> -----Original Message----- > From: wikitech-l-boun...@lists.wikimedia.org > [mailto:wikitech-l-boun...@lists.wikimedia.org] On Behalf Of > Andrew Garrett > Sent: 04 October 2009 23:07 > To: m...@aifb.uni-karlsruhe.de; Wikimedia developers > Subject: Re: [Wikitech-l] MediaWiki memory usage > > > On 04/10/2009, at 7:27 PM, Markus Krötzsch wrote: > > == How to do memory profiling? == > > > > I tried to enable PHP memory profiling in xdebug, but all I got was > > time data, and I gave up on this for now. The aggregated outputs in > > profileinfo.php were not very useful for me either; in > particular, I > > think that they do not take garbage collection into > account, i.e. they > > only show new memory allocations, but not the freeing of > old memory. > > So one piece of code may allocate 20M but never need more > than 4M at a > > time, while another consumes the same amount and keeps it > due to some > > mem leak. Especially, the sums and percentages do > apparently not show > > the real impact that a piece of code has on using PHP's memory. > > > > So I based my memory estimations on the minimal PHP memory > limit that > > would not return a blank page when creating a page preview > > (ini_set('memory_limit',...);). This measure is rather coarse for > > debugging, but it might be the one number that matters most to the
> > user. The results were reproducible. > > For future reference, you can use the memory_get_usage > function: > http://php.net/manual-lookup.php?pattern=get+memory+usage&lang=en > Memtrack extension probably more useful. http://www.php.net/manual/en/intro.memtrack.php Jared _______________________________________________ Wikitech-l mailing list Wikitech-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikitech-l
