From: suhachov at gmail dot com
Operating system: Linux FC
PHP version: 5.1.6
PHP Bug Type: Performance problem
Bug description: PDO eats 1 megabyte for every prepared statement for LONGTEXT
fields
Description:
------------
Simple program:
// remember used memory
$start = memory_get_usage();
$dbh = new PDO('mysql:...','...','...');
// create empty table
$dbh->query('DROP TABLE IF EXISTS ttt;');
$dbh->query("CREATE TABLE ttt ( id integer, args longtext);");
// simple code
function doQuery($id)
{
static $sth;
if( !$sth )
$sth = $GLOBALS['dbh']->prepare("SELECT * FROM ttt WHERE id =
?");
$sth->execute(array($id));
return $sth->fetchAll();
}
var_dump(doQuery('5'));
echo memory_get_usage()-$start;
// eats 1 megabyte of memory.
// if I duplicate doQuery()->doQuery2()
// and call doQuery2() - it eats 2(!!) Mb of memory
// if I remove LONGTEXT, everything is OK.
Reproduce code:
---------------
see above.
Expected result:
----------------
Please, not so much memory!
--
Edit bug report at http://bugs.php.net/?id=39308&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=39308&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=39308&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=39308&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=39308&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=39308&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=39308&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=39308&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=39308&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=39308&r=support
Expected behavior: http://bugs.php.net/fix.php?id=39308&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=39308&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=39308&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=39308&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=39308&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=39308&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=39308&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=39308&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=39308&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=39308&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=39308&r=mysqlcfg
