On Wed, Sep 10, 2025 at 10:13 AM Jonathan S. Katz <[email protected]> wrote:
> PostgreSQL 18 also supports using x86 AVX-512 instructions for CRC32 > calculations, which are used in page checksums and are also available in the > new > [`crc32`](https://www.postgresql.org/docs/18/functions-binarystring.html#FUNCTIONS-BINARYSTRING-OTHER) > function. Hi Jon, The checksum stored in the page header is not actually a CRC but something else entirely. WAL records are a convenient example of something that uses CRC. Also, CRC32 is not hardware accelerated, only CRC32C is. We have two SQL-callable functions. To avoid confusion maybe they can be omitted from this longer-than-usual announcement -- they seem like a niche feature anyway. -- John Naylor Amazon Web Services
