Package: pg-checksums-doc Source: pg-checksums Version: 1.1-6.pgdg20.04+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_1.1-6.pgdg20.04+1_all.deb Size: 7252 SHA256: c7509dd8b334d1448205a34e4b99d025f346ab94ae6630233e41a3a1b6ce93d3 SHA1: 2639655ef01863dc35a09f49338cecf872685511 MD5sum: c95b1e1b5c8f077824d5f24dc5a40fbb 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.