Package: postgresql-15-pg-checksums Source: pg-checksums Version: 1.1-6.pgdg20.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 87 Depends: libc6 (>= 2.17), postgresql-15 Recommends: pg-checksums-doc Homepage: https://github.com/credativ/pg_checksums Priority: optional Section: database Filename: pool/main/p/pg-checksums/postgresql-15-pg-checksums_1.1-6.pgdg20.04+1_amd64.deb Size: 36400 SHA256: e50df94e323971a53acd1b0cc69036adb947155c2ffcd1dbbfc546d0d78998ea SHA1: 44253903028d389e0b7b1e8d3c916230d37030a0 MD5sum: 01c4f3e11b7de6d15013b47a8cccd9d1 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.