pt-heartbeat database connections

Does pt-heartbeat (in either --update or --monitor mode) hold a single, long-lived connection to the database, or does it connect and then drop the connection at each check interval? Thanks.

Hi, you can use interval option to control when you want to check /update. Please see more details here.
http://www.percona.com/doc/percona-toolkit/2.1/pt-heartbeat.html#cmdoption-pt-heartbeat–interval