note 13214 deleted from ref.session by nlopess

Note Submitter: j.mccoy@cc.utexas.edu ---- If your using PHP session handling with PostgreSQL as session storage, a efficient method of handling garbage collection would be a rule: create rule rle_sessions_gc as on insert into sessions where (random() >= 0.7) do delete from sessions where expiry <= current_timestamp; this rule assumes that the sessions table has an expiry field into which is placed the timestamp at which the session should expire; change the value random is checked against to change the probability of garbage collection.