On Tue, Feb 15, 2022 at 06:24:13PM -0800, Andres Freund wrote: > For backups it's pretty obviously zstd imo. At the lower levels it achieves > considerably higher compression ratios while still being vastly faster than > gzip. Without even using the threaded compression support the library has.
Noted. > For something like wal_compression it'd be a harder question. FWIW, I have done some measurements for wal_compression with zstd, as of: https://www.postgresql.org/message-id/YMmlvyVyAFlxZ+/h...@paquier.xyz The result is not surprising, a bit more CPU for zstd with more compression compared to LZ4, both outclassing easily zlib. I am not sure which one would be more adapted as default as FPI patterns depend on the workload, for one, and this is just one corner case. -- Michael
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