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Digg  memory_get_usage
Returns the amount of memory allocated to PHP
(PHP 4 >= 4.3.2, PHP 5)
Example 1846. A memory_get_usage() example<?phpCode Examples / Notes » memory_get_usagemagicaltux
When you need to get the OS, do not use $_SERVER['OS'] or $_ENV['OS'], better use PHP_OS constant ! <?php if (substr(PHP_OS,0,3)=='WIN') { // [...] } ?> You also have other values such as CYGWIN_NT-5.0, Linux, ... this is the best way to get system's os (anyone on linux can do an "export OS=windows") sandeepc
To get this in pre 4.2.3 do a (works on unix like systems only): $my_pid = getmypid(); error_log("MEMORY USAGE (% KB PID ): ".`ps -eo%mem,rss,pid | grep $my_pid`); found this tip somewhere in bugs.php.net! e dot a dot schultz
This is a function that should work for both Windows XP/2003 and most distrabutions of UNIX and Mac OS X. <?php if( !function_exists('memory_get_usage') ) { function memory_get_usage() { //If its Windows //Tested on Win XP Pro SP2. Should work on Win 2003 Server too //Doesn't work for 2000 //If you need it to work for 2000 look at http://us2.php.net/manual/en/function.memory-get-usage.php#54642 if ( substr(PHP_OS,0,3) == 'WIN') { if ( substr( PHP_OS, 0, 3 ) == 'WIN' ) { $output = array(); exec( 'tasklist /FI "PID eq ' . getmypid() . '" /FO LIST', $output ); return preg_replace( '/[\D]/', '', $output[5] ) * 1024; } }else { //We now assume the OS is UNIX //Tested on Mac OS X 10.4.6 and Linux Red Hat Enterprise 4 //This should work on most UNIX systems $pid = getmypid(); exec("ps -eo%mem,rss,pid | grep $pid", $output); $output = explode(" ", $output[0]); //rss is given in 1024 byte units return $output[1] * 1024; } } } ?> guenter_doege
The Win XP / 2003 workaround script will also work with windows 2000 with a few slight modifications. Please note that you'll need the pslist.exe utility from http://www.sysinternals.com/Utilities/PsTools.html because win/2000 itself does not provide a task list utility. <?php function getMemUsage() { if (function_exists('memory_get_usage')) { return memory_get_usage(); } else if ( substr(PHP_OS,0,3) == 'WIN') { // Windows 2000 workaround $output = array(); exec('pslist ' . getmypid() , $output); return trim(substr($output[8],38,10)); } else { return '<b style="color: red;">no value</b>'; } } ?> joe
the various memory_get_usage replacements here don't seem to work on Mac OS X 10.4(Intel) I got it to work like this... function memory_get_usage() { $pid = getmypid(); exec("ps -o rss -p $pid", $output); return $output[1] *1024; } ad-rotator.com
The method sandeepc at myrealbox dot com posted yields larger memory usage, my guess is that it includes all the PHP interpreter/internal code and not just the script being run. 1) Use ps command MEMORY USAGE (% KB PID ): 0.8 12588 25087 -> about 12MB 2) Use memory_get_usage() int(6041952) -> about 6MB php_dev
Regarding the function posted by e dot a dot schultz at gmail dot com I am running XAMPP on a windows box and the memory usage that the function is giving me is for the entire instance of apache.exe. Thats a lot more memory than my single PHP process. Maybe this works as expected on IIS, but not on apache! (I am getting a report of about 26MB on win vs. only 700k on Linux). john ring
Oops, that was a question. I'll change it to a note simply: Note: This is NOT enabled at all in the Win32 builds. Best regards grey - greywyvern - com
If nothing else in the user notes below works for you, you can get a very (VERY) rough estimate of PHP memory usage by outputting the $GLOBALS array, stripping it of indentation whitespace, and counting the characters in the resulting string. This method has a very high overhead (to be expected), but works on all operating systems, regardless of whether or not they have the --enable-memory-limit config option set. I find that the syntax overhead of the print_r() statement roughly accounts for the PHP runtime base memory usage. The code below is set up to work on all arrays, not just the $GLOBALS array. Keep in mind that outside data referenced by resource IDs, such as database results and open file data, is not included in this total. <?php function array_size($arr) { ob_start(); print_r($arr); $mem = ob_get_contents(); ob_end_clean(); $mem = preg_replace("/\n +/", "", $mem); $mem = strlen($mem); return $mem; } $memEstimate = array_size($GLOBALS); ?> Use only if being off to either side by at least 20% is acceptible for your purposes. randolphothegreat
I'd just like to point out that although sandeepc at myrealbox dot com's idea for displaying the current memory usage is a good one, it's perhaps a bad idea to pipe the entire process list through grep. A better performing method would be to select only the process we're interested in: <? $pid = getmypid(); error_log('MEMORY USAGE (% KB PID ): ' . `ps --pid $pid --no-headers -o%mem,rss,pid`); ?> True, it's not much of a performance boost, but every bit helps. vesa dot kivisto
I was unable to get the previous examples working properly and created code which works at least for me. Enjoy! // Please note that you'll need the pslist.exe utility from http://www.sysinternals.com/Utilities/PsTools.html // This is because win/2000 itself does not provide a task list utility. // function getMemoryUsage() { // try to use PHP build in function if( function_exists('memory_get_usage') ) { return memory_get_usage(); } // Try to get Windows memory usage via pslist command if ( substr(PHP_OS,0,3) == 'WIN') { $resultRow = 8; $resultRowItemStartPosition = 34; $resultRowItemLength = 8; $output = array(); exec('pslist -m ' . getmypid() , $output); return trim(substr($output[$resultRow], $resultRowItemStartPosition, $resultRowItemLength)) . ' KB'; } // No memory functionality available at all return '<b style="color: red;">no value</b>'; } webnospamsjwans
A quick and dirty Windows XP / 2003 wordaround: <?php function getMemUsage() { if (function_exists('memory_get_usage')) { return memory_get_usage(); } else if ( strpos( strtolower($_SERVER["OS"]), 'windows') !== false) { // Windows workaround $output = array(); exec('tasklist /FI "PID eq ' . getmypid() . '" /FO LIST', $output); return substr($output[5], strpos($output[5], ':') + 1); } else { return '<b style="color: red;">no value</b>'; } } ?> xolox
<?php // Original from http://php.net/memory_get_usage by websjwans at hotmail dot com. Thanks alot! if ( ! function_exists( 'memory_get_usage' ) ): // Only define function if it doesn't exist function memory_get_usage() { // If we are running on Windows if ( substr( PHP_OS, 0, 3 ) == 'WIN' ): $output = array(); // Should check whether tasklist is available, but I'm lazy exec( 'tasklist /FI "PID eq ' . getmypid() . '" /FO LIST', $output ); // Filter non-numeric characters from output. Why not use substr & strpos? // I'm running Windows XP Pro Dutch, and it's output does not match the // English variant, as will all other translations. This is a more generic // approach, and has a better chance of actually working return preg_replace( '/[^0-9]/', '', $output[5] ) * 1024; // Tasklist outputs memory usage in kilobytes, memory_get_usage in bytes. // So we multiply by 1024 and in the process convert from string to integer. else: return false; endif; } endif; ?> Works for me. Functionality should match memory_get_usage(), albeit slower (exec & regex). Have fun! - Peter Odding |
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