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SVV_TRANSACTIONS - Amazon Redshift
Table columnsSample queries
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SVV_TRANSACTIONS

Records information about transactions that currently hold locks on tables in the database. Use the SVV_TRANSACTIONS view to identify open transactions and lock contention issues. For more information about locks, see Managing concurrent write operations and LOCK.

SVV_TRANSACTIONS is visible to all users. Superusers can see all rows; regular users can see only their own data. For more information, see Visibility of data in system tables and views.

Table columns

Column name Data type Description
txn_owner text Name of the owner of the transaction.
txn_db text Name of the database associated with the transaction.
xid bigint Transaction ID.
pid integer Process ID associated with the lock.
txn_start timestamp Start time of the transaction.
lock_mode text Name of the lock mode held or requested by this process. If lock_mode is ExclusiveLock and granted is true (t), then this transaction ID is an open transaction.
lockable_object_type text Type of object requesting or holding the lock, either relation if it is a table or transactionid if it is a transaction.
relation integer Table ID for the table (relation) acquiring the lock. This value is NULL if lockable_object_type is transactionid.
granted boolean Value that indicates whether that the lock has been granted (t) or is pending (f) .

Sample queries

The following command shows all active transactions and the locks requested by each transaction.

select * from svv_transactions;

 txn_                                                                                 lockable_     
 owner | txn_db |  xid   |  pid  |         txn_start          |      lock_mode      | object_type    | relation | granted
-------+--------+--------+-------+----------------------------+---------------------+----------------+----------+---------
 root  | dev    | 438484 | 22223 | 2016-03-02 18:42:18.862254 | AccessShareLock     | relation       |   100068 | t
 root  | dev    | 438484 | 22223 | 2016-03-02 18:42:18.862254 | ExclusiveLock       | transactionid  |          | t
 root  | tickit | 438490 | 22277 | 2016-03-02 18:42:48.084037 | AccessShareLock     | relation       |    50860 | t
 root  | tickit | 438490 | 22277 | 2016-03-02 18:42:48.084037 | AccessShareLock     | relation       |    52310 | t
 root  | tickit | 438490 | 22277 | 2016-03-02 18:42:48.084037 | ExclusiveLock       | transactionid  |          | t
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | AccessExclusiveLock | relation       |   100068 | f
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | RowExclusiveLock    | relation       |    16688 | t
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | AccessShareLock     | relation       |   100064 | t
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | AccessExclusiveLock | relation       |   100166 | t
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | AccessExclusiveLock | relation       |   100171 | t
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | AccessExclusiveLock | relation       |   100190 | t
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | ExclusiveLock       | transactionid  |          | t
(12 rows)

(12 rows)