[olug] PHP and Linux

[Michael Peterson Wireless]

Sar and vmstat said things were fine and mostly idle before the system
stopped responding each time. 

-----Original Message-----
From: olug-bounces at olug.org [mailto:olug-bounces at olug.org] On Behalf Of
Terry
Sent: Monday, September 06, 2004 12:53 PM
To: Omaha Linux User Group
Subject: Re: [olug] PHP and Linux

Very basic response but what do the sar tools tell you about system
resources at minute intervals?


On Mon, 6 Sep 2004 08:07:55 -0500, Michael Peterson Wireless
<mikejack at stratomail.com> wrote:
> 
> PHP and Linux
> 
> Has anyone other than myself came across issues with running PHP 
> scripts for so long that they lock up the Linux kernel and only a 
> system reset will get access to the system back?
> 
> The first time it happened I was trying to destroy objects that were 
> not created.
> But the script ran for hours before the system become no longer
accessible.
> Ping still worked but no access services (HTTP, SSH, Telnet) worked to 
> get to the box.
> This system is running RHEL ES 3 Update 2.
> 
> The second time was this weekend when I was running a script for 5-10
hours.
> I was reading a MySQL database and creating a URL and then creating an 
> image and saving it to disk.
> After running and creating over 32000 image files the entire system 
> was no longer accessible.
> I changed the PHP script so it would be launched from an infinite loop 
> shell script and only run for a short time and save a mark point to a 
> text file and then the shell slept for 30 seconds and then restarted 
> the PHP script reading in the mark point and running from that point 
> to the next mark point. I let it only create about 2000 - 2500 images 
> between mark points and then stop. It continued until all images were 
> created and I manually stopped the shell script.
> This system is running Centos 3.1 ( free recompiled from source clone 
> to RHEL ES 3 Update 1 ).
> 
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