Re: [GSoC2014] Patch ALTER TABLE ... SET LOGGED

On Wed, Jul 16, 2014 at 3:53 PM, Andres Freund <andres(at)2ndquadrant(dot)com>
wrote:
>
> On 2014-07-16 20:25:42 +0200, Andres Freund wrote:
> > Hi,
> >
> > I quickly looked at this patch and I think there's major missing pieces
> > around buffer management and wal logging.
> >
> > a) Currently buffers that are in memory marked as
> > permanent/non-permanent aren't forced out to disk/pruned from cache,
> > not even when they're dirty.
> > b) When converting from a unlogged to a logged table the relation needs
> > to be fsynced.
> > c) Currently a unlogged table changed into a logged one will be
> > corrupted on a standby because its contents won't ever be WAL logged.
>
> Forget that, didn't notice that you're setting tab->rewrite = true.
>

:-)

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