Server Load Fun

**FredFredrickson** · September 6th, 2007, 7:27 PM

So I decided to make my own server load image, and I started to wonder, why do we use this arbitrary number? According to the script Kayla released, the number is out of 20. Why do we use this numer that's otherwise arbitrary instead of using a percentage? Percentages are eaiser to use I'd say.

But then I noticed something. Math is wrong in the code released by Kayla. It assumes that the maximum server load could be 20, but then it generates the graph out of 28. Even worse, if the scale was 28, it's limited to 20, so the graph can never be more than 71% full.

So basically everybody's server load button is wrong.

Oh and also if it is out of 20, my button is correct - and better, it uses a percentage. YAY. Anybody want in?

PHP Code:


			
<?php 

/* name:        severload.php 

   Author:      Jesse Chilcott 

   Description: This script creates a horizontal meter that shows the server load 

   Useage:      link to the script as if it is an image 

   

   Renovated:   Fred Fredrickson

   Website:     www.Fredrickville.com

   Changes:     Fixed percentages.

*/ 





/* get and set more image and font details */ 

$servername = "SH105";

$maximumserverload = 20; //this is the upper limit of the range of server load values... adjust to your server 

$im = imagecreatetruecolor(91,24); 



$width = imagesx($im); 

$height = imagesy($im); 

$textcolor = imagecolorallocate($im, 2,61,88);

$textcolor2 = imagecolorallocate($im, 255,255,255); 

$fillcolor1 = imagecolorallocate($im, 195,202,214); 

$fillcolor2 = imagecolorallocate($im, 2,61,88); 

$metercolor = imagecolorallocate($im, 75,115,136); 

$bordercolor = imagecolorallocate($im, 0,0,0);

$bordercolor2 = imagecolorallocate($im, 255,255,255); 

$textWidth = imagefontwidth($font) * strlen( $str ); 

$textHeight = imagefontheight($font); 



/* get server load */ 

        if (file_exists("/proc/loadavg") == true) 

        { 

            $fp = @fopen("/proc/loadavg", "r"); 

            if (empty($fp) == false) 

            { 

                $loadavg = explode(" ", fread($fp, 6)); 

                fclose($fp); 

                $loadav = substr($loadavg[0], 0, 4);  // we don't want to many digits or it will overlap the meter 



            } 

            else 

            { 

                $loadav   = "error"; 

            } 

        } 

        else 

        { 

            $loadav   = "error"; 

        } 

header("Content-type: image/gif"); 

$xLoc = 26; 

$yLoc = 0; 

$loadperc = round(($loadav / $maximumserverload) * 100, 2);

if(!strpos($loadperc, "."))

{

$loadperc = $loadperc . ".00";

}

if(substr($loadperc, strlen($loadperc) - 2, 1) == ".")

{

$loadperc = $loadperc . "0";

}

if(round(($loadav / $maximumserverload) * 100, 2) == 100)

{

$loadperc = "100";

}

/* over lap background image from the right with a white rectangle */ 

imagefilledrectangle ( $im, 0 ,0, $width, $height, $fillcolor1 ); 

imagefilledrectangle ( $im, 0 ,0, $width, 10, $fillcolor2 ); 

imagerectangle ( $im, 0,0, $width -1, $height-1, $bordercolor ); 



imagestring($im, 1, 3, 1, "SERVER LOAD:" . $servername, $textcolor2); 

imagestring($im,2, 3, 10, $loadperc . "%", $textcolor); 

$src = ImageCreateFromJPEG("/home/fredric/public_html/arrow.jpg"); 



/* do meter bar */ 

if ($loadav != "error") { 

    $limit = $width - (4);   

    $percent = round(($loadav / $maximumserverload) * 100, 2); 

    $meterwidth = ((($percent / 100) * (($width - 4) - 40)) + 40);



    if ($meterwidth > $limit) 

        $meterwidth = $limit; 



    imagefilledrectangle ( $im, 40, 14, $meterwidth, $height-5, $metercolor ); 

    imagerectangle ( $im, 40, 14, $width - (4), $height-(5), $metercolor ); 

} 

/* output gif image to browser */ 

imageGIF($im); 

imagedestroy($im); 

?>

**Bigjohn** · September 6th, 2007, 7:39 PM

How are you determining the percentage and it's accuracy?

**puckchaser** · September 6th, 2007, 7:44 PM

Here goes...

