# Percona Distribution for PostgreSQL 13.5 (2021-11-23)

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      <th class="field-name">Date:</th>
      <td class="field-body">November 23, 2021</td>
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      <th class="field-name">Installation:</th>
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        <a class="reference external" href="https://www.percona.com/doc/postgresql/13/installing.html#">Installing Percona Distribution for PostgreSQL</a></td>
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Percona Distribution for PostgreSQL is a collection of tools to assist you in managing PostgreSQL. Percona Distribution for PostgreSQL
installs PostgreSQL and complements it by a selection of extensions that
enable solving essential practical tasks efficiently.

This release of Percona Distribution for PostgreSQL is based on [PostgreSQL 13.5](https://www.postgresql.org/docs/13/release-13-5.html).

The following is the list of extensions available in Percona Distribution for PostgreSQL.

| Extension           | Version        | Description                  |
| ------------------- | -------------- | ---------------------------- |
| [Patroni](https://patroni.readthedocs.io/en/latest/) | 2.1.1 | a HA (High Availability) solution for PostgreSQL |
| [Pgaudit](https://www.pgaudit.org/)             | 1.5.0   | provides detailed session or object audit logging via the standard logging facility provided by PostgreSQL                |
|[`pgAudit set user`](https://github.com/pgaudit/set_user)| 3.0.0|  provides an additional layer of logging and control when unprivileged users must escalate themselves to superuser or object owner roles in order to perform needed maintenance tasks.|
| [pgBackRest](https://pgbackrest.org/)           | 2.36    | a backup and restore solution for PostgreSQL       |
|[`pgBadger`](https://github.com/darold/pgbadger) | 11.6       | a fast PostgreSQL Log Analyzer.|
|[`pgBouncer`](https://www.pgbouncer.org/) | 1.16.1 | lightweight connection pooler for PostgreSQL|
| [pg_repack](https://github.com/reorg/pg_repack) | 1.4.7   | rebuilds PostgreSQL database objects           |
| [pg_stat_monitor](https://github.com/percona/pg_stat_monitor)| 1.0.0 - Beta2 | collects and aggregates statistics for PostgreSQL and provides histogram information.       |
| [PostgreSQL Common](https://packages.debian.org/sid/percona-postgresql-common)| 230 | PostgreSQL database-cluster manager. It provides a structure under which multiple versions of PostgreSQL may be installed and/or multiple clusters maintained at one time.|
|[`wal2json`](https://github.com/eulerto/wal2json) |2.4        | a PostgreSQL logical decoding JSON output plugin.|

Percona Distribution for PostgreSQL also includes the following packages:
- `llvm` 12.0.1 packages for Red Hat Enterprise Linux 8 / CentOS 8. These fix compatibility issues with LLVM from upstream. 
- supplemental ETCD packages which can be used for setting up Patroni clusters. These packages are available for the following operating systems:

|  Operating System   |Package               | Version | Description        |
| ------------------- | ---------------------| --------| -------------------|
| CentOS 7            |`python3-python-etcd` | 0.4.3   | A Python client for ETCD     |
| CentOS 8            | `etcd`               | 3.3.11  | A consistent, distributed key-value store|
|                     | `python3-python-etcd`| 0.4.3   | A Python client for ETCD     |
| Debian 9 ('stretch')| `etcd`               | 3.3.11  |A consistent, distributed key-value store|
|                     | `python3-etcd`       | 0.4.3   | A Python client for ETCD     |

                                                      
Percona Distribution for PostgreSQL is also shipped with the [libpq](https://www.postgresql.org/docs/13/libpq.html) library. It contains "a set of
library functions that allow client programs to pass queries to the PostgreSQL
backend server and to receive the results of these queries."