Thanks for benchmarks, Justin!
> 14 июня 2021 г., в 06:24, Justin Pryzby <pry...@telsasoft.com> написал(а): > > The GUC is PGC_USERSET Oh, wow, that's neat. I did not realize that we can tune this for each individual client connection. Cool! > pglz writes ~half as much, but takes twice as long as uncompressed: > |Time: 3362.912 ms (00:03.363) > |wal_bytes | 11644224 > > zlib writes ~4x less than ncompressed, and still much faster than pglz > |Time: 2167.474 ms (00:02.167) > |wal_bytes | 5611653 > > lz4 is as fast as uncompressed, and writes a bit more than pglz: > |Time: 1612.874 ms (00:01.613) > |wal_bytes | 12397123 > > zstd(6) is slower than lz4, but compresses better than anything but zlib. > |Time: 1808.881 ms (00:01.809) > |wal_bytes | 6395993 I was wrong about zlib: it has its point on Pareto frontier. At least for this test. Thanks! Best regards, Andrey Borodin.
