github sysown/proxysql v3.1.8
ProxySQL 3.1.8
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latest release: v3.0.8...
pre-release8 hours ago

ProxySQL 3.1.8 Release Notes

Release date: 2026-04-25

ProxySQL 3.1.8 is a maintenance release for the Innovative Tier, incorporating all improvements from ProxySQL 3.0.8. This version is built using PROXYSQL31=1, which enables the Fast Forward Traffic Observer (FFTO) and Time-Series Database (TSDB) subsystems.

Release commit: 6ef036a00c6f1dbcf3f27fe7f6e07f3211d7d6f8

Highlights (Innovative Tier)

  • Inherits All 3.0.8 Improvements: MySQL session-variable tracking (#5166), PostgreSQL Cluster Sync (#5297), per-server PgSQL backend SSL (#5583), PgSQL backend SSL keylog (#5567), mid-transaction backend-death recovery (#5654, #5659), mysql-zstd_compression_level (#5637), mysql-resolution_family (#5554), and the caching_sha2_password hex-rounds authentication fix.
  • FFTO Stays Opt-In in 3.1.x: FFTO remains disabled by default in 3.1.x (introduced in 3.1.7 for stability). Administrators who wish to use FFTO must explicitly enable it via mysql-enable_ffto / pgsql-enable_ffto. FFTO continues to be enabled by default in 4.0.x.
  • TSDB Behavior Unchanged: No user-visible TSDB changes this cycle; the lib-wide warning cleanup and lint sweep also touch TSDB compile-time hygiene without altering behavior.
  • No Rust Toolchain Required: Removal of the vendored sqlite-rembed extension (the only consumer of rustc/cargo) means PROXYSQL31=1 builds no longer require the Rust toolchain.
  • Innovative-Tier Package Coverage: The new on-demand package pipeline produces proxysql-3.1.8-* RPMs / DEBs for 13 distros × 2 architectures and proxysql-3.1.8-<sha>-macos-<arch>.tar.gz tarballs for macOS.

New Features (3.1.x)

This release does not add 3.1.x-specific features beyond what is inherited from 3.0.8. FFTO and TSDB behavior is unchanged from 3.1.7 except for cross-cutting code-quality improvements (warning cleanup, lint pass, deprecated-API migration) that also apply to those subsystems.

Features Inherited from v3.0.8 (Stable Tier)

ProxySQL 3.1.8 includes all features, bug fixes, and improvements from the v3.0.8 release, including:

  • MySQL Session-Variable Tracking — new mysql-session_track_system_variables mode (DISABLED / OPTIONAL / ENFORCED) with backend-driven variable sync and per-server backoff (#5166).
  • PostgreSQL Cluster Sync — peer-to-peer sync for PgSQL admin tables with runtime checksums and save-to-disk (#5297).
  • Per-Server PgSQL Backend SSL — new pgsql_servers_ssl_params admin table mirroring mysql_servers_ssl_params (#5583).
  • PgSQL Backend SSL Keylog — NSS-format keylog for PgSQL backends via libpq PQsetSSLKeyLogCallback patch (#5567).
  • PgSQL Mid-Transaction Backend-Death Recovery — pgsql-preserve_client_on_broken_backend_in_tx (default true) keeps client sessions alive across mid-tx backend death, with new pgsql_tx_poisoned_* counters (#5654, #5659).
  • PgSQL Monitor: Scheduler Clamp on Interval Change — runtime interval changes take effect immediately (#5614).
  • PgSQL CopyCmdMatcher — fast-reject + comment-tolerant regex (#5596).
  • GTID Ranged Updates — internal Gtid_Interval/GTID_Set rework + I3/I4 wire-message parsing (#5224, #5557).
  • MySQL mysql-zstd_compression_level — decoupled from zlib, range 1–22 default 3 (#5637).
  • MySQL mysql-resolution_family — deterministic IPv4/IPv6 backend hostname resolution (#5554).
  • Greeting Capabilities Restored — upper-word capability bits re-advertised in the MySQL greeting.
  • Authentication: caching_sha2_password rounds parsed as hex; CACHING_SHA2_PASSWORD() accepts an optional rounds argument (#5640).
  • Bug Fixes: MySQL 9.x charset handling in validate_charset; GR Monitor first-iteration probe; GTID range validation; GTID parser NULL check after strchr; PgSQL MD5 → EVP migration.
  • Build & Platform: macOS build support (#5664); no Rust toolchain required after sqlite-rembed removal (#5616); 156 on-demand Linux package workflows + 6 macOS workflows landing in a single canonical draft release (#5662, #5666, #5668, #5671); ASAN unit-test coverage (#5618).
  • Code Quality: lint and static-analysis sweep across ~100+ files (#5594).

For a detailed list of these core improvements, please refer to the ProxySQL 3.0.8 Release Notes.

Contributors

ProxySQL is a community-driven project, and we are grateful to all the contributors who helped make this release possible. A special thank you to:

  • @wazir-ahmed for MySQL session-variable tracking (#5166), GTID range parsing and unit tests, the GTID strchr NULL-check, and ENFORCED-mode capability preservation.
  • @rahim-kanji for PostgreSQL Cluster Sync (#5297), the mid-transaction backend-death recovery (#5654, #5659), per-server PgSQL SSL parameters (#5583), PgSQL backend SSL keylog (#5567), the CopyCmdMatcher improvements (#5596), the PgSQL Monitor scheduler clamp (#5614), and the MD5→EVP migration.
  • @proton-lisandro-pin for the initial GTID interval refactor that made ranged updates possible (#5224).
  • @mirostauder for continued build system and distribution-support work.

We also thank everyone who reported bugs, tested experimental features, and provided feedback during this release cycle.

Hashes

The release commit is: 6ef036a00c6f1dbcf3f27fe7f6e07f3211d7d6f8

SHA256s: 

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