Server Too Busy Error

From time to time I am receiving server too busy errors

<httpRuntime
maxRequestLength="1536"
executionTimeout="60"
appRequestQueueLimit="700"
/
These are my settings in my web.config. Is there anyway to monitor the apprequestqueue live? It seems a little odd that its going over 700. I server about 1.3 million pages per day so it is possible. I thought it would be interesting to keep a closer eye on it.

Is there any downside to upping to to say 1500 for safety?

Thanks
mike123I'd suggest setting up Performance Monitor to log the Queue numbers over a period of time. See if the traffic is hitting the limit based on normal traffic, or if perhaps some event (or specific page) is causing a large jump in queued pages -- which would indicate a problem that needs to be trouble-shooted with the code.