Re: memory leaks when using FAST CGI + Apache + Perl

2006/8/10, Igor <[email protected]>:
> Hello Alexey,
>
> Thursday, August 10, 2006, 11:38:41 AM, you wrote:
>
> AM> We are using Apache 2 + FAST CGI + Perl.
> AM> Recently we have noticed memory leak in our web application. When we
> AM> `top' on web server it could be seen that memory allocated by user.cgi
> AM> process keep growing up to 100-300 Mb.
>
> AM> I would be very appreciate for any help
>
>     It might be a Fast CGI leak, but you would have to examine your
>     script's logic first, you may use Data::Dumper to do that. In most
>     cases developers forget that FastCGI application is running in
>     a loop and does not free memory after each web call, therefore the
>     memory leakage that was hidden so far becomes perceptible.

I know that; We have faced memory leak just recenty; of course I tryed
to use Data::Dumper, Devel::Peak, Devel::FindGlobals, etc,
but we have about dozens of modules and thousands of code lines, it
migth be trouble ti dump it all ;-) and esle unfortunately we use perl
globals;


>
>     And since  developers are often refactoring their CGI into FastCGI
>     this might be the cause of your memory leakage.
>
>     If the scripts is all right then it would be a good idea to check out
>     another Perl bundle.
>

We can't, project is too large to switch on another bundle;

>     And only if everything checked out all right the suspicions might
>     fall on Fast-CGI environment.
>
>     BTW will this code eat memory?
>
>     #!/usr/bin/perl
>
>     use CGI::Fast;
>     &do_some_initialization();
>     $ENV{FCGI_SOCKET_PATH} = "localhost:8888";
>     $ENV{FCGI_LISTEN_QUEUE} = 100;
>     while ($q = new CGI::Fast) {
>
>     }



>
> >    also I have to deal with memory allocations by C fucntions, used in Perl;
>
>      And this might be the trouble as well. Just run your script in a
>      for(;;){}; without any fast-cgi at all.
>

That's good idea;

> --
> Best regards,
>  Igor                            mailto:[email protected]
>
>


-- 
Alexey Melezhik
___________________________________
fastcgi-developers mailing list
http://fastcgi.com/fastcgi-developers/