In Postgres 17 doc, for wal_compression parameter it's written:
"Turning this parameter on can reduce the WAL volume without increasing the risk of unrecoverable data corruption"
If wal_compression = on then when a full page is written in the wal, it will be compressed. What I do not understand is that the wal file keeps the same size 16Mb. What is the interest to activate wal_compression?
If wal_compression = on then when a full page is written in the wal, it will be compressed. What I do not understand is that the wal file keeps the same size 16Mb. What is the interest to activate wal_compression?
Thanks in advance for explanation
Fabrice
