Package: postgresql-13-pg-checksums Source: pg-checksums Version: 1.1-6.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_1.1-6.pgdg22.04+1_amd64.deb Size: 35944 SHA256: 1ea68d83578b720f5411f793a37cf8b431262a472c5ead2f581f5d9efbf32552 SHA1: cb3d0f416c84dda27205322d4be4f4867130a225 MD5sum: 5f9f9ad521939893e2380d3df6822fb6 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.