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It sounds like you need to find out whats going on with your mysql.. there are a number of things that can be happening, but you need to isolate what is actually causing this. If your code ran fine before, and the increase in traffic is killing something then the code you have should be fine, however.... when you say getting hit hard with traffic, do you know how much bandwidth your using(Not is amount, but throughput).. do you have anything monitoring your server? graphs, etc
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