Package: pg-checksums-doc Source: pg-checksums Version: 1.4-1.pgdg22.04+2 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_1.4-1.pgdg22.04+2_all.deb Size: 7436 SHA512: 52e508191dad8d0415109ee0c83a446eb5a8eb6bc92c84f4ef5f9b8e7dded993606aea7aa2c0d324f901779815d8fa79f7c32e66a43cdb0bb6069b804628858f SHA256: 5e486e09146174933a491a67979823e24be92e544b022fbbb422a135c94e6bcb SHA1: 9fadf3ce8a46f9dc54e1154e698a7b25904591c0 MD5sum: 841167caf1b8a54414d7447105d3c74e 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.