He assumes,

$maximumserverload = 20

and

Then he gets the avg server load

$fp =

fopen("/proc/loadavg", "r");

Then divides average over max

$loadperc = round(($loadav / $maximumserverload) * 100, 2);

He's got some fancy other code in there, but thats the gist of it.

I assume accuracy would depend on
(1) do you believe 20 is the max
(2) do you believe /proc/loadavg

**FredFredrickson** · September 6th, 2007, 7:45 PM

According to the script, the max server load is 20, so we have a scale. However, the script used two different scales. but tried to show them on the same graph. Not sure which was right, if either. I'm assuming that the server load has a max.. ??

**removed** · September 6th, 2007, 7:59 PM

Quote:

Originally Posted by FredFredrickson

Not sure which was right, if either. I'm assuming that the server load has a max.. ??

Nope, it sure doesn't, though your server load image should be interesting if the server's load spikes to 300 from someone sending spam...

**FredFredrickson** · September 6th, 2007, 8:01 PM

hot damn! How is it calculated then? what a useless number

**caseylee** · September 6th, 2007, 8:04 PM

My serverload button is prettier

**removed** · September 6th, 2007, 8:05 PM

It has a Domo Kun in it! I'm sorry FredFredrickson, but caseylee wins...

**FredFredrickson** · September 6th, 2007, 8:05 PM

Ok, but seriously now, what's the point to the graph when you have an arbitrary number with no scale?

September 6th, 2007, 7:27 PM	#1 (permalink)
FredFredrickson Senior Member Super #1 Joined in Nov 2003 Lives in New Hampshire 1,254 posts Gave thanks: 3 Thanked 27 times	Server Load Fun So I decided to make my own server load image, and I started to wonder, why do we use this arbitrary number? According to the script Kayla released, the number is out of 20. Why do we use this numer that's otherwise arbitrary instead of using a percentage? Percentages are eaiser to use I'd say. But then I noticed something. Math is wrong in the code released by Kayla. It assumes that the maximum server load could be 20, but then it generates the graph out of 28. Even worse, if the scale was 28, it's limited to 20, so the graph can never be more than 71% full. So basically everybody's server load button is wrong. Oh and also if it is out of 20, my button is correct - and better, it uses a percentage. YAY. Anybody want in? PHP Code: <?php /* name: severload.php Author: Jesse Chilcott Description: This script creates a horizontal meter that shows the server load Useage: link to the script as if it is an image Renovated: Fred Fredrickson Website: www.Fredrickville.com Changes: Fixed percentages. / / get and set more image and font details / $servername = "SH105"; $maximumserverload = 20; //this is the upper limit of the range of server load values... adjust to your server $im = imagecreatetruecolor(91,24); $width = imagesx($im); $height = imagesy($im); $textcolor = imagecolorallocate($im, 2,61,88); $textcolor2 = imagecolorallocate($im, 255,255,255); $fillcolor1 = imagecolorallocate($im, 195,202,214); $fillcolor2 = imagecolorallocate($im, 2,61,88); $metercolor = imagecolorallocate($im, 75,115,136); $bordercolor = imagecolorallocate($im, 0,0,0); $bordercolor2 = imagecolorallocate($im, 255,255,255); $textWidth = imagefontwidth($font) strlen( $str ); $textHeight = imagefontheight($font); /* get server load / if (file_exists("/proc/loadavg") == true) { $fp = @fopen("/proc/loadavg", "r"); if (empty($fp) == false) { $loadavg = explode(" ", fread($fp, 6)); fclose($fp); $loadav = substr($loadavg[0], 0, 4); // we don't want to many digits or it will overlap the meter } else { $loadav = "error"; } } else { $loadav = "error"; } header("Content-type: image/gif"); $xLoc = 26; $yLoc = 0; $loadperc = round(($loadav / $maximumserverload) 100, 2); if(!strpos($loadperc, ".")) { $loadperc = $loadperc . ".00"; } if(substr($loadperc, strlen($loadperc) - 2, 1) == ".") { $loadperc = $loadperc . "0"; } if(round(($loadav / $maximumserverload) * 100, 2) == 100) { $loadperc = "100"; } /* over lap background image from the right with a white rectangle / imagefilledrectangle ( $im, 0 ,0, $width, $height, $fillcolor1 ); imagefilledrectangle ( $im, 0 ,0, $width, 10, $fillcolor2 ); imagerectangle ( $im, 0,0, $width -1, $height-1, $bordercolor ); imagestring($im, 1, 3, 1, "SERVER LOAD:" . $servername, $textcolor2); imagestring($im,2, 3, 10, $loadperc . "%", $textcolor); $src = ImageCreateFromJPEG("/home/fredric/public_html/arrow.jpg"); / do meter bar / if ($loadav != "error") { $limit = $width - (4); $percent = round(($loadav / $maximumserverload) 100, 2); $meterwidth = ((($percent / 100) * (($width - 4) - 40)) + 40); if ($meterwidth > $limit) $meterwidth = $limit; imagefilledrectangle ( $im, 40, 14, $meterwidth, $height-5, $metercolor ); imagerectangle ( $im, 40, 14, $width - (4), $height-(5), $metercolor ); } /* output gif image to browser / imageGIF($im); imagedestroy($im); ?> __________________ Surmunity Special-Free Photos To Season Your Site/Blog, Code: fallatsurpass Last edited by FredFredrickson; September 6th, 2007 at 7:33 PM.. Reason: I'm good at math*

