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Using the Server Monitor

[ The Main Window | Server Statistics | Computer View | System Menu ]

Server Statistics

This panel shows the current server statistics. This is useful for viewing the server status in real-time.

Help for XR PerfMon Tools - Server Statistics View

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Server Statistics View

The following statistics are available:

	Server State: Current server state (running, stopped).
	Server Time: Current server time (important for timestamps).
	Groups: Number of OPC groups in the server.
	Clients Connected: Number of clients connected to the server.
	Scan Status: Current state of server data acquisition core (active, inactive).
	Active Computers: Number of computers under real-time monitoring.
	Active Computer Items: Number of computer items under real-time monitoring.
	Server Status: Current status of server (normal or scan overlap).

If the server status indicates scan overlaps, it means that your current configuration is not optimized for scanning all configured computers. Scan overlaps happen when the server time becomes insufficient to maintain the computer refresh rate. The main cause for this problem is a high response time from some computers, causing the server to wait too much time for a response. Here are some tips for improving performance:

	Disable the scan of unused computers. Make sure that the server is scanning only computers which will be used by your OPC clients.
	Remove all unused items that are published. Make sure that you are publishing only items that will be used by your OPC clients.
	On congested networks, the information may suffer high delays to reach the server. Make sure that the PerfMon server is connected to the monitored computers through good links.