Heap Usage 

In the Memory Areas user menu, you can find, among other things, a display of the OMS heap usage since the last start of the liveCache Monitoring.

Prerequisites

The user has been assigned a role in accordance with the authorization concept. You are in the user menu of the user with the authorizations that correspond to this role.

The liveCache database instance is in the ONLINE operational state.

Procedure

...

       1.      In the user menu, choose liveCache Assistant(transaction LC10).

       2.      Enter the name of the database connection.
You can select the name from the list of existing names. You can restrict the search for the required name.

       3.      Choose liveCache → Monitoring.

       4.      Choose Current Status →Memory Areas →Heap Usage.

Result

The OMS Heap configuration parameters are displayed:

OMS_HEAP_LIMIT, OMS_HEAP_THRESHOLD, OMS_HEAP_BLOCKSIZE, OMS_HEAP_COUNT

The current values of the following memory areas are displayed:

Data cache, converter, maximum heap usage and system heap

The system displays the following information OMS heap usage.

Heap Area	Name of the OMS heap
Size	Size of the memory controlled by the OMS heap
Currently occupied	Size of the memory actually occupied by the OMS heap
Memory Requests	Number of memory requests in the OMS heap
Memory Releases	Number of memory releases in the OMS heap
Requests through Block Allocator	Number of OMS heap memory requests through the corresponding block allocator
Releases through Block Allocator	Number of OMS heap memory releases through the corresponding block allocator
Spinlocks	Number of synchronizations through spinlocks
Collisions	Number of collisions that occurred during synchronizations through spinlocks
Spinloops, Yieldloops, MAX Spinloops, MAX Yieldloops	An interpretation of these details requires knowledge of spinlock implementation.

See also:

liveCache Alert Monitor, Memory

Monitoring the Main Memory Areas

Concepts of the Database System, liveCache Parameters