http://www.toosweettobesour.com/2008/05/21/amp-and-runaway-scripts/ Far Too Sweet To Be Sour Thu, 04 Dec 2008 01:06:08 +0000 http://wordpress.org/?v=2.6.5 http://www.toosweettobesour.com/2008/05/21/amp-and-runaway-scripts/#comment-36 SamuraiNet Blog » Blog Archive » Reading Rainbow: Episode 7 Sun, 25 May 2008 20:33:27 +0000 http://www.toosweettobesour.com/?p=53#comment-36 [...] I read this post on a friend of mine’s blog and thought it was rather useful. I’ve had PHP scripts running on cron before that had exactly this problem. They would lock up after a while and before I knew it, I had about 15 “undead” PHP processes just eating up my CPU. What was worse was that my shared host only allowed each user 15 processes at the same time, so slowly but surely the rest of my sites would go down. http://www.toosweettobesour.com/2008/05/21/amp-and-runaway-scripts/ [...] [...] I read this post on a friend of mine’s blog and thought it was rather useful. I’ve had PHP scripts running on cron before that had exactly this problem. They would lock up after a while and before I knew it, I had about 15 “undead” PHP processes just eating up my CPU. What was worse was that my shared host only allowed each user 15 processes at the same time, so slowly but surely the rest of my sites would go down. http://www.toosweettobesour.com/2008/05/21/amp-and-runaway-scripts/ [...]

]]> http://www.toosweettobesour.com/2008/05/21/amp-and-runaway-scripts/#comment-31 only_samurai Fri, 23 May 2008 02:53:07 +0000 http://www.toosweettobesour.com/?p=53#comment-31 This is useful for more than just process control. A poorly written script could be exploited in a Denial of Service attack. In an open source project, where an attacker could analyze code for just such a scenario, this would be a great redundant feature. Even if, as some of the comments suggest, Apache or PHP takes care of run away threads, redundancy is a key tool in any developer's arsenal against malicious individuals. This is useful for more than just process control. A poorly written script could be exploited in a Denial of Service attack. In an open source project, where an attacker could analyze code for just such a scenario, this would be a great redundant feature. Even if, as some of the comments suggest, Apache or PHP takes care of run away threads, redundancy is a key tool in any developer’s arsenal against malicious individuals.

]]>