September 6th, 2007, 7:39 PM	#2 (permalink)
Bigjohn minor deity Super #1 Joined in Apr 2004 Lives in Georgia Hosted on XEON 7,387 posts Gave thanks: 28 Thanked 94 times	How are you determining the percentage and it's accuracy? __________________ Proud to be a Surmunity Mod! XEON PASS60 PASS61 Make a fundamental difference! My Sites: Curious about Brewing Beer? Join the community! >>>>> Some Change is GOOD! Keep your paycheck! Support the Fair Tax Get into an Art museum Victorian London It's your brain -*ON WEB* - mybrainhost.com (under development) What SHOULD Government do? Much Less than it Does!

September 6th, 2007, 7:44 PM	#3 (permalink)
puckchaser He shoots.. He scores! Super #1 Joined in Feb 2007 Lives in A room with no windows. Hosted on SH110 1,448 posts Gave thanks: 46 Thanked 140 times	Here goes... He assumes, $maximumserverload = 20 and Then he gets the avg server load $fp = fopen("/proc/loadavg", "r"); Then divides average over max $loadperc = round(($loadav / $maximumserverload) * 100, 2); He's got some fancy other code in there, but thats the gist of it. I assume accuracy would depend on (1) do you believe 20 is the max (2) do you believe /proc/loadavg __________________ SH110

September 6th, 2007, 7:45 PM	#4 (permalink)
FredFredrickson Senior Member Super #1 Joined in Nov 2003 Lives in New Hampshire 1,254 posts Gave thanks: 3 Thanked 27 times	According to the script, the max server load is 20, so we have a scale. However, the script used two different scales. but tried to show them on the same graph. Not sure which was right, if either. I'm assuming that the server load has a max.. ?? __________________ Surmunity Special-Free Photos To Season Your Site/Blog, Code: fallatsurpass

September 6th, 2007, 8:01 PM	#6 (permalink)
FredFredrickson Senior Member Super #1 Joined in Nov 2003 Lives in New Hampshire 1,254 posts Gave thanks: 3 Thanked 27 times	hot damn! How is it calculated then? what a useless number __________________ Surmunity Special-Free Photos To Season Your Site/Blog, Code: fallatsurpass

September 6th, 2007, 8:04 PM	#7 (permalink)
caseylee 4-8-15-16-23-42 Excelling Contributor Joined in Jul 2007 Lives in Australia, turn left at America Hosted on Luna & Nexus (dedicated) 779 posts Gave thanks: 37 Thanked 29 times	My serverload button is prettier __________________ www.casey-lee.com

September 6th, 2007, 8:05 PM	#8 (permalink)
removed Surpass Abuse Admin Super #1 Joined in Mar 2005 Lives in Houston, TX Hosted on NONE 7,797 posts Gave thanks: 11 Thanked 278 times	It has a Domo Kun in it! I'm sorry FredFredrickson, but caseylee wins... __________________ Unofficial IRC Channel: #surpass EFNet Unofficial = No official support. Support requests can be submitted to our helpdesk.

September 6th, 2007, 8:05 PM	#9 (permalink)
FredFredrickson Senior Member Super #1 Joined in Nov 2003 Lives in New Hampshire 1,254 posts Gave thanks: 3 Thanked 27 times	Ok, but seriously now, what's the point to the graph when you have an arbitrary number with no scale? __________________ Surmunity Special-Free Photos To Season Your Site/Blog, Code: fallatsurpass

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Rate This Thread
Rate This Thread: