PostgreSQL version:


Sets the maximum number of workers that the system can support for parallel queries. The default value is 8. When increasing or decreasing this value, consider also adjusting max_parallel_workers_per_gather. Also, note that a setting for this value which is higher than max_worker_processes will have no effect, since parallel workers are taken from the pool of worker processes established by that setting.


… if you think you can benefit from parallel query, and even cores/1 for DW systems.


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