Hi hack13
Seems I missed to mention something in the addon help
No crontab is required for update. The search module takes the value of "default_snapshot_period" in the section [DataSnapshot] in your OpenSim.ini and tells this value at the beginning of each inworld search to jOpenSim. jOpenSim then will look if the last update was longer ago than this period (in seconds) and will automatically force an update in case it is older. This is also happening each time a user is logging in.
Optionally you also can force a search update in your console with the command "search update".
Greetz
FoTo50