It turns out that we are using TDE (which I knew, but I assumed pg_waldump was decrypting - bad assumption). It took a few tries, but I finally figured out how to get pg_waldump to work with the decrypt flags.
On Mon, 2024-06-10 at 13:41 -0500, Charles Schultz wrote: > On Wed, May 29, 2024 at 10:05 AM Laurenz Albe <laurenz.albe@cybertec.at> wrote: > > Did you compress the files? If yes, you have to uncompress them before feeding them > > to "pg_waldump". > > We do use compression (wal_compression="on"), which looks to default to pglz. > How might I decompress them? I tried gunzip in several iterations, but no dice.
That will compress full-page images *within* the WAL segment, but not the file itself. The file should still have the regular size.