E.9. Postgres Pro Enterprise 10.18.1
Release date: 2021-09-08
E.9.1. Overview
This release is based on PostgreSQL 10.18 and Postgres Pro Enterprise 10.17.1. All changes inherited from PostgreSQL 10.18 are listed in PostgreSQL 10.18 Release Notes. Other major changes and enhancements are as follows:
Fixed an issue with handling posting list pages in GIN indexes after upgrading Postgres Pro Enterprise to the current major version. This issue could lead to GIN index corruption that manifested itself in “ERROR: XX000: tuple offset out of range” errors on stand-by servers.
Upgraded mamonsu to version 3.0, which is incompatible with the previous one. Read mamonsu Compatibility Considerations to learn what you need to do to continue using the application.
Fixed an issue with pgpro_scheduler that could result in a failure to stop a stand-by server, e.g. with
pg_ctl.Added support for Astra Linux Smolensk 1.7.
Fixed the behavior of
ALTER TABLE IF EXISTScommand in the case when the source table is missing and the pg_pathman extension was loaded. Previously,tableRENAME TOtable1ERRORwas returned, and nowNOTICEis generated, which is how Postgres Pro behaves with no pg_pathman extension loaded.Upgraded pg_probackup to version 2.5.1, which added a new
catchupcommand to copy a Postgres Pro instance directly, without using the backup catalog. This allows you to add a new standby server in a parallel mode or to have a fallen-behind standby server “catch up” with master.Fixed a bug in the query optimizer, which overestimated the cost of index scan using a unique index. This behavior was observed when between index scans using a unique index and using a non-unique one, the non-unique index was chosen, which resulted in excessive disk accesses and a considerable overall slowdown.
Implemented I/O buffering in CFS, which can improve performance on HDD.
E.9.2. Migration to Version 10.18.1
If you are upgrading from a Postgres Pro Enterprise release based on the same PostgreSQL major version, it is enough to install the new version into your current installation directory.
Important
If you have previously migrated to Postgres Pro Enterprise 10.17.1 or lower, you must run the REINDEX command to rebuild GIN indexes.
While functions numeric_eq, numeric_ne, numeric_gt, numeric_ge, numeric_lt, and numeric_le are actually leakproof, they were not marked as such in Postgres Pro Enterprise 10.11.1 or lower, which could lead to incorrect query optimization. In particular, it negatively affected query execution if row-level security policy was in use. Version 10.12.1 repairs this issue for new installations by correcting the initial catalog data, but existing installations will still have incorrect markings unless you update pg_proc entries for these functions. You can run pg_upgrade to upgrade your server instance to a version containing the corrected initial data, or manually correct these entries in each database of the installation using the ALTER FUNCTION command. For example:
ALTER FUNCTION pg_catalog.numeric_eq LEAKPROOF
Starting from Postgres Pro Enterprise 10.11.1, the ICU library upgrade does not interfere with the server start. Before connecting to a database using ICU as the default collation, Postgres Pro compares this collation version to the one provided by the ICU library and displays a warning if the collation versions do not match; you may need to rebuild the objects that depend on the default collation if you think the collation change may affect the sort order of your data. To suppress these warnings, you can use the ALTER COLLATION "default" REFRESH VERSION command, as explained in ALTER COLLATION.
When upgrading from versions 10.6.2 or lower, you must run the REINDEX command to rebuild GIN, GiST, and SP-GiST indexes to fix replication issues that could be observed in these versions. You should also retake all backups for these versions if your database had such indexes.
When upgrading from versions 10.3.3 or lower, you have to rebuild GiST indexes built over columns of the intarray type, as well as indexes that use mchar or mvarchar types.
To migrate from PostgreSQL, as well as Postgres Pro Standard or Postgres Pro Enterprise based on a previous PostgreSQL major version, see the migration instructions for version 10. If you are opting for a dump/restore, make sure to use the --add-collprovider option to correctly choose the provider for the default collation of the migrated database.