Bug #61060 [NEW]: MySQL memory leak

From: Operating system: Windows Vista PHP version: 5.3.10 Package: MySQL related Bug Type: Bug Bug description:MySQL memory leak Description: ------------ Fetching data through mysql_fetch_assoc() causes php memory usage to go up after each query. This occurs even after unsetting the retrieved data. Test script: --------------- <?php $db = mysql_connect(DB_DOMAIN, DB_USERNAME, DB_PASS, true); echo "Start Memory : ".memory_get_usage()."\n"; $result = mysql_query('SELECT * FROM addr', $db); for ($i = 0; $i < 10; $i++) { $row = mysql_fetch_assoc($result); if ($row === false) break; unset($row); gc_collect_cycles(); echo " ".memory_get_usage()."\n"; } mysql_free_result($result); echo "End Memory : ".memory_get_usage()."\n"; ?> Expected result: ---------------- Memory usage should be similar after each execution Start Memory : 31108008 65407576 65407576 65407576 65407576 65407576 65407576 65407576 65407576 65407576 65407576 End Memory : 31108160 Actual result: -------------- Memory usage increases significantly after each execution Start Memory : 31108008 65407576 65408120 65408664 65409208 65409752 65410296 65410840 65411384 65411944 65412488 End Memory : 31108160 -- Edit bug report at https://bugs.php.net/bug.php?id=61060&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=61060&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=61060&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=61060&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=61060&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=61060&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=61060&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=61060&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=61060&r=needscript Try newer version: https://bugs.php.net/fix.php?id=61060&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=61060&r=support Expected behavior: https://bugs.php.net/fix.php?id=61060&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=61060&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=61060&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=61060&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=61060&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=61060&r=dst IIS Stability: https://bugs.php.net/fix.php?id=61060&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=61060&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=61060&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=61060&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=61060&r=mysqlcfg