6. Using the Replicator Server : How Server Behavior Is Controlled : Server Monitoring Configurations : Replication Activity Monitoring
 
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Replication Activity Monitoring
The status of a server is sent to the Activity page in the Visual DBA Performance Monitor window or the Replication Monitor window at server startup, shutdown, and in response to a ping operation. The ping operation returns the status of the server and its error count.
Note:  It is recommended that you use the rsstatd command to display Replicator Server statistics that are cumulative from server startup. Using rsstatd does not incur dbevent overhead.
You can monitor your system more closely with the Send Notifications flag
(-MON). The -MON flag causes the servers to issue activity notifications.
The -MON and Send No Notifications (-NMO) flags control whether the server issues activity notifications. Every time a row is propagated to a target and every time a transaction is committed, a notification is sent (or not sent if -NMO is selected) that updates the Incoming Records, Outgoing Records, and Activity display fields in the Performance Monitor or Replication Monitor. The -MON and -NMO flags also cause the server to notify the Performance Monitor or Replication Monitor when an error occurs. The default is -MON.
Though the -NMO flag stops the server from issuing activity notifications on errors, you can ping a server to obtain its status, overriding any -NMO flag.