Log analyzer for BIG webserverlogs and windows?

[Due]

Who can recommend a good and FAST log analyzer for windows? (Log files are from FreeBSD server running Apache)
It must be FAST and not bug down the computer too much. The log files are aprox 1 GB

[sandman]

If you find a good one please tell me also http://bbs.adultwebmasterinfo.com/ubb/smile.gif