Bug #54329 [Opn->Csd]: MSSql extension memory leak

Edit report at https://bugs.php.net/bug.php?id=54329&edit=1 ID: 54329 Updated by: felipe@php.net Reported by: dotslashpok at gmail dot com Summary: MSSql extension memory leak -Status: Open +Status: Closed Type: Bug Package: MSSQL related Operating System: Red Hat,Windows 7 PHP Version: 5.3SVN-2011-03-21 (SVN) -Assigned To: +Assigned To: felipe Block user comment: N Private report: N New Comment: This bug has been fixed in SVN. Snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. Thank you for the report, and for helping us make PHP better. Thanks for the patch! Previous Comments: ------------------------------------------------------------------------ [2011-07-03 15:01:42] felipe@php.net Automatic comment from SVN on behalf of felipe Revision: http://svn.php.net/viewvc/?view=revision&amp;revision=312860 Log: - Fixed bug #54329 (MSSql extension memory leak) patch by: dotslashpok at gmail dot com ------------------------------------------------------------------------ [2011-03-21 03:24:18] dotslashpok at gmail dot com Description: ------------ Fetching data through dblib causes php memory usage to go up after each query. This occurs even after unsetting the retrieved data. This is because free_rows is not freeing the correct data. Test script: --------------- <?php $db = new PDO('...','...','...'); $stmt = $db->prepare('SELECT TOP 100 * FROM Users'); echo "Start Memory : ".memory_get_peak_usage()."\n"; for ($i = 0; $i < 10; $i++) { $stmt->execute(); $data = $stmt->fetchAll(); unset($data); gc_collect_cycles(); echo $i." : ".memory_get_peak_usage()."\n"; } echo "End Memory : ".memory_get_peak_usage()."\n"; Expected result: ---------------- Memory usage should be similar after each execution Start Memory : 630824 0 : 1257944 1 : 1258024 2 : 1258920 3 : 1258920 4 : 1258984 5 : 1259048 6 : 1259096 7 : 1259224 8 : 1259288 9 : 1259296 End Memory : 1259296 Actual result: -------------- Memory usage increases significantly after each execution Start Memory : 630824 0 : 1257944 1 : 1321216 2 : 1384528 3 : 1447688 4 : 1510920 5 : 1574192 6 : 1637464 7 : 1700736 8 : 1763960 9 : 1827208 End Memory : 1827208 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=54329&edit=1