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E.11. Postgres Pro Standard 15.2.1
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E.11. Postgres Pro Standard 15.2.1

E.11.1. Overview
E.11.2. Migration to Version 15.2.1

Release Date: 2023-02-22

E.11.1. Overview

This release is based on PostgreSQL 15.2 and Postgres Pro Standard 15.1.1. All improvements inherited from PostgreSQL 15.2 are listed in PostgreSQL 15.2 Release Notes. Other major changes and enhancements are as follows:

  • Added support for ROSA COBALT Server 7.9 and ended support for ROSA COBALT Server 7.3.

  • Fixed suboptimal memory usage in optimizing a query that included a pretty large number of UNION ALL subqueries. This planner issue was due to a vanilla PostgreSQL issue with replacing placeholder variables in a special case of flattening UNION ALL leaf queries.

  • Upgraded aqo to version 1.6, which provides the following new features:

    • Introduced smart statement timeout, which is needed to limit the execution time when manually training aqo on special queries with a poor cardinality forecast and which aqo can dynamically change during this training.

    • Added aqo_query_stat_update, aqo_data_update and aqo_query_texts_update functions to update or insert a record in data files underlying the respective view.

    • Added aqo_memory_usage function to display the memory size required for aqo.

    • Renamed aqo_enable_query and aqo_disable_query functions to aqo_enable_class and aqo_disable_class, respectively.

  • Upgraded pg_probackup to version 2.6, which provides the following new features and optimizations:

    • Optimized pg_probackup input/output engine to improve performance.

    • Added support for lz4 and zstd compression algorithms.

    • Ended support for Postgres Pro 9.6.

  • Upgraded pgbouncer to version 1.18.

  • Upgraded pgpro_stats to version 1.5, which provides new features and bugfixes:

    • Added computation of statistics on removal of all-frozen and all-visible marks in the visibility map.

    • Added the pgpro_stats_vacuum_database view, showing statistics about vacuuming each database in a cluster.

    • Fixed possible crash of a server where pgpro_stats.track was set to all that could occur when pgpro_stats processed a function body as a multistatement query.

    • Fixed inappropriate issuing of an “unrecognized expression node type: ...” warning in case a query plan contained a GatherMerge node.

    • Fixed too long execution of a query containing texts of JSON or XML documents of a special kind. The slowdown was possible because normalization of the query plan text could mistakenly include replacement of constants inside those documents.

  • Upgraded the PLV8 extension to version 3.1.5.

E.11.2. Migration to Version 15.2.1

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.

To migrate from PostgreSQL or a Postgres Pro Standard release based on a previous PostgreSQL major version, see the instructions in Postgres Pro Standard 15.0.1 Release Notes.

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