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Aside from corrupting data, this error has been observed to result in significant bloat of standby servers compared to their masters, due to updates being applied far beyond where the end-of-file should have been. This failure mode does not appear to be a significant risk during crash recovery, only when initially synchronizing a standby created from a base backup taken from a quickly-changing master.","part":"changes","patch_ids":[],"related_changes":[{"db_id":"25de053281805a245fab1b676779dcc4","evidence":{"patch_ids":[],"same_day":true,"statement_hash":"5fa863dcde2a1d7341f36113f83ccf1ab25fb8fdfa8473169a331d534819dff5"},"kind":"equivalent","label":"9.3.3","source_url":"/docs/release/9.3.3/#id-1.11.6.27.5","title":"修复当关系的某些段不是完整大小时 WAL 记录可能被错误重放的问题","url":"/docs/compare/?release=9.3.3#9.3.3-358be8d16b225d0a","version":"9.3.3"},{"db_id":"2b001c634d577b177a7b6908f8431b7e","evidence":{"patch_ids":[],"same_day":true,"statement_hash":"5fa863dcde2a1d7341f36113f83ccf1ab25fb8fdfa8473169a331d534819dff5"},"kind":"equivalent","label":"9.2.7","source_url":"/docs/release/9.2.7/#id-1.11.6.22.5","title":"修复当关系的某些段不是完整大小时 WAL 记录可能被错误重放的问题","url":"/docs/compare/?release=9.2.7#9.2.7-358be8d16b225d0a","version":"9.2.7"},{"db_id":"6a64aabe3f3ed8e232a5d6564458bbf0","evidence":{"patch_ids":[],"same_day":true,"statement_hash":"5fa863dcde2a1d7341f36113f83ccf1ab25fb8fdfa8473169a331d534819dff5"},"kind":"equivalent","label":"9.0.16","source_url":"/docs/release/9.0.16/#id-1.11.6.12.5","title":"修复当关系的某些段不是完整大小时 WAL 记录可能被错误重放的问题","url":"/docs/compare/?release=9.0.16#9.0.16-358be8d16b225d0a","version":"9.0.16"}],"relations":[{"evidence":{"patch_ids":[],"same_day":true,"statement_hash":"5fa863dcde2a1d7341f36113f83ccf1ab25fb8fdfa8473169a331d534819dff5"},"rule":2,"target":"25de053281805a245fab1b676779dcc4","type":"equivalent"},{"evidence":{"patch_ids":[],"same_day":true,"statement_hash":"5fa863dcde2a1d7341f36113f83ccf1ab25fb8fdfa8473169a331d534819dff5"},"rule":2,"target":"2b001c634d577b177a7b6908f8431b7e","type":"equivalent"},{"evidence":{"patch_ids":[],"same_day":true,"statement_hash":"5fa863dcde2a1d7341f36113f83ccf1ab25fb8fdfa8473169a331d534819dff5"},"rule":2,"target":"6a64aabe3f3ed8e232a5d6564458bbf0","type":"equivalent"}],"section":"变更","section_path":["变更"],"source_commits":[],"source_entry_id":"9.1.12/changes/009","source_hash":"67da68ededb4274d5005277f690d441d145fbca2820fe70a583da788d40a5014","source_url":"/docs/release/9.1.12/#id-1.11.6.17.5","statement_hash":"5fa863dcde2a1d7341f36113f83ccf1ab25fb8fdfa8473169a331d534819dff5","text":"修复当关系的某些段不是完整大小时 WAL 记录可能被错误重放的问题（Greg Stark、Tom Lane） WAL 更新可能被应用到错误的页面，甚至可能偏后很多页。除了损坏数据外，已观察到这一错误导致备库相比主库显著“膨胀”，因为更新被应用到了远超文件末尾应在位置的地方。这种失败模式在崩溃恢复期间似乎不构成重大风险，只在初始同步从快速变化的主库基础备份创建的备库时出现。","title":"修复当关系的某些段不是完整大小时 WAL 记录可能被错误重放的问题","variants":[],"version":"9.1.12"},{"also_in":[],"category":"bugfix","category_label":"Bug fixes","commit_aliases":[],"commit_groups":[],"commits":[],"cves":[],"db_id":"0ff932aeacb12930c82887b483ca71f4","html":"\u003cp\u003e修复判断恢复何时达到一致性的缺陷（Tomonari Katsumata、Heikki Linnakangas）\u003c/p\u003e\n\u003cp\u003e某些情况下，WAL 重放会错误地在重放开始时就断定数据库已一致，从而可能在数据库真正一致之前允许热备查询。也可能出现其他症状，例如 \u003cspan\u003e“\u003cspan\u003ePANIC: WAL contains references to invalid pages\u003c/span\u003e”\u003c/span\u003e。\u003c/p\u003e","id":"9.1.12-f8e05985761562f6","identity_text":"Fix bug in determining when recovery has reached consistency (Tomonari Katsumata, Heikki Linnakangas) In some cases WAL replay would mistakenly conclude that the database was already consistent at the start of replay, thus possibly allowing hot-standby queries before the database was really consistent. 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