Note
This view is available starting with V4.0.0.
Purpose
This view displays the information about MemTables and SSTables in each partition of the current tenant on all OBServer nodes.
Columns
Column |
Type |
Nullable |
Description |
|---|---|---|---|
| SVR_IP | VARCHAR2(46) | NO | The IP address of the server. |
| SVR_PORT | NUMBER(38) | NO | The port number of the server. |
| TABLE_TYPE | VARCHAR2(20) | NO | The type of the table. |
| LS_ID | NUMBER(38) | NO | The ID of the log stream. |
| TABLET_ID | NUMBER(38) | NO | The ID of the data tablet. |
| START_LOG_SCN | NUMBER(38) | NO | The left boundary of the log timestamp range of the data in the table. |
| END_LOG_SCN | NUMBER(38) | NO | The right boundary of the log timestamp range of the data in the table. |
| SIZE | NUMBER(38) | NO | The disk space occupied by the table, in bytes. |
| REF | NUMBER(38) | NO | The reference count of the table, in number of references. |
| UPPER_TRANS_VERSION | NUMBER(38) | NO | The maximum transaction version number of the committed transactions. |
| IS_ACTIVE | VARCHAR2(3) | NO | Indicates whether the MemTable is active. |
| CONTAIN_UNCOMMITTED_ROW | VARCHAR2(3) | NO | Indicates whether the table contains uncommitted transaction rows:
|
Sample query
In the user tenant, query the MemTable and SSTable information in each partition of log stream 1001 on all OBServer nodes.
obclient [SYS]> SELECT * FROM SYS.GV$OB_SSTABLES WHERE LS_ID=1001;
The query result is as follows:
+----------------+----------+------------------+-------+-----------+---------------------+---------------------+----------+------+---------------------+-----------+-------------------------+
| SVR_IP | SVR_PORT | TABLE_TYPE | LS_ID | TABLET_ID | START_LOG_SCN | END_LOG_SCN | SIZE | REF | UPPER_TRANS_VERSION | IS_ACTIVE | CONTAIN_UNCOMMITTED_ROW |
+----------------+----------+------------------+-------+-----------+---------------------+---------------------+----------+------+---------------------+-----------+-------------------------+
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 49402 | 0 | 1 | 0 | 0 | 1 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MINOR | 1001 | 49402 | 1 | 1743391602135333001 | 4007 | 0 | 4096 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | TX_DATA_MEMTABLE | 1001 | 49402 | 1743391602135333001 | 4611686018427387903 | 1048576 | 3 | 0 | YES | YES |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200008 | 0 | 1743357601723336000 | 634 | 0 | 1742884853812859000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200017 | 0 | 1743357601723336000 | 0 | 0 | 1743357601723336000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200059 | 0 | 1743357601723336000 | 0 | 0 | 1743357601723336000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200015 | 0 | 1743357601723336000 | 0 | 0 | 1743357601723336000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200007 | 0 | 1743357601723336000 | 710 | 0 | 1742884853812859000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200024 | 0 | 1743357601723336000 | 383 | 0 | 1743153227043218000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200016 | 0 | 1743357601723336000 | 0 | 0 | 1743357601723336000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200005 | 0 | 1743357601723336000 | 720 | 0 | 1742884853812859000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200060 | 0 | 1743357601723336000 | 0 | 0 | 1743357601723336000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MEMTABLE | 1001 | 200060 | 1 | 4611686018427387903 | 62914560 | 2 | 9223372036854775807 | YES | YES |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200012 | 0 | 1743357601723336000 | 624 | 0 | 1742884853812859000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200018 | 0 | 1743357601723336000 | 0 | 0 | 1743357601723336000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200013 | 0 | 1743357601723336000 | 623 | 0 | 1742884853812859000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 49401 | 0 | 1 | 0 | 0 | 1 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | TX_CTX_MEMTABLE | 1001 | 49401 | 1 | 2 | 0 | 2 | 0 | YES | YES |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200004 | 0 | 1743357601723336000 | 720 | 0 | 1742884853812859000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 49403 | 0 | 1 | 0 | 0 | 1 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MINI | 1001 | 49403 | 1 | 1743045514426661000 | 0 | 0 | 1743045514426661000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | LOCK_MEMTABLE | 1001 | 49403 | 1 | 1743045514426661000 | 0 | 3 | 0 | YES | YES |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200002 | 0 | 1743357601723336000 | 874 | 0 | 1742884853812859000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200003 | 0 | 1743357601723336000 | 838 | 0 | 1742884853812859000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200006 | 0 | 1743357601723336000 | 725 | 0 | 1742884853812859000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200010 | 0 | 1743357601723336000 | 653 | 0 | 1742884853812859000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200009 | 0 | 1743357601723336000 | 638 | 0 | 1742884853812859000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200011 | 0 | 1743357601723336000 | 633 | 0 | 1742884853812859000 | NO | NO |
| 11.xxx.xxx.xxx | 28825 | MAJOR | 1001 | 200001 | 0 | 1743357601723336000 | 0 | 0 | 1743357601723336000 | NO | NO |
+----------------+----------+------------------+-------+-----------+---------------------+---------------------+----------+------+---------------------+-----------+-------------------------+
29 rows in set