Re: how to find a memory corruption in php ?

On Sun, Apr 3, 2011 at 12:20 PM, Pascal COURTOIS <Pascal.Courtois@nouvo.com> wrote: > Le 01/04/2011 18:46, Pascal COURTOIS a écrit : >> Le 01/04/2011 15:20, Pierre Joye a écrit : >>> hi, >>> >>> In php 5.3+ the memory limit default is 256MB, not 128MB. 5.3 does not >>> necessary use more memory but actually uses and reports its usage more >>> efficiently. I would suggest to use this default value and try again. >> >>   the exact same bug occurs whatever the limit set. Anyway, when it works >> it's ok with 6MB so it's not a matter of quantity obviously. > > further investigations show that my program uses around 3Mbytes of memory BUT > real_usage memory increases constantly which could suggest either a bug in the > zend memory manager or a very special condition in my php program making the > memory manager unable to use holes in its system allocated memory. > > the use of gc_collect_cycles() as suggested privately does not make any difference. Try to run it by disabling the zend memory manager: USE_ZEND_ALLOC=0 valgrind php --leak-check=full sapi/cli/php ... (or httpd if you use apache or only reproducible there) That will tell you if there are actual leaks. See Zend/README.ZEND_MM for more details Cheers, -- Pierre @pierrejoye | http://blog.thepimp.net | http://www.libgd.org