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Warning:
As of May 16, 2023, CockroachDB v21.2 is no longer supported. For more details, refer to the Release Support Policy.
The SHOW STATEMENTS statement lists details about currently active SQL queries, including:
- The internal ID of the query
- The node executing the query
- The SQL query itself
- How long the query has been running
- The client address, application name, and user that issued the query
- The ID for the current session
These details let you monitor the progress of active queries and, if necessary, identify those that may need to be cancelled to prevent unwanted resource consumption.
Note:
Schema changes and BACKUP/RESTORE statements are not executed as queries internally and so are not listed by SHOW STATEMENTS. To monitor such statements, use SHOW JOBS instead.
Aliases
In CockroachDB, the following are aliases for SHOW STATEMENTS:
SHOW QUERIES
Required privileges
All users can see their own currently active queries. All users belonging to the admin role can view all users' currently active queries. To view other non-admin users' queries, the non-admin user must have the VIEWACTIVITY parameter set.
Synopsis
- To list the active queries across all nodes of the cluster, use
SHOW STATEMENTSorSHOW CLUSTER STATEMENTS. - To list the active queries just on the local node, use
SHOW LOCAL STATEMENTS.
Response
The following fields are returned for each query:
| Field | Description |
|---|---|
query_id |
The ID of the query. |
node_id |
The ID of the node. |
session_id |
The ID of the session. |
user_name |
The username of the connected user. |
start |
The timestamp at which the query started. |
query |
The SQL query. |
client_address |
The address and port of the client that issued the SQL query. |
application_name |
The application name specified by the client, if any. For queries from the built-in SQL client, this will be $ cockroach sql. |
distributed |
If true, the query is being executed by the Distributed SQL (DistSQL) engine. If false, the query is being executed by the standard "local" SQL engine. If NULL, the query is being prepared and it's not yet known which execution engine will be used. |
phase |
The phase of the query's execution. If preparing, the statement is being parsed and planned. If executing, the statement is being executed. |
Examples
List queries across the cluster
> SHOW CLUSTER STATEMENTS;
query_id | node_id | session_id | user_name | start | query | client_address | application_name | distributed | phase
+----------------------------------+---------+----------------------------------+-----------+----------------------------------+-----------------------------------------------------------------------+-----------------+------------------+-------------+-----------+
15f92b12b2fb95b00000000000000002 | 2 | 15f92b10b92ed4080000000000000002 | root | 2020-03-04 17:48:23.309592+00:00 | SELECT city, id FROM vehicles WHERE city = $1 | 127.0.0.1:65092 | | false | executing
15f92b12b2ea5f700000000000000001 | 1 | 15f92adefd48d8a00000000000000001 | root | 2020-03-04 17:48:23.3085+00:00 | SHOW CLUSTER STATEMENTS | 127.0.0.1:64970 | $ cockroach sql | false | executing
15f92b12b2ffeb100000000000000003 | 3 | 15f92b0e4ea399680000000000000003 | root | 2020-03-04 17:48:23.30989+00:00 | UPSERT INTO vehicle_location_histories VALUES ($1, $2, now(), $3, $4) | 127.0.0.1:65088 | | NULL | preparing
(3 rows)
Alternatively, you can use SHOW STATEMENTS to receive the same response.
List queries on the local node
> SHOW LOCAL STATEMENTS;
query_id | node_id | session_id | user_name | start | query | client_address | application_name | distributed | phase
+----------------------------------+---------+----------------------------------+-----------+----------------------------------+------------------------------------------------------------+-----------------+------------------+-------------+-----------+
15f92b15bece88900000000000000001 | 1 | 15f92aefb240d2980000000000000001 | root | 2020-03-04 17:48:36.392919+00:00 | INSERT INTO user_promo_codes VALUES ($1, $2, $3, now(), 1) | 127.0.0.1:65044 | | false | executing
15f92b15bed80a280000000000000001 | 1 | 15f92adefd48d8a00000000000000001 | root | 2020-03-04 17:48:36.393495+00:00 | SHOW LOCAL STATEMENTS | 127.0.0.1:64970 | $ cockroach sql | false | executing
(2 rows)
Filter for specific queries
You can use a SELECT statement to filter the list of active queries by one or more of the response fields.
