Package: postgresql-18-pg-checksums Source: pg-checksums Version: 1.3-2.pgdg22.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 103 Depends: postgresql-18, libc6 (>= 2.34) Recommends: pg-checksums-doc Homepage: https://github.com/credativ/pg_checksums Priority: optional Section: database Filename: pool/main/p/pg-checksums/postgresql-18-pg-checksums_1.3-2.pgdg22.04+1_amd64.deb Size: 38804 SHA256: 19a1a2d0468843e23e480d7b54abcecbabf1c9c0016a781a8a952809299ebae5 SHA1: e891824ea41b6e846b20a7af962181039342df6c MD5sum: f2dbb49e9e8f42e59e4422a43d7ad627 Description: Activate/deactivate/verify PostgreSQL data checksums Data checksums allow the PostgreSQL database server to identify I/O failures when reading data from storage. The checksums stored in the page header of each data page are compared to the computed checksum of the read data. . Data checksums need to be activated at instance creation time, all current versions of PostgreSQL including v11 do not allow activating (or deactivating) checksums afterwards. . pg_checksums_ext can activate or deactivate data checksums as long at the database cluster is shutdown cleanly. Activating checksums requires all database blocks to be read and all page headers to be updated, so can take a long time on a large database. Deactivating checksums only requires the cluster control file to be updated so is quick. . In addition, pg_checksums_ext can verify the checksums in an online cluster.