Package: postgresql-14-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-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.pgdg20.04+1_amd64.deb Size: 35772 SHA256: 1a2c611bf0f5845cb0d25d43de68af711533b176c40f11a492bf059428ac174f SHA1: 0a16e35bd1f74e16d205df4d4d87e7642394d056 MD5sum: eb217a72fbc6a154505d870db2950cde 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.