#48528 [NEW]: mysqlnd causes PDO/MySQLi to leak memory

From: bugs dot php dot net at moesen dot nu Operating system: Linux 2.6 PHP version: 5.3CVS-2009-06-11 (snap) PHP Bug Type: MySQL related Bug description: mysqlnd causes PDO/MySQLi to leak memory Description: ------------ PHP 5.3 leaks memory when using the MySQL functions, both through PDO and MySQLi directly. When recompiled without mysqlnd, the same code works fine. ./configure --with-mysql=shared,mysqlnd --with-mysqli=shared,mysqlnd --with-pdo-mysql=shared,mysqlnd [ . . . ] Recompiled today's snapshot without the ',mysqlnd'. Reproduce code: --------------- PDO: $db = new PDO($dsn, $user, $pass); $stmt = $test->prepare('SELECT * FROM tech_eciffOkcab.crawlPriceComp'); $result = $stmt->execute(); while($result && $row = $stmt->fetch(PDO::FETCH_ASSOC)) { echo memory_get_usage(), "\n"; } MySQLi: $db = new MySQLi($host, $user, $pass); $result = $db->query('SELECT * FROM tech_eciffOkcab.crawlPriceComp'); while ($result && $row = $result->fetch_assoc()) { echo memory_get_usage(), "\n"; } Expected result: ---------------- Consistent memory_get_usage(); I.e., no extra memory required, and thus no out-of-memory errors. Actual result: -------------- Linearly increasing memory_get_usage(); PDO: 23168400 23169064 ... 33552804 33552916 -> OOM and segfault. MySQLi: 23168216 23168700 ... 33552812 33552924 -> OOM and segfault. -- Edit bug report at http://bugs.php.net/?id=48528&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=48528&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=48528&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=48528&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=48528&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=48528&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=48528&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=48528&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=48528&r=needscript Try newer version: http://bugs.php.net/fix.php?id=48528&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=48528&r=support Expected behavior: http://bugs.php.net/fix.php?id=48528&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=48528&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=48528&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=48528&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=48528&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=48528&r=dst IIS Stability: http://bugs.php.net/fix.php?id=48528&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=48528&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=48528&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=48528&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=48528&r=mysqlcfg