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Greenplum分布式事务和两阶段提交协议
redo log,没有undo log,事务回滚不需要做undo操作 • PG采用的是MVCC,更新操作不是in-place update,而是重新创建tuple, 可见性判断 • Robert Haas 2018, “DO or UNDO - there is no VACUUM”: zheap, in-place update PostgreSQL和Greenplum采用的策略0 码力 | 42 页 | 2.12 MB | 1 年前3
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