---
格式版本: 2
标题: "PostgreSQL 19 Beta 3 is now available in Amazon RDS Database Preview Environment"
原文链接: "https://aws.amazon.com/cn/about-aws/whats-new/2026/08/postgresql-19-beta-3-amazon-rds-database-preview-environment/"
发布日期: "2026-08-18"
发布时间校准状态: "found"
发布时间需复核: "否"
发布时间来源: "llm:local:original_script_field"
发布时间证据: "postDateTime: 2026-08-18T16:00:00Z"
发布时间校准原因: "该日期是脚本字段中的postDateTime，明确标注为文章发布时间，与标题内容相符。"
发布时间校准置信度: "1"
发布时间候选数量: 1
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发布时间原页读取状态: "source template page reused from URL open"
发布时间未找到原因: ""
发布时间校准时间: "2026-08-21T09:56:17+08:00"
发布时间仲裁状态: "confirmed"
发布时间仲裁尝试次数: 1
发布时间仲裁耗时毫秒: 16178
发现时间: "2026-08-21T09:50:45+08:00"
入库时间: "2026-08-21T01:56:35.460Z"
来源平台: "固定入口"
搜索渠道: "fixed_url"
搜索词: "https://aws.amazon.com/new"
匹配关键词:
  - "performance"
相关厂家:
  - "AWS"
相关专家:
  []
内容类型: "网页"
抓取工具: "Free Fetch + Defuddle"
清洗工具: "Defuddle Markdown + Defuddle/Readability 正文提取"
原始附件:
  []
AI优质: "否"
AI打分: 26
AI分档: "非优质"
AI质检状态: "不通过"
AI打分理由: "内容为Amazon RDS PostgreSQL 19 Beta 3数据库预览环境发布，仅涉及数据库查询性能与维护功能，与超节点、AI Rack、机柜级AI基础设施、高速互连、供电液冷等核心主题完全无关。"
AI质检模型: "ali-deepseek-v4-flash"
AI质检时间: "2026-08-21T09:57:38+08:00"
AI主题相关性: 0
AI来源权威性: 13
AI新颖性: 5
AI技术细节: 0
AI商业部署信号: 0
AI完整性: 8
AI摘要: "Amazon RDS for PostgreSQL 推出 PostgreSQL 19 Beta 3 预览版，新增并行 autovacuum、pg_plan_advice 查询计划锁定及急切聚合等功能，以提升查询性能和自动清理管理。"
AI摘要模型: "ali-deepseek-v4-flash"
AI摘要时间: "2026-09-07T02:13:26.019Z"
采集批次: "2026年8月21日9点50分40秒"
采集批次ID: "20260821-095040-035"
去重键: "https://aws.amazon.com/cn/about-aws/whats-new/2026/08/postgresql-19-beta-3-amazon-rds-database-preview-environment"
---

Starting today, [Amazon RDS for PostgreSQL](https://aws.amazon.com/rds/postgresql/) 19 Beta 3 is available in the [Amazon RDS Database Preview Environment](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/create-db-instance-in-preview-environment.html), allowing you to evaluate the pre-release of PostgreSQL 19 on Amazon RDS for PostgreSQL.

PostgreSQL 19 Beta 3 adds new capabilities for query performance and autovacuum management. The new pg\_stat\_autovacuum\_scores view helps you monitor and tune autovacuum prioritization. Parallel autovacuum can now use multiple workers to speed up maintenance on large tables. The new pg\_plan\_advice module lets you lock in efficient query plans to avoid unexpected slowdowns. Eager aggregation improves analytical queries by grouping data earlier, so queries process fewer rows and complete faster. Beta 3 also includes bug fixes and stability improvements from the Beta 2 testing period. Refer to the [PostgreSQL community announcement](https://www.postgresql.org/about/news/postgresql-186-1711-1615-1519-1424-and-19-beta-3-released-3365/) for more details.

Amazon RDS Database Preview Environment database instances are retained for a maximum period of 60 days and are automatically deleted after the retention period. Amazon RDS database snapshots that are created in the Preview Environment can only be used to create or restore database instances within the Preview Environment. You can use the PostgreSQL dump and load functionality to import or export your databases from the Preview Environment. Amazon RDS Database Preview Environment database instances are priced as per the [pricing](https://aws.amazon.com/rds/postgresql/pricing/) in the US East (Ohio) Region.