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PG-1801 - Add 18.1.1 release notes (#881)
This PR adds the release notes for 18.1 which includes not only the GA but the package separation notes for pg_tde 2.1 and many more fixes.
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‎docs/major-upgrade.md‎

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The exact steps may differ depending on the package manager of your operating system.
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!!! note
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`pg_tde` is **not** a dependency in PostgreSQL 18. If your PostgreSQL 17 cluster uses `pg_tde`, you must install the `pg_tde` package **before** starting the upgraded server.
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If the package is missing, PostgreSQL 18 will fail to start because the required `pg_tde` shared library is not available.
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## On Debian and Ubuntu using `apt`
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Run **all** commands as root or via **sudo**:

‎docs/release-notes/release-notes-v18.1.1.md‎

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--8<-- "release-notes-intro.md"
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This release of Percona Distribution for PostgreSQL is based on Percona Server for PostgreSQL 18.1.1 - a binary compatible, open source drop in replacement of [PostgreSQL Community 18.1](https://www.postgresql.org/docs/18/release-18.html).
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This release of Percona Distribution for PostgreSQL is based on Percona Server for PostgreSQL 18.1.1 - a binary compatible, open source drop in replacement of [PostgreSQL Community 18.1](https://www.postgresql.org/docs/18/release-18-1.html).
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It introduces several major enhancements, such as:
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- **Parallel logical replication** for improved throughput during initial data synchronization
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- **Faster in-place upgrades** via `pg_upgrade` performance improvements
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- **Enhanced monitoring** with new statistics views for `pg_stat_io` and background writer activity
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- **Security improvements**, including expanded SSL/TLS configuration options
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- **Performance optimizations** for query execution and index management
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- Added support for **asynchronous I/O (AIO)** with PostgreSQL 18.1.1 which is now the default I/O mechanism.
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These features make PostgreSQL 18 a major step forward in scalability, observability, and operational efficiency.
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## Release Highlights
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### SBOMs available for download
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This release continues to deliver Percona’s open source value-add components for enterprise use cases, including `pg_stat_monitor` 2.3.1 for advanced query-level observability, `pg_tde` 2.1 for Transparent Data Encryption and more. See the full component list below for details.
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!!! note
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To upgrade from earlier versions (e.g. Percona Distribution for PostgreSQL 17.x), follow the steps in [Upgrading Percona Distribution for PostgreSQL](../major-upgrade.md).
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### `pg_tde` is now a standalone package
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Percona now provides Software Bill of Materials (SBOMs) to support compliance and security audits. SBOM files are available for tarball builds.
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Starting with PostgreSQL 18, `pg_tde` is no longer shipped with the server package. If your cluster relies on `pg_tde`, you must install the package manually.
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See [Software Bill of Materials (SBOMs)](../sboms.md) for the full list.
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For more information on installing `pg_tde`, see [Install pg_tde :octicons-link-external-16:](https://docs.percona.com/pg-tde/install.html).
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### Tarball updates
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The binary tarballs for x86_64 and ARM64 architectures have been updated in this release. The following libraries and components have new versions:
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- LIBXSLT: 1.1.43
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- LUA: 5.3.6
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- LIBTIFF: 4.7.0
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- EXPAT: 2.5.0
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- PGPOOL: 4.6.2
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- PGBACKREST: 2.56.0
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- PATRONI: 4.0.6
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- pgbouncer: 1.25.0
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- pgpool2: 4.6.3
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- etcd: 3.5.24
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- PostGIS: 3.5.4
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- set_user: 4.2.0
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- pg_repack: 1.5.3
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- pg_stat_monitor: 2.3.1
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- pgBackRest: 2.57.0
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- Patroni: 4.1.0
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- HAProxy: 2.8.16
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- pgvector: 0.8.1
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- libxml2: 2.12.10
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- pg_tde: 2.1.0
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See [Install Percona Distribution for PostgreSQL from binary tarballs](../tarball.md) for the download links.
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### Addressed CVEs
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This release includes important security measures that address the following CVEs: TBA. For more details, see the [PostgreSQL 18.1 release notes](https://www.postgresql.org/docs/release/18.0/).
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This release includes important security measures that address the following CVEs: CVE-2025-12817, CVE-2025-12818. For more details, see the [PostgreSQL 18.1 release notes](https://www.postgresql.org/docs/18/release-18-1.html).
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## Known Issue
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## Known Issues
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### For minor & major upgrades (RHEL only)
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To resolve this, remove the `percona-postgresql-common-dev` package and reinstall it with the new intended upgraded PPG/PSP server.
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## MD5 Authentication Deprecated
