DBA_HIST_THREAD displays historical thread information from the control file.
| Column | Datatype | NULL | Description | 
|---|---|---|---|
| SNAP_ID | NUMBER | NOT NULL | Unique snapshot ID | 
| DBID | NUMBER | NOT NULL | Database ID for the snapshot | 
| INSTANCE_NUMBER | NUMBER | NOT NULL | Instance number for the snapshot | 
| THREAD# | NUMBER | NOT NULL | Thread number | 
| THREAD_INSTANCE_NUMBER | NUMBER | Instance number of the thread | |
| STATUS | VARCHAR2(6) | Thread status ( OPEN) or (CLOSED) | |
| OPEN_TIME | DATE | Last time the thread was opened | |
| CURRENT_GROUP# | NUMBER | Current log group | |
| SEQUENCE# | NUMBER | Sequence number of the current log |