Some users are running heavy query in production and it is impacting application. How can we auto kill long running queries from users (not from application user)?
Set a request timeout to have requests automatically terminated after some time. Be aware though that this is asynchronous so requests may run on for a bit after the timeout has expired. (i.e. It depends on the operation underway when a routine working on behalf of a request actually terminates).
See “queryTimeout” here: https://docs.couchbase.com/server/current/rest-api/rest-cluster-query-settings.html
You can set it at a node-level but this would impact all requests, including those from the application.
There isn’t a “per user” setting (there are no “per user” settings; only cluster, node or request levels).
This of course doesn’t limit the resources used whilst running within the permitted time limit. You can constrain document memory with a memory_quota setting. (See “queryMemoryQuota” here https://docs.couchbase.com/server/current/rest-api/rest-cluster-query-settings.html#_settings)
You can manually cancel individual queries via the UI (https://docs.couchbase.com/server/current/tools/query-monitoring.html#active-queries) or by deleting the appropriate entry from system:active_requests or the admin REST endpoint (https://docs.couchbase.com/server/current/n1ql/n1ql-rest-api/admin.html#_delete_active_request).
HTH.