pgAdmin 1.14 online documentation
In the appropriate context, pgAdmin III can trigger several maintenance
Restart node - Under some conditions, it may be
necessary to restart a slon process on a node, initialize as if freshly
started and make it reload its configuration. This can be triggered
remotely with the restart node function.
Lock set - Disables updates to a set to be
replicated. This is necessary for clean switch over the source of a
replication from one node to another.
Unlock set - Re-enables updates to a set to be
replicated after a previous lock.
Merge set - Joins two sets, originating from the
same node and subscribed by the same nodes, into one. This can be used
as a workaround to the fact that a subscribed set can't be
Move set - Moves a replication set from one node to
another, i.e. making the target node the new source. The old node will
become subscriber to the new provider node. This is the normal way how
to switch over gracefully the master role from one node to another.