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One useful feature of onstat output is the heading that indicates the database
server status. Whenever the database server is blocked, onstat displays the following line after the banner line:
Blocked: reason
The variable reason can take one of the following
values.
- Reason
- Description
- CKPT
- Checkpoint
- LONGTX
- Long transaction
- ARCHIVE
- Ongoing archive
- MEDIA_FAILURE
- Media failure
- HANG_SYSTEM
- Database server failure
- DBS_DROP
- Dropping a dbspace
- DDR
- Discrete high-availability data replication
- LBU
- Logs full high-watermark
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