E.16. Postgres Pro Standard 12.10.1
Release Date: 2022-02-24
E.16.1. Overview
This release is based on PostgreSQL 12.10 and Postgres Pro Standard 12.9.1. All improvements inherited from PostgreSQL 12.10 are listed in PostgreSQL 12.10 Release Notes. Other major changes and enhancements are as follows:
Increased the number of partitions of the shared buffer mapping hash table to 1024, which can improve performance on multi-core systems.
Fixed the use of multi-column statistics by planner. Previously, when the optimizer estimated the query selectivity using multi-column statistics and the query conditions only included part of the columns involved, the cardinality could be considerably overestimated, so the created plan would be non-optimal.
Fixed the out-of-memory (OOM) killer settings in system startup files. Previously the OOM score adjustment value was set for all Postgres Pro processes rather than for postmaster only, so when Postgres Pro exhausted all RAM, the OOM killer could start killing irrelevant processes, such as sshd.
Added support for Rocky Linux 8.
Ended support for outdated operating systems Debian 8, Astra Linux Smolensk 1.5 and MSVSphere 6.3.
Upgraded pg_probackup to version 2.5.5, which provides the following new features and bugfixes as compared to the previous included version 2.5.3:
Added the
--checkuniqueoption to thecheckdbcommand to work together with--amcheckand verify unique constraints during logical verification of indexes when the amcheck extension is installed in the database and its version supports the verification of unique constraints. Check the amcheck documentation for whether this verification is supported.Fixed an issue that could occur when the source database was not on the timeline 1 and the destination database did not fall behind: probackup sanity checks on
catchuptimeline history failed with the error “Destination is not in source timeline history”.Fixed the behavior of
catchupinDELTAandPTRACKmodes. The fixed issue could occur when pg_probackup operated remotely via SSH and--destination-pgdatawas the same as--source-pgdata, caused corruption of the source instance (at least theglobal/pg_control,global/pg_filenode.mapandbase/*/pg_filenode.mapfiles got deleted) and resulted in the error “Could not open file "/pgwal/test/global/pg_control" for reading: No such file or directory”.
E.16.2. Migration to Version 12.10.1
If you are upgrading from Postgres Pro Standard based on the same PostgreSQL major version, it is enough to install the new version into your current installation directory.
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 Standard 12.1.1, which could lead to incorrect query optimization. In particular, it negatively affected query execution if row-level security policy was in use. Version 12.2.1 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
When upgrading from Postgres Pro versions 12.6.1 or lower, rebuild indexes containing at least one included column of type for which the collation was defined in the table.
If you are upgrading from Postgres Pro versions 12.6.2 or lower and take PTRACK backups using pg_probackup, retake a full backup after upgrade.