Comments on: Cacti: Using Cacti to monitor web page loading – Part 3

By: dan

dan — Tue, 22 Jun 2010 08:35:50 +0000

can anybody say, how long is running pageload-agent.php if a web sute is not available?

By: pajarofeo

pajarofeo — Wed, 10 Mar 2010 16:15:13 +0000

I think that the error is:

the script doesn´t save datas to the file con_114.rrd because the date isn’t update

debian:/usr/share/cacti/site/pageload# ls -l /var/lib/cacti/rra/con_263.rrd
-rw-r–r– 1 www-data www-data 56224 mar 10 13:10 /var/lib/cacti/rra/con_263.rrd
debian:/usr/share/cacti/site/pageload# date
wend mar 10 17:04:22 CET 2010
cactimap:/usr/share/cacti/site/pageload#

By: pajarofeo

pajarofeo — Wed, 10 Mar 2010 15:28:22 +0000

I’m getting the same problem (ERROR: No DS called ‘ttl’ in ‘/var/www/html/cacti/rra/con_114.rrd’)

My PHP has curl enabled.

Running the php script from the command line work fine.

By: webmaster

webmaster — Fri, 08 Jan 2010 02:43:53 +0000

hi Anil

Unfortunately I have stopped running this service so I can’t offer much help, as I’ve found a better alternative for measure page load time that’s more reflective of how pages load.

http://www.askaboutphp.com/71/webpagetest-tool-the-little-known-but-great-webpage-benchmarking-tool.html

By: Anil Perera

Anil Perera — Thu, 07 Jan 2010 17:44:33 +0000

Hi,
I do not know whether you are still maintaining this site, but when I run your script from the command line, I get he result. However in Cacti, I do not get a graph and cacti.log shows the following message:-

01/06/2010 12:51:23 PM – SPINE: Poller[0] Host[1] ERROR: Empty result [127.0.0.1
]: ‘php /usr/opt/apache/htdocs/cacti/scripts/pageload-agent.php http://www.askaboutphp.
com’
01/06/2010 12:51:23 PM – SPINE: Poller[0] Host[1] DS[33119] SCRIPT: php /usr/opt
/apache/htdocs/cacti/scripts/pageload-agent.php http://www.askaboutphp.com, output: U
01/06/2010 12:51:23 PM – SPINE: Poller[0] Host[1] DEBUG: The NIFTY POPEN returne
d the following File Descriptor 6

By: joeyd

joeyd — Thu, 26 Nov 2009 05:34:48 +0000

Great script!! and does return values from the command line but it prints out a blank line then the results. Could this be the reason it’s not storing in the RRD?

Also when I look at the logs I see the script attempt to run but the “output” is just ‘U’..wierd

11/26/2009 12:14:12 AM – SPINE: Poller[0] Host[0] DS[221] SCRIPT: /usr/bin/php -q /var/www/html/scripts/pageload-agent.php http://www.naturalstandard.com, output: U

Any thoughts?

By: jafo

jafo — Thu, 19 Nov 2009 23:42:13 +0000

Very nice walkthrough. Part 4 could be named “Troubleshooting tips” Good work!

By: yugi

yugi — Tue, 29 Sep 2009 18:36:38 +0000

Hi,

I tried to add a threshold to the graph, but for some reason it’s not triggered, though I used a low value which is lower than a current one. What could be a problem?

By: Ben Lye

Ben Lye — Thu, 24 Sep 2009 08:58:54 +0000

I think I've fixed the problem where only the dns parameter is returned. I don't know if it's the same fix as Anderson, but it's working for me. Change these lines in pageload-agent.php: print "dns:".$output['namelookup_time']; print " con:".$output['connect_time']; print " pre:".$output['pretransfer_time']; print " str:".$output['starttransfer_time']; print " ttl:".$output['total_time']; print " sze:".$output['size_download']; print " spd:".$output['speed_download']; To this (beware any line wrapping, it should only be two lines): $outstring = "ttl:".$output['total_time']." str:".$output['starttransfer_time']." dns:".$output['namelookup_time']." con:".$output['connect_time']." pre:".$output['pretransfer_time']." sze:".$output['size_download']." spd:".$output['speed_download']; print chop($outstring,"\n\r"); Ben.

By: Tom Kirkpatrick

Tom Kirkpatrick — Sun, 13 Sep 2009 00:05:37 +0000

The only graph item that I can add to my graph without getting that error is th ‘con’ item. With just that item added, I do get a graph, but it has no data. Adding any more graph items results in the above error.