Re: 16-bit page checksums for 9.2

On 06.01.2012 20:26, Simon Riggs wrote:
> The following patch (v4) introduces a new WAL record type that writes
> backup blocks for the first hint on a block in any checkpoint that has
> not previously been changed. IMHO this fixes the torn page problem
> correctly, though at some additional loss of performance but not the
> total catastrophe some people had imagined. Specifically we don't need
> to log anywhere near 100% of hint bit settings, much more like 20-30%
> (estimated not measured).

How's that going to work during recovery? Like in hot standby.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com