web-proxy maxxing running high usage

Today I noticed my cpu on mikrotik RB493G running at about 100%. I went into the profile and noticed the web-proxy running at around 40%. Currently I have about 100 people logged in and 500 in the host list. This is not out of the ordinary for this location but this is the first time I have seen my cpu max out. Also the mikrotik is acting as a hotspot doing authentication.

Thanks,
Elec

Just in case anyone was wondering we had to upgrade to rb 1100ahx2 in order to have enough memory.