Indicates the current transaction log space utilization relative to the transaction log thresholds.
Use this as a graphic indicator of how long before a threshold defined to the transaction log of the selected database kicks off.
By default each database has a "last chance" threshold defined. A DBA can optionally create other thresholds and assign an action or stored procedure to be executed when that threshold is crossed.
Each threshold is numbered T1 (default last chance threshold), T2, etc.
