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Posted by ljb on 04/24/07 00:47
brunobgDELETETHIS@users.sourceforge.net wrote:
> I'm using PHP to run a CLI application. It's a script run by cron that
> parses some HTML files (with DOM XML), and I ended up using PHP to integrate with
> the rest of the code that already runs the website.
>
> The problem is: it's eating more memory than a black hole. It eats the
> current limit of 256MB set in php.ini, in an application that would hardly
> consume 4MB if written in C. I don't care if this application takes much longer
> to run than it would in C, but eating that much memory is not acceptable.
>
> So, my question is, how do I find out what is eating that much memory?
> I'm suspicious of memory leaks, or very stupid garbage collection. Any help?
Different sort of problem, but I struggled with a long-running script that
leaked a bit of memory on each loop, and after a few days/weeks was using
too much memory. What I had to do was "instrument" the PHP script,
inserting calls to report current memory usage at frequent intervals. There
are two ways to do this. memory_get_usage() might be available (depends
on how PHP was built), but I think it only reports memory used by PHP
allocators. (Didn't help me, because the leak turned out to be in a loaded
extension.) The other way (on Linux, for example) is to look at
/proc/meminfo for total memory usage. Do this often enough in your script,
and you should be able to narrow down where the memory is being lost.
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