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Massive DELETEs
April 19, 2024, 1 p.m. | Nikolay Samokhvalov and Michael Christofides
Postgres FM postgres.fm
Nikolay and Michael discuss doing massive DELETE operations in Postgres — what can go wrong, how to prevent major issues, and some ideas to minimise their impact.
Here are some links to things they mentioned:
- Article based on Nikolay’s talk, including batching implementation (translated to English) https://habr-com.translate.goog/en/articles/523536/?_x_tr_sl=ru&_x_tr_tl=en&_x_tr_hist=true
- Our episode on WAL and checkpoint tuning https://postgres.fm/episodes/wal-and-checkpoint-tuning
- Egor Rogov’s book on Postgres Internals (chapter 10 on WAL) https://edu.postgrespro.com/postgresql_internals-14_en.pdf
- full_page_writes https://www.postgresql.org/docs/current/runtime-config-wal.html#GUC-FULL-PAGE-WRITES
- TRUNCATE https://www.postgresql.org/docs/current/sql-truncate.html
- Our episode on partitioning https://postgres.fm/episodes/partitioning
- Our episode on bloat https://postgres.fm/episodes/bloat …
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