Description:
------------
mysql_pconnect  create too many connections ,
not using the same connection in x86_64
(web server and mysql server not in the same computer)

I have test in 32bit system is okay,
both using the same mysql5.0.22
 

Reproduce code:
---------------
<?php
function getmicrotime(){
    list($usec, $sec) = explode(" ",microtime());
    return ((float)$usec + (float)$sec);
}
flush();
$t1=getmicrotime();//start time

$db=mysql_pconnect("61.145.112.136", "test", "test");   
 if($db) echo $i.'connect successfully<br/>';
  echo mysql_stat($db).'<br/>';

$t2=getmicrotime();
$tt=$t2-$t1;
$sql="SHOW PROCESSLIST ";
$res=mysql_query($sql);
if($res){
        $dbstatus=mysql_num_rows($res);
}else $dbstatus=mysql_error();
//mysql_close($db);

echo "there are ".$dbstatus." connections ";
echo "time for connect is $tt ***";

?>