code (i.e. compile and link against special libraries).

[Sandip Ghosh]

Bill,

I could not find vmtrace in my system. Can you please let me know from where I can get this?

Sandip

[Bill Hassell · Accepted solution]

If you are reasonably up to date on patches (full patch set less than a year old), there won't be any memory leaks from the opsystem and basic commands (except the notorious mib2agt, for which there is a patch).

So you need to track down the programs that are growing in size. There's nothing magic, just a lot of record keeping. Start by sorting all your processes by memory size:

# UNIX95= ps -eo "vsz,pid,ruser,args" | sort -rn

Then have cron run this command line every 5-10 minutes, directed into a file and look for trends as the sizes get larger. NOTE: The application may have been designed to work in that manner so verify with the authors that this is expected behavior.