Package: postgresql-11-pg-checksums Source: pg-checksums Version: 1.2-2.pgdg20.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 71 Depends: libc6 (>= 2.17), postgresql-11 Recommends: pg-checksums-doc Homepage: https://github.com/credativ/pg_checksums Priority: optional Section: database Filename: pool/main/p/pg-checksums/postgresql-11-pg-checksums_1.2-2.pgdg20.04+1_amd64.deb Size: 30644 SHA256: 9353703c01d37aaaad1a1d94dd2d9128f5f931c81bb4314dc3ce15677d2c6ebf SHA1: 77ac699afc4bdf8edc771912aa7fd81d96c411d5 MD5sum: 5ca09a8a921a29133e3b36dda58e0c88 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.