Package: pg-checksums-doc Source: pg-checksums Version: 1.1-4.pgdg18.04+1 Architecture: all Maintainer: Debian PostgreSQL Maintainers Installed-Size: 16 Multi-Arch: foreign Homepage: https://github.com/credativ/pg_checksums Priority: optional Section: doc Filename: pool/main/p/pg-checksums/pg-checksums-doc_1.1-4.pgdg18.04+1_all.deb Size: 7144 SHA256: 377d439f1eb15b7c4f6462ac7c4e868929672c93e5b84289540ebc492bd81613 SHA1: d1cbb58e5c57a862d6dad8befcc9e59b1c1753e5 MD5sum: 8f64770d71e02b4a7d638d9e1cdeea68 Description: Activate/deactivate/verify PostgreSQL data checksums (Documentation) 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. . This package contains the manpage.