How can I detect and survive being “Slashdotted”?

Question

What\'s a good way to survive abnormally high traffic spikes?

My thought is that at some trigger, my website should temporarily switch into a \"low bandwidth\" mode: swi

Answer 1

There's simply no way to know whether or not your website will survive heavy loads unless you stress test it. Use something like siege and see where your performance problems lie. Does it grow in memory too quickly? Does it start slowing down with a bunch of concurrent connections? Does it start taking forever to access the database?

Once you know where the performance problems lie, then it becomes a matter of getting rid of them. Unfortunately, it's difficult to go into much more detail than that without knowing more about your particular situation, but keep in mind that you ARE talking about optimizations here. Thus, you should only act when you KNOW there are performance problems.

And I would argue that you're not necessarily just preparing for a once in a lifetime event. DOS attacks still happen, so it's good to have preparations in place even if your site doesn't get slashdotted.

The only thing that I can think of off the top of my head that will help you in almost all situations is if you gzip your content. That will save a lot of bandwidth and all modern browsers will support it without too much of a performance problem.