VM Overview
The VM Overview(transaction SM52) provides an overview of the status of the Java virtual machines (VMs) in the VM Container(VMC) on the SAP NetWeaver Application Server (AS). It also allows you to manage the VM Container and the individual VMs at runtime.
The VM overview refers to the SAP instance you are logged on to. You can monitor and manage the Java VMs that share the work processes in this instance.
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You can get an overview of all instances in transaction SM51 (see Overview of SAP Application Servers).
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You can get an overview of all work processes in the instance you are logged on to in transaction SM50 (see Displaying and Controlling Work Processes).
You understand the basic concepts and architecture of the VM Container.
You can find more information in the following sections:
Architecture of the SAP NetWeaver Application Server
The VM Overviewprovides an overview and details of the VMs in the VM Container. The settings and current values of the individual VMs are displayed in a table.
The menu functions allow you to change the various VM properties.
The initial screen of the VM Overview(transaction SM52 or SAP menu 
Administration 
System Administration Monitor System Monitoring VM Overview 
) shows an ALV control with a header areas and table body.
You can configure the list display. Choose List Configure . You can edit the layout as follows:
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Show or hide header area
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Show or hide VMs of certain types
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Hide VMs depending on Status
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Determine occupation and allocation limits for memory.
In the standard setting everything is shown. For can find more details about VM types and statuses under VM Overview: Table of VMs.
Three transaction-specific menus in the menu bar allow you to carry out administrative tasks on the VMC, the VMs, and the application programs you are running. You can also branch to other transactions from here.
Header Area
The header area contains general information on the VM Container:
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Status of the VM Container
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Garbage collection of the shared memory ( Shared GC)
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Memory consumption of the VM Container ( used/allocated): for individual areas, total, and percentage
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Any Errors That Occurred
For details about this information (possible values and their meaning), see VM Overview: General Information.
table body
Table body The table on the overview screen shows the list of VMs currently instantiated, and for each VM details of its current status, work process assignment, VM usage type, user, executed program, as well as other technical information.
For more information, see VM Overview: Table of VMs.
Menu Functions
The menu consists of the functions VMC, Edit, Goto, List, System, and Help.
The first three are used for administrative tasks for the VMC, the VMs, and the application programs you are running. You can also go to other transactions from here.
For more information see the following sections:
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Edit: VM and Program Functions
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Goto: You can go directly to other transactions from here:
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Process overview (transaction SM50; see Displaying and Controlling Work Processes).
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VMC System Administration(transaction SM53)
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System-wide display: Here you get an overview of all the VMs configured on instances of this SAP system. You can also reset the VM Container across all systems (
VMC Reset ).
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The remaining menus in the menu bar contain general functions for the system and for setting the ALV control. They are not described here.