PHP Challenge: Break And Resume

[monkeypaw201]

I need to basically run a PHP Cron, i need it to limit it to 500 records at a time, fine and dandy i know how to do that.. now how can i have on a different Cron/Page, the script start from 501 and go for another 500  :o

 

Thanks

 

[rhodesa]

Out of curiosity, why are you limiting it to 500?

[monkeypaw201]

Out of curiosity, why are you limiting it to 500?

 

Because the scripts are large, and i dont want to overload the server

[rhodesa]

if you want to pace the script, use something like sleep() or usleep()

http://us2.php.net/manual/en/function.sleep.php

 

<?php
  $n = 0;
  while(...){
    //do some stuff
    $n++;
    if(!($n % 100))
      sleep(10); //Take a 10 second break every 100 records
  }
?>

or

<?php
  while(...){
    //do some stuff
    usleep(100); //Take a short break
  }
?>

[DarkerAngel]

if you want to pace the script, use something like sleep() or usleep()

http://us2.php.net/manual/en/function.sleep.php

 

<?php
  $n = 0;
  while(...){
    //do some stuff
    $n++;
    if(!($n % 100))
      sleep(10); //Take a 10 second break every 100 records
  }
?>

or

<?php
  while(...){
    //do some stuff
    usleep(100); //Take a short break
  }
?>

Couldn't this possibly trigger max_execution_time

 

Thought about it his script might do that anyways.

[monkeypaw201]

Couldn't this possibly trigger max_execution_time

 

Thought about it his script might do that anyways.

 

Right, this is to supposed to avoid server overload and the max_execution_time

 

[rhodesa]

You said this was going to be a cronjob, which is using PHP via the command line interface. When run from CLI max_execution_time is set to unlimited. As for 'server overload', the script will take up an unnoticeable amount of resources while it's sleeping.

 

Edit: To clarify, the amount of time it takes a script to complete is not related to the amount of load on the server.

[trq]

Just to add to rhodesa's comments, depending on what exactly your scripts do you may not even need php at all.

 

What do you want these cronjobs to do?

[monkeypaw201]

they need to update some databases with new information gotten from external websites

[synstealth]

try looking into AJAX..

[rhodesa]

try looking into AJAX..

 

While AJAX is great, it has nothing to do with the current topic.