Using the ICM Monitor (SAP Library - Administration of the Internet Communication Manager)

Using the ICM Monitor

Use

You can use this transaction (SMICM) to monitor and administrate the Internet Communication Manager, which sends and receives requests to and from the Internet.

Prerequisites

The Internet Communication Manager is running on the application server instance. In the Structure link Server Overview (transaction SM51) you can see the server work process types offered and also the entry ICM.

Features

To start the ICM monitor from the SAP menu choose Administration ® System Administration ® Monitor ® System Monitoring ® ICM Monitor, or enter transaction SMICM.

On the initial screen you can see general information about the status and configuration of the ICM and the list of configured Worker Threads, which shows the activities of each worker thread. This is a snapshot view that will usually change when you choose Refresh.

Initial Screen: ICM Status

This graphic is explained in the accompanying text

General Information About the ICM

In the upper area are the following details:

ICM Monitor – Header Area

Field	Values and Description	Changing the Value
ICM Status	Posible statuses are running (gree traffic light), maintenance (yellow traffic light) and not running (red traffic light).	Using menu functions; see ICM Administration
Restart after error	Indicates whether the ICM should be automatically restarted following an error.	Using menu functions; see ICM Administration
Trace level (0-3)	Currently active Trace Level	Using menu functions, see Monitoring the ICM Status
Created Worker Threads	When the ICM is created, a (configurable) set of worker threads is created (icm/min_threads). If needed while it is running it will create further worker threads (up to the configured maximum icm/max_threads). If capacity is not used, the ICM can remove excess threads Here you can see how many threads currently exist (current), the maximum number of threads that have existed since startup (peak) and how many could exist (maximum).	Created dynamically; quota is changed in the profile parameter, see Parameterization of the ICM.
Connections used	Number of existing connections. Process is the same as with worker threads (minimum 0, maximum icm/max_conn)	Created dynamically; maximum value is changed in the profile parameter, see Parameterization of the ICM.
Queue Entries Used	Number of entries in the request queue in the ICM. Process is the same as with worker threads (minimum 0, maximum icm/req_queue_len)	Created dynamically; maximum value is changed in the profile parameter, see Parameterization of the ICM.

List of Worker Threads

The fields in the display have the following meaning:

Field	Description
No.	Thread number: The threads that are available for processing (receiving or sending) requests are numbered by the ICM (like the work processes by the dispatcher).
Thread ID	The thread ID that is assigned by the operating system (analogous to the PID for processes).
Number	The number of requests that were processed by this thread.
State	The current status of the thread. The following values are permitted: Free: The thread is waiting for a request. Running: The thread is processing a request. In this case, you can display detailed information by double-clicking on the line. Column Processed Request also displays more information.
Processed request	The type of request that the thread is currently processing. Possible values are:
	Blank field	No action
	Administration	Action that is triggered from transaction SMICM or program icmon, for example, display list. For this reason at least one thread always displays Administration, if you call SMICM.
	Read request	Reads the request (server)
	Read response	Reads the response (client)
	Write request	Writes the request (client)
	Write response	Writes the response (server)
	Open Connection	Sets up connection to a server
	Close connection	Closes connection to a partner
	Accept connection	Accepts the connection from a client
	Time-dependent action	Executes time-dependent (periodically scheduled) events
	Execute shutdown	Ends ICM
	Wait for response (SERV)	Waits for a response from the application server (SAP Web AS is a server with active connections)
	Wait for response (CLNT)	Waits for a request from the application server (SAP Web AS is a server with active connections)

ICM Functions for Administration and Monitoring

From the menu on this initial screen, you can use various functions. These are described in detail in the following sections:

● Monitoring the State: Maintenance of services (ports), configuration and display of trace and log files, ICM parameters, release notes, statistics, and so on.

● Monitoring and Administration of the ICM Server Cache: Display of cache contents, invalidation of cachecontents or entire cache.

● Displaying and Changing Services: ICM ports for requests, creating, changing, and deleting various protocols.

● ICM Administration: Start, stop, restart ICM, move to maintenance mode; reload configuration.

● Administration of J2EE Engine: Start, stop, restart J2EE Engine.