Package: postgresql-13-pg-checksums Source: pg-checksums Version: 1.2-2.pgdg22.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 89 Depends: libc6 (>= 2.34), postgresql-13 Recommends: pg-checksums-doc Homepage: https://github.com/credativ/pg_checksums Priority: optional Section: database Filename: pool/main/p/pg-checksums/postgresql-13-pg-checksums_1.2-2.pgdg22.04+1_amd64.deb Size: 35760 SHA256: 7da39ca881263635db214f9129024340cf09da1bc95fd2baa78d32653e84ac1e SHA1: 0754fac6977d4fcbfc3fb214c00d48f742d761e7 MD5sum: 84ab0a0f5357bf22422464b00ffbc1c0 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.