Bug #77495 [NEW]: STMT execute memory leak
From: istvan at dupai dot hu
Operating system: Windows
PHP version: 7.3.1
Package: MySQLi related
Bug Type: Bug
Bug description:STMT execute memory leak
Description:
------------
MySQLi prepared statement execution in a loop increases memory
consumption rapidly constantly.
Test script:
---------------
$now = microtime(true);
$db = new \Mysqli("localhost", "root", "password",
"database", 3306);
$stmt = $db->prepare("SELECT * FROM someTable WHERE id=?");
$stmt->bind_param("i", $id);
for( $id=1; $id<1000; $id++ ) {
$stmt->execute();
$result = $stmt->get_result();
$stmt->free_result();
}
echo "Time taken: ".(microtime(true)-$now)." seconds\n";
echo "Peak memory usage: ".number_format(memory_get_peak_usage())."
bytes\n";
Expected result:
----------------
Memory usage should peak and stay around 400 KBs.
Actual result:
--------------
Memory usage constantly grows.
--
Edit bug report at https://bugs.php.net/bug.php?id=77495&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77495&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77495&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77495&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=77495&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=77495&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=77495&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=77495&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=77495&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=77495&r=support
Expected behavior: https://bugs.php.net/fix.php?id=77495&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=77495&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=77495&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=77495&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77495&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=77495&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=77495&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=77495&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=77495&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=77495&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=77495&r=mysqlcfg
Thread (4 messages)
- istvan at dupai dot hu