Show all queries on node 2
> SELECT * FROM [SHOW CLUSTER STATEMENTS]
WHERE node_id = 2;
query_id | node_id | session_id | user_name | start | query | client_address | application_name | distributed | phase
+----------------------------------+---------+----------------------------------+-----------+----------------------------------+-----------------------------------------------------------------------+-----------------+------------------+-------------+-----------+
15f92b1cb931f6900000000000000002 | 2 | 15f92b10b92ed4080000000000000002 | root | 2020-03-04 17:49:06.363515+00:00 | UPSERT INTO vehicle_location_histories VALUES ($1, $2, now(), $3, $4) | 127.0.0.1:65092 | | NULL | preparing
(1 row)
Show all queries from a specific address and user
> SELECT * FROM [SHOW CLUSTER STATEMENTS]
WHERE client_address = '127.0.0.1:65196' AND user_name = 'maxroach';
query_id | node_id | session_id | user_name | start | query | client_address | application_name | distributed | phase
+----------------------------------+---------+----------------------------------+-----------+----------------------------------+-----------------------------------------------+-----------------+------------------+-------------+-----------+
15f92bf4b27f0b480000000000000002 | 2 | 15f92b7dc85b7ba80000000000000002 | maxroach | 2020-03-04 18:04:33.964083+00:00 | SELECT city, id FROM vehicles WHERE city = $1 | 127.0.0.1:65196 | | false | executing
(1 row)
Exclude queries from the built-in SQL client
To exclude queries from the built-in SQL client, filter for queries that do not show $ cockroach sql as the application_name:
> SELECT * FROM [SHOW CLUSTER STATEMENTS]
WHERE application_name != '$ cockroach sql';
query_id | node_id | session_id | user_name | start | query | client_address | application_name | distributed | phase
+----------------------------------+---------+----------------------------------+-----------+----------------------------------+-----------------------------------------------------------------------+-----------------+------------------+-------------+-----------+
15f92c0dd24bec200000000000000003 | 3 | 15f92b0e4ea399680000000000000003 | root | 2020-03-04 18:06:21.871708+00:00 | SELECT city, id FROM vehicles WHERE city = $1 | 127.0.0.1:65088 | | false | executing
15f92c0dd26655d80000000000000001 | 1 | 15f92be36964ac800000000000000001 | root | 2020-03-04 18:06:21.873515+00:00 | UPSERT INTO vehicle_location_histories VALUES ($1, $2, now(), $3, $4) | 127.0.0.1:65240 | | false | executing
15f92c0dd25882c80000000000000001 | 1 | 15f92aefb240d2980000000000000001 | root | 2020-03-04 18:06:21.872608+00:00 | UPSERT INTO vehicle_location_histories VALUES ($1, $2, now(), $3, $4) | 127.0.0.1:65044 | | false | executing
15f92c0dd262cb980000000000000002 | 2 | 15f92b7dc85b7ba80000000000000002 | maxroach | 2020-03-04 18:06:21.873286+00:00 | SELECT city, id FROM vehicles WHERE city = $1 | 127.0.0.1:65196 | | false | executing
Cancel a query
When you see a query that is taking too long to complete, you can use the CANCEL QUERY statement to end it.
For example, let's say you use SHOW CLUSTER STATEMENTS to find queries that have been running for more than 3 hours:
> SELECT * FROM [SHOW CLUSTER STATEMENTS]
WHERE start < (now() - INTERVAL '3 hours');
query_id | node_id | session_id | user_name | start | query | client_address | application_name | distributed | phase
+----------------------------------+---------+----------------------------------+-----------+---------------------------------+---------------------+-----------------+------------------+-------------+-----------+
15f92c745fe203600000000000000001 | 1 | 15f92c63d4b393b80000000000000001 | root | 2020-03-04 18:13:42.33385+00:00 | SELECT * FROM rides | 127.0.0.1:65287 | $ cockroach sql | true | executing
(1 row)
To cancel this long-running query, and stop it from consuming resources, you note the query_id and use it with the CANCEL QUERY statement:
> CANCEL QUERY '15f92c745fe203600000000000000001';
See also
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