Stats with 1 minute resolution

The cache manager exposes many statistics with a 5 minute and 60
minute horizon, but operationally it's sometimes useful to have more
fine-grained stats without analysing the logs.

How do people feel about adding 1-minute stats; e.g., where
appropriate in mgr:info, and maybe in a mgr:1min?

 From a quick look at the code, it doesn't seem like a lot of work;
the only concern that's immediately apparent to me is that modifying
mgr:info may break some scripts that scrape it.

Cheers,

--
Mark Nottingham       mnot_at_yahoo-inc.com