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Document Auto-vacuum Starvation

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1-3 小时
新手友好度
35/100
Issue 类型
文档
描述清晰度
基本清楚
活跃度
停滞
技术栈
postgresql

调研方向

Start by reading the linked que vacuuming documentation and the existing River documentation to find the appropriate place for guidance on PostgreSQL auto-vacuum starvation. Done means documenting a mitigation for high-churn tables and explaining how River users can avoid poor job-selection performance.

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描述

documentation

I think we implemented this after your time at Heroku. We finally realized that sometimes the 2 PG auto vacuum processes would both end up working on tables that were taking hours to complete. That kept them from vacuuming the que_jobs table, which would lead to poor performance. We ended up adding a clock process task to manually vacuum our high churn tables at regular intervals, and we haven't seen poor job selection performance since.

It might be worthwhile to add something similar to what que has to your docs to mitigate this potential issue for river users.

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Go
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