The logfacility is used to tell Heartbeat which syslog logging facility it should use for logging its messages.
The possible values for logfacility vary by operating system, but some of the most common ones are {auth, authpriv, daemon, syslog, user, local0, local1, local2, local3, local4, local5, local6, local7}.
A sample logfacility directive is shown below:
logfacility local7
If you want to disable logging to syslog:
logfacility none