"We really hate running around with our hair on fire, and eventually we have to upgrade our servers. This just happens to be the time when traffic is at *it's* lowest, so..."
The possessive form of "it" is "its" with no apostrophe. "It's" always means "it is."
Bugs
The possessive form of "it" is "its" with no apostrophe. "It's" always means "it is."