On 2018-Aug-22, Andres Freund wrote:
> On 2018-08-22 11:06:17 -0300, Alvaro Herrera wrote:
> > I suppose that the use case that was initially proposed (ZFS) has not
> > yet been tested so we shouldn't reject this patch immediately, but
> > perhaps what Joyent people should be doing now is running Tomas' test
> > script on ZFS and see what the results look like.
>
> IDK, I would see it less negatively. Yes, we should put a BIG FAT
> warning to never use this on non COW filesystems. And IMO ZFS (and also
> btrfs) sucks badly here, even though they really shouldn't. But given
> the positive impact for zfs & btrfs, and the low code complexity, I
> think it's not insane to provide this tunable.
Yeah, but let's see some ZFS numbers first :-)
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services