Package: postgresql-11-pg-checksums Source: pg-checksums Version: 1.1-6.pgdg22.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 75 Depends: libc6 (>= 2.34), postgresql-11 Recommends: pg-checksums-doc Homepage: https://github.com/credativ/pg_checksums Priority: optional Section: database Filename: pool/main/p/pg-checksums/postgresql-11-pg-checksums_1.1-6.pgdg22.04+1_amd64.deb Size: 30680 SHA256: f8b439c179f69588c248a27a0cbc101ae0d2560f8e127c047fc64c579925314a SHA1: dbe93a285364bb03043f41d826d758a6d8a88f98 MD5sum: b5ebf49f1492e5590594784040347c79 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.