Re: [PHP4BETA] PHP4b3 RC3 Memory usage

I am using persistent connections to MySql ... in both php3 and 4 though .. so that shouldnt realy make the difference unless the implimentation of mysql_pconnect changed.. :) also ill try to cc these messages to php4beta and phpdev :) ill have to subscribe to the dev list first though, which i hadnt yet cause of its high trafic :) -- Chris ----- Original Message ----- From: Andi Gutmans <andi@zend.com> To: Chris Chabot <chabotc@reviewboard.com> Sent: Monday, November 15, 1999 18:56 Subject: Re: [PHP4BETA] PHP4b3 RC3 Memory usage > Weird. By the way you should probably have these emails also go to > php4beta nd php-dev. Maybe someone there has encoutnered similar > behaviour. Anychance you can find what is causing this growth? Maybe you > are using persistent connections? > > Andi > > > > On Mon, 15 Nov 1999, Chris Chabot wrote: > > > Well yes, im prety sure its actualy bigger in memory usage :)) very simple way > > to prove it, on php3 i can run 90 processes without running out of memory, and > > with php4b3 RC-n i can only do around 45 till it starts hitting swap like crazy > > ... > > > > the shared part of the memory is about 1300 Kbytes .... of 7000 total on my > > bigest scripts ... that leaves 5700Kbytes of memory consumtion :)) > > > > After disabling the growth is still there yes ... see previsous email which > > included all the posible test combinations .... the stabilisation just doesnt > > happen ... it bounces between 5000k and 7000k ... and performing a lot slower :) > > > > -- Chris > > > > > > Andi Gutmans wrote: > > > > > 16 bytes is probably pretty much the minimum the "maximum cache block size" > > > should be tuned to, because the main Zend value container (zval) is that > > > size and it is most frequently allocated/deallocated. > > > By the way, are you sure that PHP is actually taking more memory? When the > > > process forks then most of that memory is copy-on-write and isn't really > > > allocated. Only what is being used by the program is allocated. I can't > > > think of what has really changed memory consumption wise except maybe > > > improved in PHP 4.0. > > > After disabling the memory cache do you still see the process growing > > > during the first few K of requests and stabalizing? > > > > > > Andi > > > > > > At 11:35 PM 11/13/99 +0100, Chris Chabot wrote: > > > >As you could read in my previous email, it does make a 100 to 200k > > > >difference, but at a very large expense of speed on smaller scripts (on my > > > >box the difference between 50 requests/second and 400 requests a second..) > > > >So ofcource an option is always a good thing, but would you want people to > > > >switch that on ? :)) > > > > > > > >--------------------------------------------- > > > > Chris Chabot > > > > CTO, The Reviewboard Magazine > > > > e-mail: chabotc@reviewboard.com > > > >--------------------------------------------- > > > > > > > >----- Original Message ----- > > > >From: Andi Gutmans <andi@zend.com> > > > >To: Rasmus Lerdorf <rasmus@lerdorf.on.ca> > > > >Cc: Chris Chabot <chabotc@reviewboard.com>; Sascha Schumann > > > ><sascha@schumann.cx>; <php4beta@lists.php.net> > > > >Sent: Saturday, November 13, 1999 18:01 > > > >Subject: Re: [PHP4BETA] PHP4b3 RC3 Memory usage > > > > > > > > > > > > > At 12:03 AM 11/11/99 -0500, Rasmus Lerdorf wrote: > > > > > >If these prove to make a significant difference in his case, we should > > > > > >probably make them compile-time configurable options and document the > > > > > >performance/memory tradeoffs. > > > > > > > > > > Yeah but I don't think it makes more than max. 100-200kb of a difference. > > > >I > > > > > just want to make sure. > > > > > > > > > > Andi > > > > > --- > > > > > Andi Gutmans <andi@zend.com> > > > > > http://www.zend.com/ > > > > > > --- > > > Andi Gutmans <andi@zend.com> > > > http://www.zend.com/ > >