Caching Database Information

Hello all, I have some questions regarding caching information with PHP. I was thinking that I might cache all information that won't be changing for long periods of time...possibly only once a day or so, instead of querying the database for information every time. My question is: is there such as thing as too much caching? Can I cache too much and therefore negate the advantages of caching? Thanks, Paul _________________________________________________________________ Is your PC infected? Get a FREE online computer virus scan from McAfee® Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963