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Redshift wlm queue11/21/2023 ![]() Select * from SVL_STATEMENTTEXT where text ilike '%abort%' and xid in (select xid from STL_QUERY where query = ) In (select xid from STL_QUERY where query = ) To check if a particular query was stopped or canceled by a user (such as a superuser), run the following query with your query ID: select * from SVL_STATEMENTTEXT where text ilike '%cancel%' and xid For more information, see Modifying a parameter group. Check your cluster parameter group and any statement_timeout configuration settings for additional confirmation. Statement timeouts can also be set in the cluster parameter group. To verify whether a query was canceled because of a statement timeout, run the following query: select * from SVL_STATEMENTTEXT where text ilike '%set%statement_timeout%to%' and pid in (select pid from STL_QUERY where query = ) "ERROR: Query (150) cancelled on user's request" When a statement timeout is exceeded, then queries submitted during the session are canceled with the following error message: The statement_timeout value is the maximum amount of time that a query runs before Amazon Redshift terminates it. For more information, see WLM query queue hopping. You can only hop a query if there's a matching queue available for the user group or query group configuration. Verify that the queues match the WLM configuration. Run the following query for more information on the service_class to queue mapping: select * from stv_wlm_service_class_config where service_class>5 Īfter you get the queue mapping information, check the WLM configuration from the Amazon Redshift console. ![]() For example, service_class 6 might list Queue1 in the WLM configuration, and service_class 7 might list Queue2. In your output, the service_class entries 6-13 include the user-defined queues. If your query is canceled with this error message, then run the following query to check the user-defined queues: select * from stl_wlm_query where query= "ERROR: Query (500104) canceled on user's request and ran out of wlm queues for restart." If a query is hopped but no matching queues are available, then the canceled query returns the following error message: Note: You can hop queries only in a manual WLM configuration. For more information, see Properties for the wlm_json_configuration parameter. A canceled query isn't reassigned to the default queue. If the query doesn't match a queue definition, then the query is canceled. When a query is hopped, WLM attempts to route the query to the next matching queue based on the WLM queue assignment rules. If your query ID is listed in the output, then increase the time limit in the WLM QMR parameter.Įxample 2: No available queues for the query to be hoppedĪ query can be hopped if the "hop" action is specified in the query monitoring rule. The query output lists all queries that are canceled by the "abort" action. To identify whether a query was canceled because of an "abort" action, run the following query: select * from STL_WLM_RULE_ACTION where action = 'abort' "ERROR: Query (500029) cancelled by WLM abort action of Query Monitoring Rule "testrule"." If a query is canceled because of the abort action that's specified in a query monitoring rule, then the query returns the following error: For example, create a rule that cancels queries that run for more than a 60-second threshold.Įxample 1: Abort action specified in the query monitoring rule Or, specify the actions that Amazon Redshift takes when a query exceeds the WLM time limits. ![]() Resolution Setup of Amazon Redshift WLM query monitoring rulesĬreate WLM query monitoring rules (QMRs) to define metrics-based performance boundaries for your queues. Schedule long-running operations outside of maintenance windows. ![]() To prevent your query from being stopped, complete the following steps: Setup of Amazon Redshift workload management (WLM) query monitoring rules.A query can be canceled in Amazon Redshift for the following reasons: ![]()
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