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doris/docs/en/sql-reference/sql-statements/Administration/ADMIN-DIAGNOSE-TABLET.md
Mingyu Chen ce50c4d826 [feature](diagnose) support "ADMIN DIAGNOSE TABLET" stmt (#8839)
`ADMIN DIAGNOSE TABLET tablet_id`

This statement makes it easier to quickly diagnose the status of a tablet.
See "ADMIN-DIAGNOSE-TABLET.md" for details

```
mysql> admin diagnose tablet 10196;
+----------------------------------+------------------------------+------------+
| Item                             | Info                         | Suggestion |
+----------------------------------+------------------------------+------------+
| TabletExist                      | Yes                          |            |
| TabletId                         | 10196                        |            |
| Database                         | default_cluster:db1: 10192   |            |
| Table                            | tbl1: 10194                  |            |
| Partition                        | tbl1: 10193                  |            |
| MaterializedIndex                | tbl1: 10195                  |            |
| Replicas(ReplicaId -> BackendId) | {"10197":10002}              |            |
| ReplicasNum                      | OK                           |            |
| ReplicaBackendStatus             | Backend 10002 is not alive.  |            |
| ReplicaVersionStatus             | OK                           |            |
| ReplicaStatus                    | OK                           |            |
| ReplicaCompactionStatus          | OK                           |            |
+----------------------------------+------------------------------+------------+
```
2022-04-07 11:30:03 +08:00

2.3 KiB

title, language
title language
ADMIN DIAGNOSE TABLET en

ADMIN DIAGNOSE TABLET

description

This statement is used to diagnose the specified tablet. The results will show information about the tablet and some potential problems.

grammar:

    ADMIN DIAGNOSE TABLET tblet_id

illustrate:

    The lines of information in the result are as follows:
    1. TabletExist:                         Whether the Tablet exists
    2. TabletId:                            Tablet ID
    3. Database:                            The DB to which the Tablet belongs and its ID
    4. Table:                               The Table to which Tablet belongs and its ID
    5. Partition:                           The Partition to which the Tablet belongs and its ID
    6. MaterializedIndex:                   The materialized view to which the Tablet belongs and its ID
    7. Replicas(ReplicaId -> BackendId):    Tablet replicas and their BE.
    8. ReplicasNum:                         Whether the number of replicas is correct.
    9. ReplicaBackendStatus:                Whether the BE node where the replica is located is normal.
    10.ReplicaVersionStatus:                Whether the version number of the replica is normal.
    11.ReplicaStatus:                       Whether the replica status is normal.
    12.ReplicaCompactionStatus:             Whether the replica Compaction status is normal.

example

1. Diagnose tablet 10001

    ADMIN DIAGNOSE TABLET 10001;

keyword

ADMIN,DIAGNOSE,TABLET