Re: zero_damaged_pages doesn't work

David Boreham wrote:
> On 9/27/2010 4:53 PM, Tom Lane wrote:
> > The reason it tells you that data will be destroyed is that that could
> > very well happen.
>
> Re-parsing this, I think there was a mis-communication :
>
> I'm not at all suggesting that the doc should _not_ say that data will
> be corrupted.
> I'm suggesting that in addition to what it currently says, it also
> should say that the on-disk data won't be
> changed by the page zeroing mode.
>
> In my searching I found countless people over the past few years who had
> been similarly confused into believing that it would write back the
> zeroed page
> to disk.

Based on this discussion from September, I have applied the attached
documentation patch to clarify that zero_damaged_pages are not forced to
disk, and when to set this parameter off again.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ It's impossible for everything to be true. +