#36197 [Bgs->Opn]: php does not free script memory when the process alive

ID: 36197 User updated by: momo@php.net Reported By: momo@php.net -Status: Bogus +Status: Open Bug Type: Apache related Operating System: gentoo 2005.1 PHP Version: 5.1.2 New Comment: Thank for the replay, but please read my question carefully. I know that php free the allocated by emalloc memory on the end of script, my question was why php don't do it for the memory that was allocated by the *php end user* just like the example i give above. Yes you can call it feature, and blame linux mm, but the fact that php do it for the memory used by the extensions developers, give me a hint that may there is simple way protecting the end user to not kill his server as well, especially when we talk about linux+apache 1.3.x that AFAIK it the most common configuration of production php web servers. (sorry for opening the bug again, if you will change the status of the bug to 'will not fix', i'll let him die) Previous Comments: ------------------------------------------------------------------------ [2006-01-31 16:12:08] iliaa@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php PHP uses an internal memory memory manager, when you allocate memory using emalloc() it'll be freed at the end of the request, even if you don't free it explicitly yourself. ------------------------------------------------------------------------ [2006-01-30 12:24:33] momo@php.net My apology of being nagger but the bellow code, use memory (even without inner free) that become free right after the script execution ending. is there a problem to get back the php varibles memory, just like the efree do? PHP_FUNCTION(momo_test) { char *some_memory; int a; some_memory = (char *) emalloc(0x4000000); for(a=0;a<0x4000000;a++) some_memory[a]=0; //efree(some_memory); } Can you send me more exact reference how the linux memory allocation responsible for this spend memory? ------------------------------------------------------------------------ [2006-01-29 16:07:05] sniper@php.net Expected behaviour. Search more information how memory allocation and freeing works in Linux from the web..and also 'man ps' ------------------------------------------------------------------------ [2006-01-29 09:08:18] momo@php.net Description: ------------ while playing with big arrays, i see that memory that was used on php with apache 1.3 sapi doesn't became free till the next time apache use *the same* process. here how the memory looks like *after* the scripts have finish to run: momo@(none) htdocs # ps -A v|grep http 27677 ? Ss 0:00 0 4188 8875 4532 0.8 /www5/bin/httpd 27679 ? S 0:00 0 4188 8875 3072 0.5 /www5/bin/httpd 27680 ? S 0:03 1 4188 31759 26580 5.1 /www5/bin/httpd 27681 ? S 0:00 0 4188 54019 48740 9.4 /www5/bin/httpd 27682 ? S 0:00 0 4188 8875 2532 0.4 /www5/bin/httpd 27683 ? S 0:00 0 4188 8875 2536 0.4 /www5/bin/httpd 27716 ? S 0:00 0 4188 8875 2536 0.4 /www5/bin/httpd 27764 pts/0 R+ 0:00 0 57 1406 436 0.0 grep http Reproduce code: --------------- for($a=0;$a<1024*512;$a++) { $ret[] = 1.1; } ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=36197&edit=1