VM Overview: General Information
The header area of the initial screen of the VM Overview (SM52) looks something like:
VMC Status and Number of VMs
You see the instance name, date, and time. From the second row you can see if the VM Container is running at all and how many VMs are actually instantiated as well as the configured minimum and maximum number of VMs.
|
Possible Values |
Meaning |
|
VMC is active |
The VM Container is loaded and is running. |
|
VMC is inactive |
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 in KB or MB, as well as the actual occupied areas and maximum allocable areas in bytes for various memory 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).
|
Possible Values |
Meaning |
|
Shared Pool |
Total size of shared pool (contains all in the following named objects) |
|
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 ( Shared Closures) |
|
Other Global Data |
Copy-Only Data of Shared Closures |
|
Global Admin Data |
Unique Description, 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 Usage |
Percentage usage of the shared pool through allocated memory (in brackets you can see what percentage of the shared pool is actually used) |
More information: Memory Management in the VM Container
With errors in the memory usage of the VMC, errors are often in the configuration. 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).