Software for analyzing apache error logs?

The more I get to work on my business and less in my business, the more I get to think about the kind of reports I currently have at my fingertips, how they might be improved, and what new ones I would like to see.

It just occurred to me that error logs/report exist for all the websites that we host (about 100), but it's rare that we ever actually review them except for the odd occassion when we're trying to track down a specific error. The main reason we don't refer to them on a routine basis is that it's not easy to separate the useful stuff (eg. broken internal links) from the useless stuff (ie. things we can do less to fix or care less about such as incomplete page requests or broken/old links from external site).

So my question: does anyone know of any useful techniques or scripts that look specifically at the error log files and separates out the 'stuff we should care about and/or we can fix' from the 'stuff we don't have to care about'?

Thanks for your comments.

 

Thanks squirrel,

I think the task is (at least) a two stage process:

1. Group the error log entries by hosting account
2. Rank the errors from most significant/important to least important.

my 2c.