This has the explanations for each state: SAP HANA Reference: M_LOG_SEGMENTS
Full description
This view describes each allocated log segment and shows its current state and log position range, which is currently contained in this segment.
The following log segment states exist:
- Formatting - The log segment is being formatted and not yet used.
- Preallocated - The log segment has been preallocated, but never used.
- Writing - The log segment is currently being written.
- Closed - The log segment is closed, not backed up and is still required for restart.
- Truncated - The log segment is not required for restart, but has not been backed up.
- BackedUp - The log segment has been backed up, but is still required for restart.
- Free - The log segment has been backed up, it is not required for restart and can be reused.