Re: Will modifications to unlogged tables also be flused to disk? - Mailing list pgsql-general

From Jeff Janes
Subject Re: Will modifications to unlogged tables also be flused to disk?
Date
Msg-id CAMkU=1xc2NAJD192QfkQj3sn+gtzXtp-7UoziKimNp0tWBNKoQ@mail.gmail.com
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In response to Re: Will modifications to unlogged tables also be flused to disk?  (frank <halldu0815@gmail.com>)
List pgsql-general

On Mon, Dec 8, 2014 at 4:43 AM, frank <halldu0815@gmail.com> wrote:
Jeff Janes wrote
> That's not really true.  There are no per-row WAL records.  There is still
> a per-transaction WAL record, the commit record. If you only care about
> the
> timing of the WAL and not the volume, changing to unlogged will not make a
> difference.  (These commit-only records are automatically dealt with
> asynchronously, even if synchronous-commit is on.)
>
> Cheers,
>
> Jeff

Hi,

just to understand this answer:

Is it *NOT* possible to create an unlogged table where inserts or updates
will *NOT* modify the WAL files?


Correct.  
 

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