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pg_stat_resqueues

Note: The pg_stat_resqueues view is valid only when resource queue-based resource management is active.

The pg_stat_resqueues view allows administrators to view metrics about a resource queue's workload over time. To allow statistics to be collected for this view, you must enable the stats_queue_level server configuration parameter on the Greenplum Database master instance. Enabling the collection of these metrics does incur a small performance penalty, as each statement submitted through a resource queue must be logged in the system catalog tables.

Table 1. pg_catalog.pg_stat_resqueues
column	type	description
`queueoid`	oid	The OID of the resource queue.
`queuename`	name	The name of the resource queue.
`n_queries_exec`	bigint	Number of queries submitted for execution from this resource queue.
`n_queries_wait`	bigint	Number of queries submitted to this resource queue that had to wait before they could execute.
`elapsed_exec`	bigint	Total elapsed execution time for statements submitted through this resource queue.
`elapsed_wait`	bigint	Total elapsed time that statements submitted through this resource queue had to wait before they were executed.