VM Overview
Use
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.
Integration
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.
You can get an
overview of all instances in transaction SM51 (see
Overview of SAP
Application
Server.
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).
Prerequisites
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
Architecture of the VM
Container
Features
The VM Overview provides 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:
● Show or hide header area
● Show or hide VMs of certain types
● Hide VMs depending on Status
● Determine occupation and allocation limits for memory.
In the standard setting everything is shown. {0>You can find details of VM types and states in VM Overview: Table of VMs.<0}
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 go to other transactions from here.
Header Area
The header area contains general information on the VM Container:
● Status of the VM Container
● Garbage collection of the shared memory (Shared GC)
● Memory consumption of the VM Container (used/allocated): for individual areas, total, and percentage
● Any Errors That Occurred
For details about this information (possible values and their meaning) see VM Overview: General Information.
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:
Edit: VM and Program Functions
● Goto: You can go directly to other transactions from here:
○
Process overview
(transaction SM50; see
Displaying and
Controlling Work Processes).
VMC System Administration (transaction SM53)
○ 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).
The remaining menus in the menu bar contain general functions for the system and for setting the ALV control. They are not described here.