CODEWITHSUNDEEP
phpmemory
RoyHu
RoyHu

Reputation: 333

the same php script executing , different memory required

When i running the following php script to do some statistics in my local machine, it works well with init_set('memory_limit', 100M),

however, when i executing the same php script in another web server, dealing with the same files(i am sure about this), it doesn't work.

I change the memory_limit to 1000M ,it still doesn't work, giving exception : "Fatal error: Allowed memory size of 1048576000 bytes exhausted (tried to allocate 32 bytes)". Finally i change to init_set('memory_limit', 1300M), it works!

The php versions in the two mahchine are the same as :

PHP 5.3.6 (cli) (built: Mar 28 2012 02:18:34) 
Copyright (c) 1997-2011 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2011 Zend Technologies
    with eAccelerator v0.9.6.1, Copyright (c) 2004-2010 eAccelerator, by eAccelerator

The following is the main script:

     protected function _insertTable($logType, $conf, $logFileName) {


        $logPath = $this->_getLogDirPath($logType, $conf) . DIRECTORY_SEPARATOR . $logFileName;
        $fileContent = file_get_contents($logPath);
        if ( !fileContent ) return;

        $fields = array_keys($conf['fields']);

        $dao = new dao\StatLogDao($this->_entities[$logType]);

        $lines = explode("\n", $fileContent);
$fileContent = null;
        unset($fileContent);
        foreach ( $lines as $line ) {
            $line = trim($line);
            if ( !$line ) continue;

            $lineData = explode($conf['glue'], $line);
            if ( !$lineData[0] ) continue;

            $entity = $this->_getEntity($logType);
            foreach ($fields as $k => $f) {
                $entity->$f = $lineData[$k];
            }

            try {
              $dao->replace($entity, $fields);
            } catch (Exception $e) {
                echo $e->getMessage() . "\n";
            }
$entity = null;
            unset($entity);
$line = null;

            unset($line);
        }
$lines = null;
        unset($lines);
$dao = null;
        unset($dao);
    }

I'm totally confused, it seems 'unset' won't free enough memory, plz help me out. Many thanks!!

Upvotes: 3

Views: 202

Answers (1)

powtac
powtac

Reputation: 41050

You probably have different modules installed...

A lot of more things can cause your script to crash (is seems like a endless loop):

  • different user rights for the webserver executing the script
  • different PHP.ini settings for access of remote servers (safe_mode...)
  • The file you want to access has different read rights
  • Different MySQL Server version
  • Different MySQL user / table / ... rights

I'm pretty sure the error you are receiving is because your script goes wrong and not because of different memory usage. You also should check if the allowed memory size memory_limit is really editable via ini_set(). Check it with echo ini_get('memory_limit'); on both machines after you try to set it.

To be really sure that both of the servers are "same" dump the output of phpinfo(); into two files and do a diff on them! Only the server names, unique ids and some dates should be different...

Upvotes: 2

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