Re: PHP 4.0 Bug #8889: Memory is not being freed.
| From: | Rasmus Lerdorf | Date: | Sun, 28 Jan 2001 06:23:37 +0000 |
| Subject: | Re: PHP 4.0 Bug #8889: Memory is not being freed. | ||
| References: | 1 | Groups: | php.dev |
| Request: | Send a blank email to php-dev+get-45275@lists.php.net to get a copy of this message | ||
> It is not a leak exactly but more of a greed. It seems to be a
> semi-intentional but not necessary thing. It seems that the way Zend/PHP is
> allocating memory is not allowing it to be returned to the system. Once PHP
> has some memory it will not let it go, but it will reuse it. So, if a
> script takes up a good chunk of memory, it is never returned to the system
> unless that httpd process is killed or dies.
Right, this is standard. But this does not explain incremental memory
usage. Memory is marked as free and re-used. It does not need to be
returned to the system for it to be re-used. So the memory usage for any
one process should never exceed the memory usage of your most memory
hungry script.
-Rasmus