Re: Different compression methods for FPI

[Andrey Borodin]

> 16 июня 2021 г., в 12:18, Michael Paquier <mich...@paquier.xyz> написал(а):
>  Among the
> remaining two I would be tempted to choose LZ4.  That's consistent
> with what toast can use now.

I agree that allowing just lz4 - is already a huge step ahead.
But I'd suggest supporting zstd as well. Currently we only compress 8Kb chunks 
and zstd had no runaway to fully unwrap it's potential.
In WAL-G we observed ~3x improvement in network utilisation when switched from 
lz4 to zstd in WAL archive compression.

BTW we could get rid of whole hole-in-a-page thing if we would set lz4 as 
default. This could simplify FPI code.

Thanks!

Best regards, Andrey Borodin.