In the Configuration user menu of the DBA Cockpit, you will find, among other things, a display of the accesses to the main memory structures.
Open the DBA Cockpit (transaction DBACOCKPIT) and select .
The system displays an overview of the accesses to the main memory structures that are only used exclusively: critical sections (so-called synchronization objects, which are administered by special semaphores (also called regions)). You can see which thread (task) is accessing the corresponding main memory structure.
You can use these statistics to determine the cache activity and any resource conflicts that might exist. These conflicts can occur if a resource is requested more than once at a particular time.
If the number of conflicts is more than 10 % of all accesses, this indicates significant bottlenecks in your system.
Synchronization Object | Explanation |
---|---|
OMS2 | Synchronization of the OMS heap |
OMS3 | Synchronization of the OMS monitor |
OMS4 | Synchronization of the unloading of versions |
OMS5 | Synchronization of the version directory |
OMS6 | Synchronization of the shared heap counter |
OMS7 | Synchronization of the stack heap counter |
OMS8-OMS<n> | User-defined synchronization objects |