Detecting idle periods at network endpoints for management actions at processing clusters for managed databases

A method, comprising:

• monitoring, by a leader node of a processing cluster that implements query planning and execution to instruct one or more compute nodes in accordance with a query plan generated by the leader node to perform a query to a database, information indicative of client activity received via a network endpoint at a proxy service associated with the database managed by a database service to detect an idle period for the database, wherein the processing cluster including the leader node receives client requests from the proxy service that are directed to the database over a network;
• determining, by the leader node, a management action for the processing cluster to perform during the detected idle period for the database;
• and
• causing, by the leader node, the management action for the processing cluster to be performed, wherein the database is available for read requests received via the network endpoint during performance of the management action by another processing cluster of the database service.

One or more non-transitory, computer-readable storage media, storing program instructions that when executed on or across one or more computing devices cause the one or more computing devices to implement:

• monitoring, by a leader node of a processing cluster that implements query planning and execution to instruct one or more compute nodes in accordance with a query plan generated by the leader node to perform a query to a database, a network endpoint at a proxy service associated with the database managed by a database service to detect an idle period for the database, monitoring, by a leader node of a processing cluster that implements query planning and execution to instruct one or more compute nodes in accordance with a query plan generated by the leader node to perform a query to a database, information indicative of client activity received via a network endpoint at a proxy service associated with the database managed by a database service to detect an idle period for the database, wherein the processing cluster including the leader node receives client requests from the proxy service that are directed to the database over a network, and wherein the database was created in response to a request that specified that the database was to be managed by the database service;
• determining, by the leader node, a management action for the processing cluster to perform during the detected idle period for the database;
• and
• causing, by the leader node, the management action for the processing cluster to be performed, wherein the database is available for read requests received via the network endpoint during performance of the management action.