VM Overview: General Information
The header area of the initial screen of the VM Overview (SM52) looks something like:
The meaning of the information is described below.
General Info, VMC Status, and Number of VMs
You can see the instance name, date, and time. In the second line you can tell whether the VM Container is running at all, how many VMs are actually instantiated, and the minimum and maximun number of VMs configured.
Possible Values |
Meaning |
VMC is active |
The VM Container is loaded and is running. |
VMC is not active |
The VM Container is loaded but not running. |
VMC is not loaded |
No VM Container set up in the system configuration. |
Status of the Shared Memory Garbage Collection
You can see whether, and in which form, the garbage collection for shared memory (shared GC, SGC) is active.
Possible Values |
Meaning |
Not Active |
No SGC is currently activated. |
Active, VMs should contribute |
An SGC is activated and is waiting for the (optional) memory release from one or more VMs. |
Active, VMs must contribute |
An SGC is activated and is waiting for the mandatory memory release from one or more VMs. |
Active, release of all non-referenced objects |
An SGC is activated and releases memory. |
VMC Memory Consumption
You can see the memory consumption of the VM Container: the absolute used memory in kB or MB, and the allocated memory as a percentage of the size of the shared pool. The actual used and allocated areas for the different memory classes are shown in brackets, as well as the memory used as a percentage of the allocated memory.
Possible Values |
Meaning |
Shared Pool |
Total size of the shared pool (contains all the objects named below) |
Global classes |
Classes in the shared memory of the VMC (shared classes) |
Global Programs |
JIT-compiled classes in the shared memory of the VMC (shared programs) |
Global data |
Data defined
cross-VM (
|
Globale Copy-Only Daten |
Copy-only data of the shared closure |
Globale Admin-Daten |
Unique indicator, messages |
Other Global Data |
All remaining objects in the shared memory of the VMC (for example, shared locks) |
Total |
Total consumption of all four memory classes |
Memory allocation |
Percentage of the shared pool used by allocated memory (you can see the percentage of the shared pool actually used in brackets) |
More information:
Memory
Management in the VM Container
Problems with memory consumption in the VMC are often due to the configuration. For more information, see SAP Note 1020539.
Any Errors That Occurred
Here you can see the number of identified errors noted in the system log (SM21) since the last initialization of the VM Container. Choose VMC ® Error Info to get details.
Information |
Meaning |
<Text> |
Short description of the cause of the error |
<time> |
Time the error occurred (hh:mm:ss) |
<user> |
User who started the program containing the error (field may be empty) |
<WP> |
Work process in which the error occurred |
<VM> |
Internal number of VM in which the error occurred |
<VM error text> |
Short description of the last error |
You can localize the error in the system log (transaction SM21).
More Information