Re: PHP Denial of service

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On Oct 14, 2006, at 4:05 AM, Ryan Barclay wrote:

It hasn't actually been attempted. However, if a couple of a users were to hold the refresh, the page generation times would go up ridiculously and clients would be waiting over 20sec for pages. As mentioned, it's a very heavy php-mysql script with lots of queries.

I see what you're talking about. Does everyone need live data for each page request? It seems like a great opportunity for data / page caching. I'm trying to remember the name of the caching tool I used, but I ran into something similar on one of my websites a few years ago. Each page was dynamic and the server load was high. I installed caching and pages would only update occasionally... meaning that users received pages from the cache, instead of each page getting processed with each request. You could also try a reverse proxy with apache to do something similar. The limit IP stuff from Roman also looks interesting.

-Ed

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