Package: pg-checksums-doc Source: pg-checksums Version: 1.2-2.pgdg22.04+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_1.2-2.pgdg22.04+1_all.deb Size: 7348 SHA256: 8dee813b8b3906d4c9dbd2fd4614bf51335677ddc17842d32a246cc1fbbf7f59 SHA1: 507b4441aaf0de595be7f517900a84d8f9712b3a MD5sum: dab4eca52aa33bb64aa78b1e767b4801 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.