Package: postgresql-14-pg-checksums Source: pg-checksums Version: 1.2-2.pgdg22.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 89 Depends: libc6 (>= 2.34), postgresql-14 Recommends: pg-checksums-doc Homepage: https://github.com/credativ/pg_checksums Priority: optional Section: database Filename: pool/main/p/pg-checksums/postgresql-14-pg-checksums_1.2-2.pgdg22.04+1_amd64.deb Size: 35732 SHA256: 5a13600210efd1bf534bb590c319ef1d1d215044a316f30cddb0fb85b893842b SHA1: d6574bcebbb5b34a9b1ebc0b5dbbe15cb09e69e8 MD5sum: fc30ff9ef08629459be7515c45f0f9fd 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.