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The md5 password authentication is deprecated now and will be removed in a future release.
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## Supplied third-party extensions
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Review each extension’s release notes for What’s new, improvements, or bug fixes.
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The following is the list of extensions available in Percona Distribution for PostgreSQL.
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| Extension | Version | Description |
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| [etcd :octicons-link-external-16:](https://etcd.io/) | 3.5.21 | A distributed, reliable key-value store for setting up highly available Patroni clusters |
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| [etcd :octicons-link-external-16:](https://etcd.io/) | 3.5.24 | A distributed, reliable key-value store for setting up highly available Patroni clusters |
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| [python-etcd :octicons-link-external-16:](https://python-etcd.readthedocs.io/en/latest/) | 0.4.5 | A Python client library for interacting with etcd |
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| [HAProxy :octicons-link-external-16:](http://www.haproxy.org/) | 2.8.15 | A high-availability and load-balancing solution |
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| [Patroni :octicons-link-external-16:](https://patroni.readthedocs.io/en/latest/) | 4.0.6 | A HA (High Availability) solution for PostgreSQL |
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| [PgAudit :octicons-link-external-16:](https://www.pgaudit.org/) | 17.1 | A detailed session or object audit logging via the standard logging facility provided by PostgreSQL |
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| [pgAudit set_user :octicons-link-external-16:](https://github.com/pgaudit/set_user) | 4.1.0 | Provides an additional layer of logging and control when unprivileged users must escalate roles for maintenance. |
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| [pgBackRest :octicons-link-external-16:](https://pgbackrest.org/) | 2.56.0 | A backup and restore solution for PostgreSQL |
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| [HAProxy :octicons-link-external-16:](http://www.haproxy.org/) | 2.8.16 | A high-availability and load-balancing solution |
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| [Patroni :octicons-link-external-16:](https://patroni.readthedocs.io/en/latest/) | 4.1.0 | A HA (High Availability) solution for PostgreSQL |
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| [PgAudit :octicons-link-external-16:](https://www.pgaudit.org/) | 18.0 | A detailed session or object audit logging via the standard logging facility provided by PostgreSQL |
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| [pgAudit set_user :octicons-link-external-16:](https://github.com/pgaudit/set_user) | 4.2.0 | Provides an additional layer of logging and control when unprivileged users must escalate roles for maintenance. |
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| [pgBackRest :octicons-link-external-16:](https://pgbackrest.org/) | 2.57.0 | A backup and restore solution for PostgreSQL |
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| [pgBadger :octicons-link-external-16:](https://github.com/darold/pgbadger) | 13.1 | A fast PostgreSQL Log Analyzer |
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| [PgBouncer :octicons-link-external-16:](https://www.pgbouncer.org/) | 1.24.1 | A lightweight connection pooler for PostgreSQL |
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| [pg_gather :octicons-link-external-16:](https://github.com/jobinau/pg_gather) | v31 | An SQL script for running the diagnostics of the health of a PostgreSQL cluster |
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| [pgpool2 :octicons-link-external-16:](https://git.postgresql.org/gitweb/?p=pgpool2.git;a=summary) | 4.6.2 | A middleware between PostgreSQL server and client for high availability, connection pooling, and load balancing |
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| [pg_repack :octicons-link-external-16:](https://github.com/reorg/pg_repack) | 1.5.2 | Rebuilds PostgreSQL database objects |
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| [pgvector :octicons-link-external-16:](https://github.com/pgvector/pgvector) | v0.8.0 | A vector similarity search for PostgreSQL |
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| [PostGIS :octicons-link-external-16:](https://github.com/postgis/postgis) | 3.3.8 | A spatial extension for PostgreSQL |
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| [PostgreSQL Common :octicons-link-external-16:](https://salsa.debian.org/postgresql/postgresql-common) | 280 | PostgreSQL database-cluster manager. Supports multiple PostgreSQL versions and clusters simultaneously |
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| [PgBouncer :octicons-link-external-16:](https://www.pgbouncer.org/) | 1.25.0 | A lightweight connection pooler for PostgreSQL |
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| [pg_gather :octicons-link-external-16:](https://github.com/jobinau/pg_gather) | v32 | An SQL script for running the diagnostics of the health of a PostgreSQL cluster |
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| [pgpool2 :octicons-link-external-16:](https://git.postgresql.org/gitweb/?p=pgpool2.git;a=summary) | 4.6.3 | A middleware between PostgreSQL server and client for high availability, connection pooling, and load balancing |
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| [pg_repack :octicons-link-external-16:](https://github.com/reorg/pg_repack) | 1.5.3 | Rebuilds PostgreSQL database objects |
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| [pg_stat_monitor](https://github.com/percona/pg_stat_monitor) | 2.3.1 | Collects and aggregates statistics for PostgreSQL and provides histogram information. |
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| [pgvector :octicons-link-external-16:](https://github.com/pgvector/pgvector) | v0.8.1 | A vector similarity search for PostgreSQL |
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| [PostGIS :octicons-link-external-16:](https://github.com/postgis/postgis) | 3.5.4 | A spatial extension for PostgreSQL |
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| [PostgreSQL Common :octicons-link-external-16:](https://salsa.debian.org/postgresql/postgresql-common) | 287 | PostgreSQL database-cluster manager. Supports multiple PostgreSQL versions and clusters simultaneously |
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| [wal2json :octicons-link-external-16:](https://github.com/eulerto/wal2json) | 2.6 | A PostgreSQL logical decoding JSON output plugin |
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| [pg_tde :octicons-link-external-16:](https://github.com/percona/pg_tde) | v2.1.0 | A PostgreSQL extension that provides Transparent Data Encryption (TDE) to protect data at rest |
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For Red Hat Enterprise Linux 8 and compatible derivatives, Percona Distribution for PostgreSQL also includes the supplemental `python3-etcd` 0.4.5 packages, which are used for setting up Patroni clusters.
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‎docs/solutions/ha-etcd-config.md‎

