Re: [HACKERS] Checksums by default?

On 01/21/2017 04:18 PM, Petr Jelinek wrote:
> On 21/01/17 11:39, Magnus Hagander wrote:
>> Is it time to enable checksums by default, and give initdb a switch to
>> turn it off instead?
>
> I'd like to see benchmark first, both in terms of CPU and in terms of
> produced WAL (=network traffic) given that it turns on logging of hint bits.
>

... and those hint bits may easily trigger full-page writes, resulting 
in significant write amplification.

regards

-- 
Tomas Vondra                  http://www.2ndQuadrant.com
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