Package: postgresql-13-pg-checksums Source: pg-checksums Version: 1.2-2.pgdg20.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 89 Depends: libc6 (>= 2.17), postgresql-13 Recommends: pg-checksums-doc Homepage: https://github.com/credativ/pg_checksums Priority: optional Section: database Filename: pool/main/p/pg-checksums/postgresql-13-pg-checksums_1.2-2.pgdg20.04+1_amd64.deb Size: 35828 SHA256: 50369b6f92b02908dc34e41c377b924f49bc5c8b10862503a28089aae9eb3e22 SHA1: 7e8260dbe2d380c9872b4d9b858f75cdec1f7d83 MD5sum: c12f843ba6d37c219376c6cd76a34cc0 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.