Package: postgresql-10-pg-checksums Source: pg-checksums Version: 1.1-7.pgdg20.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 75 Depends: libc6 (>= 2.17), postgresql-10 Recommends: pg-checksums-doc Homepage: https://github.com/credativ/pg_checksums Priority: optional Section: database Filename: pool/main/p/pg-checksums/postgresql-10-pg-checksums_1.1-7.pgdg20.04+1_amd64.deb Size: 30908 SHA256: 645f9a144e0dfa48126cf4e8bd6bdb3b4293ae3a638a8feb9e21eefab8cf4353 SHA1: 65edb95153f231beb0adfcdc34324f1ace8ab8d1 MD5sum: 972b22daae4a4581fddf3620d0dd4a2f 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.