rails site maintenance

i might be wrong, but it seems that ROR requires a bit of constant
work and monitoring once the site is live - even a low traffic site -
compared with a php site that once up, i almost never have to look at.

would any care to advise on the difinitive list of what housekeeping
needs to be done suggest ways of automating these processes, eg.
clearing out logs, caches, sessions, etc.