PHP Fatal error: Allowed memory size of 134217728 bytes exhausted Post: 302468375

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Top Forums Web Development PHP Fatal error: Allowed memory size of 134217728 bytes exhausted Post 302468375 by Neo on Tuesday 2nd of November 2010 01:33:55 PM

11-02-2010

Administrator

OK, finally, 8 months after posting this php memory bug, I figured it out, hahaha.

Basically, I used the PHP error_log() function to print the memory allocation using memory_get_usage() and discovered that an array was using a lot of memory, and traced it to $string (using strlen($string) in the debug log) that was passed to the function used in a regex to create the array.

As a temporary fix, I created a PHP conditional to test the memory usage and avoid the offending foreach statement until I could come up with a solution (debugging the entire process, step-by-step).

The solution was to simply define MAX_STR and take a sub string of the huge $string with substr($string,0,MAX_STR), which was using all the memory in the foreach loop in the function.

Then, to clean up, I defined MAX_MEM to insure that the maximum memory of this PHP thread would alway be less than the max PHP memory allocated in the php.ini file.

PHP Code:


define('MAX_STR',512000);
define('MAX_MEM',96000000);
$string = substr($string,0,MAX_STR);
if(memory_get_usage() < MAX_MEM){//blah blah}

Housekeeping work... done!

Neo

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LEARN ABOUT PHP

apache_child_terminate

APACHE_CHILD_TERMINATE(3)						 1						 APACHE_CHILD_TERMINATE(3)

apache_child_terminate - Terminate apache process after this request

SYNOPSIS

       bool apache_child_terminate (void  )

DESCRIPTION

       apache_child_terminate(3)  will register the Apache process executing the current PHP request for termination once execution of PHP code is
       completed. It may be used to terminate a process after a script with high memory consumption has been run as memory will  usually  only	be
       freed internally but not given back to the operating system.

RETURN VALUES

	Returns  TRUE  if  PHP is running as an Apache 1 module, the Apache version is non-multithreaded, and the child_terminate PHP directive is
       enabled (disabled by default). If these conditions are not met, FALSE is returned and an error of level E_WARNING is generated.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.4.0	|						    |
       |	|						    |
       |	|  This function became  available  under  FastCGI. |
       |	| Previously,  it  was	supported only when PHP was |
       |	| installed as an Apache module.		    |
       |	|						    |
       +--------+---------------------------------------------------+
NOTES

       Note

	      This function is not implemented on Windows platforms.

SEE ALSO

       exit(3).

PHP Documentation Group 												 APACHE_CHILD_TERMINATE(3)