From: Tom Lane <tgl@sss.pgh.pa.us>
To: James Pang (chaolpan) <chaolpan@cisco.com>
Cc: pgsql-admin@lists.postgresql.org <pgsql-admin@lists.postgresql.org>
Subject: Re: multiple sessions to create index in parallel support
Date: Tue, 21 Jun 2022 11:03:48 -0400
Message-ID: <2971652.1655823828@sss.pgh.pa.us> (raw)
In-Reply-To: <PH0PR11MB5191BB64F516447A79FD4AA6D6B39@PH0PR11MB5191.namprd11.prod.outlook.com>
References: <PH0PR11MB5191540CA8085CAA8944A114D6B39@PH0PR11MB5191.namprd11.prod.outlook.com>
<2944693.1655821801@sss.pgh.pa.us>
<PH0PR11MB5191BB64F516447A79FD4AA6D6B39@PH0PR11MB5191.namprd11.prod.outlook.com>
"James Pang (chaolpan)" <chaolpan@cisco.com> writes:
> Max_parallel_workers and max_parallel_maintenance_workers both equal to 32, one session create one index in a large table show parallel 8 workers, the other session creating one index in another separate table always in serial. Even increase max_parallel_worers and max_parallel_maintenance_workers to 64, still show one is parallel 8 workers, the other is done in serial.
Hmm, what about max_worker_processes ? That's an independent limit.
regards, tom lane
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To: pgsql-admin@postgresql.org
Cc: tgl@sss.pgh.pa.us, chaolpan@cisco.com, pgsql-admin@lists.postgresql.org
Subject: Re: multiple sessions to create index in parallel support
In-Reply-To: <2971652.1655823828@sss.pgh.pa.us>
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