Do you know about the /status/size URL in TclHttppd?
This will count up the bytes used for Tcl variables and procedures.
I'm not sure how good the 3.0.3 version is, but you can easily slip
in the attached version of status.tcl. (I realize that my 3.1.0 release is
as yet unreleased.)
>>>Matthew Krenzer said:
> I'm using the Feb 21 2000 version of Tnm w/ tcl8.3.2 on a linux system
> w/ kernel 2.0.38. We are having a very
> strange memory leak, and I'm hoping someone out here might be able to
> help us out.
> We are using TNM allong with tclhttpd 3.0.3, so it is a long running
> process. We set up a job that performs several async snmp requests on
> several different switches every 30 seconds. The snmp values returned
> are then formated for viewing through the web server.
> In general, the memory usage is fairly constant (slightly increasing),
> except that every few hours there is a huge increase in the memory
> usage. Over one weekend we went from using about 10M to over 50M of
> memory. I have scoured my code looking for anything that could be
> guilty of this, but I have met with little sucess.
> Hr. Memory
> 1 10220
> 2 12080 <- big jump
> 3 12284
> 4 12392
> 5 12412
> 6 12776
> 7 13724 <- Big jump
> 8 13960
> 9 13964
> 10 14196
> 11 14224
> 12 14312
> 13 15424 <- Big jump
> 14 15588
> 15 15696
> 16 15696
> 17 16720 <- Big jump
> 18 16720
> 19 17744 <- Big jump
> Dose anyone have any clue as to what might cause this? Is there any
> thing I might be doing in TCL that could cause these results? TCL is
> suposed to handle memory management for me, right? As long as I'm not
> doing something like creating variable with a timestamp in the name, I
> shouldn't really be getting a leak like this, right? That leaves me
> with only the hope that something might be found in the libraries I'm
> using - like TNM. Are there known issues with using TCL in long
> running proccess that I should know about? We have about 6 TCL books
> here at our disposal and only one of them even mentions the word
> 'memory' in the index.
> I use the following Tnm commands: snmp, mib, job, icmp, and dns. We
> also use the Thread library, TclX, and, as said above, tclhttpd.
> As for the question of if we are doing anything with a period of one
> or two hours, the answer is no. The only periodic jobs (in the
> program) are run every 30 seconds and 5 minuts. Either of those
> should show a constant increase in memory usage in the table above.
> But that dosn't happen. Is there anything else going on behind the
> I have written several little scripts to test for memory leaks in
> several of the libraries, but to avail. We have searched and searched
> with no luck. Any insight would be great. Thank you.
-- Brent Welch <email@example.com>
Scriptics changes to Ajuba Solutions
scriptics.com => ajubasolutions.com
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