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3 articles on Mvcc — news, releases, guides and analysis from the SourceFeed engine.

Postgres's 2-Billion-Transaction Time Bomb Is Still Ticking

Wraparound took down Sentry and Mandrill, yet 64-bit XIDs remain stuck outside core Postgres.

zheap tried undo logs and stalled. OrioleDB's bet is that you have to version the key space too.

The garbage bill for concurrent reads and writes is conserved — each database only chooses who pays, when, and how it breaks.

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