RE: why select count(*) consumes wal logs

["Kumar, Virendra" <Virendra.Kumar@xxxxxxxxxxx>]

I concord.

Why VACUUM when there is no update or deletes.

 

Regards,

Virendra

 

From: Ron [mailto:ronljohnsonjr@xxxxxxxxx]
Sent: Tuesday, November 06, 2018 12:20 PM
To: pgsql-general@xxxxxxxxxxxxxxxxxxxx
Subject: Re: why select count(*) consumes wal logs

 

On 11/06/2018 11:12 AM, Michael Nolan wrote:

On Tue, Nov 6, 2018 at 11:08 AM Ravi Krishna <srkrishna1@xxxxxxx> wrote:

PG 10.5

I loaded 133 million rows to a wide table (more than 100 cols) via COPY.

 

It's always a good idea after doing a large scale data load to do a vacuum analyze on the table (or the entire database.)

 

I understand the need to ANALYZE (populate the histograms needed by the dynamic optimizer), but why VACUUM (which is recommended after updates and deletes).

Thanks

--
Angular momentum makes the world go 'round.

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