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# Etcd setup
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In our solutions, we use etcd distributed configuration store. [Refresh your knowledge about etcd](ha-components.md#etcd).
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In our solutions, we use etcd distributed configuration store. [Refresh your knowledge about etcd](ha-components.md#database-and-dsc-layers).
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## Install etcd
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‎docs/tarball.md‎

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The following tarballs are available for the x86_64 and ARM64 architectures:
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* [percona-postgresql-{{dockertag}}-ssl1.1-linux-aarch64.tar.gz](https://downloads.percona.com/downloads/postgresql-distribution-{{pgversion}}/{{dockertag}}/binary/tarball/percona-postgresql-{{pgsubversion}}-ssl1.1-linux-aarch64.tar.gz) - for operating systems on ARM64 architecture that run OpenSSL version 1.x
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* [percona-postgresql-{{dockertag}}-ssl1.1-linux-x86_64.tar.gz](https://downloads.percona.com/downloads/postgresql-distribution-{{pgversion}}/{{dockertag}}/binary/tarball/percona-postgresql-{{pgsubversion}}-ssl1.1-linux-x86_64.tar.gz) - for operating systems on x86_64 architecture that run OpenSSL version 1.x
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* [percona-postgresql-{{dockertag}}-ssl3-linux-aarch64.tar.gz](https://downloads.percona.com/downloads/postgresql-distribution-{{pgversion}}/{{dockertag}}/binary/tarball/percona-postgresql-{{pgsubversion}}-ssl3-linux-aarch64.tar.gz) - for operating systems on ARM64 architecture that run OpenSSL version 3.x
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* [percona-postgresql-{{dockertag}}-ssl3-linux-x86_64.tar.gz](https://downloads.percona.com/downloads/postgresql-distribution-{{pgversion}}/{{dockertag}}/binary/tarball/percona-postgresql-{{pgsubversion}}-ssl3-linux-x86_64.tar.gz) - for operating systems on x86_64 architecture that run OpenSSL version 3.x
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* [percona-postgresql-{{dockertag}}-ssl1.1-linux-aarch64.tar.gz](https://downloads.percona.com/downloads/postgresql-distribution-18/{{dockertag}}/binary/tarball/percona-postgresql-{{dockertag}}-ssl1.1-linux-aarch64.tar.gz) - for operating systems on ARM64 architecture that run OpenSSL version 1.x
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* [percona-postgresql-{{dockertag}}-ssl1.1-linux-x86_64.tar.gz](https://downloads.percona.com/downloads/postgresql-distribution-18/{{dockertag}}/binary/tarball/percona-postgresql-{{dockertag}}-ssl1.1-linux-x86_64.tar.gz) - for operating systems on x86_64 architecture that run OpenSSL version 1.x
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* [percona-postgresql-{{dockertag}}-ssl3-linux-aarch64.tar.gz](https://downloads.percona.com/downloads/postgresql-distribution-18/{{dockertag}}/binary/tarball/percona-postgresql-{{dockertag}}-ssl3-linux-aarch64.tar.gz) - for operating systems on ARM64 architecture that run OpenSSL version 3.1.x
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* [percona-postgresql-{{dockertag}}-ssl3-linux-x86_64.tar.gz](https://downloads.percona.com/downloads/postgresql-distribution-18/{{dockertag}}/binary/tarball/percona-postgresql-{{dockertag}}-ssl3-linux-x86_64.tar.gz) - for operating systems on x86_64 architecture that run OpenSSL version 3.1.x
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* [percona-postgresql-{{dockertag}}-ssl3.5-linux-aarch64.tar.gz](https://downloads.percona.com/downloads/postgresql-distribution-18/{{dockertag}}/binary/tarball/percona-postgresql-{{dockertag}}-ssl3.5-linux-aarch64.tar.gz) - for operating systems on ARM64 architecture that run OpenSSL version 3.5.x
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* [percona-postgresql-{{dockertag}}-ssl3.5-linux-x86_64.tar.gz](https://downloads.percona.com/downloads/postgresql-distribution-18/{{dockertag}}/binary/tarball/percona-postgresql-{{dockertag}}-ssl3.5-linux-x86_64.tar.gz) - for operating systems on x86_64 architecture that run OpenSSL version 3.5.x
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To check what OpenSSL version you have, run the following command:
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‎mkdocs.yml‎

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- Uninstall: uninstalling.md
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- Release notes:
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- "Release notes index": release-notes/release-notes.md
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- "18.0.1": release-notes/release-notes-v18.1.1.md
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- "18.1.1": release-notes/release-notes-v18.1.1.md
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- Reference:
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- Telemetry: telemetry.md
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- Licensing: licensing.md

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