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.
VMC Status and Number of VMs
You can see how many VMs are actually instantiated as well as the configured minimum and maximum numbers of VMs.
Possible Values |
Description |
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 |
Description |
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 in KB or MB, as well as the actual occupied areas and maximum allocable areas in bytes for various memory classes.
Possible Values |
Description |
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 (
|
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 |
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 |
Description |
<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).
See also: