Package: postgresql-15-pg-checksums Source: pg-checksums Version: 1.2-2.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_1.2-2.pgdg20.04+1_amd64.deb Size: 36188 SHA256: a97ea9925ac6ca723df473d91a1b3ff49dca512e89b216c035fbb1c9c182067a SHA1: 4740b67e94432cd23cd4c9439cc2091adb19419d MD5sum: 6c7f3b259b6a97e6e317472b0dc7fc12 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.