From:
Operating system: Debian Linux
PHP version: 5.4SVN-2012-01-31 (snap)
Package: Performance problem
Bug Type: Bug
Bug description:Memory leak on unserialize for nested objects
Description:
------------
Hi, this is a recurring problem in PHP when unserializing large nested
objects.
When unserializing inside a loop the same serialized object, the total
memory
consumption increases every couple of iterations. I am attaching the code
to
replicate it. Have tested it in the latest 5.4 (snap), it also occurs in
5.3.
Let me know if you need any more details,
Tested on Debian Linux 64 wheezy/sid, however I believe is platform
independent.
Couldn't find a bug category for serialize/mem leak related issues.
Test script:
---------------
<?php
$str =
base64_decode('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');
for ($i=0; $i<1000; $i++) {
echo "Iteration $i\t Mem ".memory_get_usage(true)."\n";
unserialize($str);
}
Expected result:
----------------
The memory consumption should be stable, it increases with iterations.
Actual result:
--------------
Result from script:
Iteration 0 Mem 262144
Iteration 1 Mem 524288
Iteration 2 Mem 524288
Iteration 3 Mem 524288
Iteration 4 Mem 524288
Iteration 5 Mem 524288
Iteration 6 Mem 524288
Iteration 7 Mem 786432
Iteration 8 Mem 786432
Iteration 9 Mem 786432
Iteration 10 Mem 786432
Iteration 11 Mem 786432
Iteration 12 Mem 786432
Iteration 13 Mem 786432
Iteration 14 Mem 1048576
Iteration 15 Mem 1048576
--
Edit bug report at https://bugs.php.net/bug.php?id=60937&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=60937&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=60937&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=60937&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=60937&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=60937&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=60937&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=60937&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=60937&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=60937&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=60937&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=60937&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=60937&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=60937&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=60937&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=60937&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=60937&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=60937&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=60937&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=60937&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=60937&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=60937&r=mysqlcfg
