| From: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
|---|---|
| To: | Pavan Teja <pavan(dot)postgresdba(at)gmail(dot)com> |
| Cc: | Claudio Freire <klaussfreire(at)gmail(dot)com>, postgres performance list <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: 8.2 Autovacuum BUG ? |
| Date: | 2018-01-24 14:57:16 |
| Message-ID: | CAKFQuwaSdBWYKmv=buPEyR8rWFnucX5xEbNv3n5fuhtF=nSMHA@mail.gmail.com |
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| Lists: | pgsql-performance |
On Wed, Jan 24, 2018 at 7:48 AM, Pavan Teja <pavan(dot)postgresdba(at)gmail(dot)com>
wrote:
>
>
> Yes, but why doing vacuum freeze of a table is causing a rapid
> archiving??
> Any idea??
>
>
IIUC Freezing involves physically altering those pages that are not frozen
to make them frozen. Those changes are logged just like any (most?) other
physical changes to pages. The rapid-ness is because freezing is not that
difficult so lots of pages can be changed in a relatively short period of
time.
David J.
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