Improved and more efficient techniques are described for reducing the
amount of work that needs to be performed by a database in a computer
network in order to distribute event summary data to a large number of
administrator clients. Delays experienced by event data at a database,
e.g., due to delays in accessing a database, are reduced so that client
can be notified of the events as soon as possible. Furthermore, event
data obtained from both local and remote networks is efficiently
coordinated using replica and union processes. Each monitoring location
in the network includes both locally generated events, and a copy of
remotely-generated events which are provided and maintained by one or
more remote monitoring locations. The monitoring locations update one
another with their event data.