Tag Archives: agreesive

PostgreSQL 對 Vacuum 效能的改善

在「No More Full-Table Vacuums」這邊提到了 PostgreSQL 在 vacuum 時效能的大幅改善,尤其是大型資料庫在 vacuum 時需要對整個表格從頭到尾掃一次以確保 transaction id 的正確性: Current releases of PostgreSQL need to read every page in the database at least once every 2 billion write transactions (less, with default settings) to verify that … Continue reading

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