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Bug #48051 mysql_connect slow
Submitted: 2009-04-22 15:39 UTC Modified: 2009-04-22 16:16 UTC
From: bouddhagod at hotmail dot com Assigned:
Status: Not a bug Package: Performance problem
PHP Version: 5.2.9 OS: Gentoo
Private report: No CVE-ID: None
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From: bouddhagod at hotmail dot com
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 [2009-04-22 15:39 UTC] bouddhagod at hotmail dot com
Description:
------------
I made a connection to a mysql server. The first time i load the page all look fine. It take about 3500 - 400 ms to do the jog. The second time I load the page ( it's a login screen ) the same mysql_connect take about 5-6 sec. Thoses 2 servers is located on the same computer ( dual xeon 2.4 with 1.5 gig of ram ). So I'm sure it's not a hardware problem.

Any suggestion ?

Reproduce code:
---------------
mysql_connect( "192.168.1.100", "username", "password");

Expected result:
----------------
not 5 SEC to responde...

Actual result:
--------------
first loading : 300 ms
second loading : 5 SEC
third loading : 300ms
fourth loading : 5 SEC
Etc ...

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 [2009-04-22 15:47 UTC] bouddhagod at hotmail dot com
function microtime_float()
{
    list($usec, $sec) = explode(" ", microtime());
    return ((float)$usec + (float)$sec);
}
$time_start = microtime_float();

$tutu = mysql_connect("192.168.1.100" , "user" , "password");

mysql_close($tutu);

$time_end = microtime_float();
$time = $time_end - $time_start;
    
echo "Did nothing in $time seconds\n";
 [2009-04-22 16:09 UTC] bouddhagod at hotmail dot com
If I put localhost all work fine.
 [2009-04-22 16:16 UTC] scottmac@php.net
This is probably firewall related or dns related. Nothing to do with PHP here.
 
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