From: cnww at hfx dot andara dot com Operating system: Debian GNU/Linux PHP version: 5.2.0 PHP Bug Type: Arrays related Bug description: serialize() consumes insane amount of RAM
Description: ------------ When called on a tree implemented as a multi-dimensional array occupying something like 60MB of RAM serialize fails with an error like: Fatal error: Allowed memory size of 1073741824 bytes exhausted (tried to allocate 6282420 bytes) in /var/www/lib/metacache.php on line 105 So either the memory allocation system is busted or the serialization of ~60MB of data (actually the full text version is only 9.1MB) requires over 1GB of memory. Reproduce code: --------------- The line that is actually failing is: $meta_ser = serialize( &$metacache_buf ); For obvious reasons I have not posted the whole array here. I created an example program that reproduces the problem using an array of 242,919 strings made with var_export() from the directory listing of a Windows machine's D: drive. You can get the code from: http://arachne.k-pcltee.com/~cnww/serialbug.bz2 The example program seems to require around 52MB of RAM to create the array, so if you're using the default 8MB limit it will fail before it gets to the serialize() call. Any limit of 64MB or greater seems to result in it failing during serialize(). Expected result: ---------------- It should print "Exiting normally" Actual result: -------------- Fatal error: Allowed memory size of 1073741824 bytes exhausted (tried to allocate 6010844 bytes) in /tmp/serialbug.php on line 313030 -- Edit bug report at http://bugs.php.net/?id=39736&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=39736&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=39736&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=39736&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=39736&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=39736&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=39736&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=39736&r=needscript Try newer version: http://bugs.php.net/fix.php?id=39736&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=39736&r=support Expected behavior: http://bugs.php.net/fix.php?id=39736&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=39736&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=39736&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=39736&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=39736&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=39736&r=dst IIS Stability: http://bugs.php.net/fix.php?id=39736&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=39736&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=39736&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=39736&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=39736&r=mysqlcfg
