Main problem is that query is done in a database of more than 2Go and it
will be difficult to mail it. ;=)
I try with several versions of mysql and php from mysql 4.1.18 to last 5.x
and php 4.4.0 to 5.x and don't find significant change in performance.
If it can help here is the loop.
for($debut=$deb;$debut < $fin;$debut += $range){
$end = $debut + $range;
$query = "select avg(total) from `histo_perfs_x` where id1 =
'".$id1."' and id2 = '".addslashes($id2)."' and date > '".$debut."' and date
< '".$end."'";
$result = mysql_query($query) or die("La requete :$query a echouee.");
if(!$result)$databar_total[$j][$i]= 0;
else {
$ligne = mysql_fetch_array($result);
if($ligne[0] != "")$databar_total[$j][$i]=$ligne[0]; else
$databar_total[$j][$i]= "-";
}
}
----- Original Message -----
From: "Mark Kirkwood" <[EMAIL PROTECTED]>
To: "Eric" <[EMAIL PROTECTED]>
Cc: "Lucas Holt" <[EMAIL PROTECTED]>; <[email protected]>
Sent: Wednesday, April 05, 2006 2:32 AM
Subject: Re: Low perf with smp
Eric wrote:
I know Pete but I downgrad because when installing 6.0 performance was
half than with 4.11.
I done tests and tests but still have very low perfs. I then downdgrad to
4.11 to see if it came from hardware or software.
Conclusion is that my test wich is consist of loop of mysql query done by
a php script take :
- 32 sec with 4.11 without SMP
- 54 sec with 4.11 with SMP
- 62 sec with 6.0 or 6.1 beta 4
That's why actually I'm with 4.11.
If you have any idea how improve perfs with 6.0 it will be a pleasure.
Hardware is new dell 1850 with bi-xeon dualcore 2.8Ghz and scsi 15.000t
HDD on raid1 perc4si 256Mo controller.
If you could post, or link to your mysql query and php script, then I (or
in fact anyone) could try to reproduce this (I've got two almost identical
machines running 6.0, so could downgrade one to 4.x.).
In addition, what versions of php and mysql are you using?
Cheers
Mark
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