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From: Tom Lane <tgl@sss.pgh.pa.us>
To: James Pang (chaolpan) <chaolpan@cisco.com>
Cc: Jim Mlodgenski <jimmy76@gmail.com>
Cc: pgsql-performance@lists.postgresql.org <pgsql-performance@lists.postgresql.org>
Subject: Re: alter table xxx set unlogged take long time
Date: Tue, 26 Jul 2022 08:42:52 -0400
Message-ID: <2240967.1658839372@sss.pgh.pa.us> (raw)
In-Reply-To: <PH0PR11MB51919A15ED33C356120145F7D6949@PH0PR11MB5191.namprd11.prod.outlook.com>
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	<CAB_5SRdsCDx8Mq974S=WxWBG+vSD7axZVtAoTvMvzQ+6ghffuA@mail.gmail.com>
	<PH0PR11MB51919A15ED33C356120145F7D6949@PH0PR11MB5191.namprd11.prod.outlook.com>

"James Pang (chaolpan)" <chaolpan@cisco.com> writes:
> How to make it fast ?  These are our steps about copy large data from Oracle to Postgres
>   1.  Create table in Postgres  2. Extract data from Oracle to CSV  3. Alter table set xxx unlogged,   4. Run copy command into Postgres db  5. Alter table set xxx logged  6. Create index …

The easy answer is to skip steps 3 and 5.

			regards, tom lane





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