On Apr18, 2013, at 19:04 , Jeff Davis <pgsql@j-davis.com> wrote:
> On Wed, 2013-04-17 at 20:21 -0400, Greg Smith wrote:
>> -Original checksum feature used Fletcher checksums. Its main problems,
>> to quote wikipedia, include that it "cannot distinguish between blocks
>> of all 0 bits and blocks of all 1 bits".
>
> That is fairly easy to fix by using a different modulus: 251 vs 255.
At the expense of a drastic performance hit though, no? Modulus operations
aren't exactly cheap.
best regards,
Florian Pflug
