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The formulas for SEMMNI and SEMMNS do not include the archiver process, which was converted to an auxiliary process in v14, and the WAL summarizer process, which was introduced in v17. This commit corrects these formulas and adds a missing reference to max_wal_senders nearby. Since this section of the documentation tends to be incorrect quite often, we should likely give up on documenting the exact formulas in favor of something less fragile, but that is left as a future exercise. Reported-by: Sami Imseih Reviewed-by: Sami Imseih Discussion: https://postgr.es/m/20240517164452.GA1914161%40nathanxps13 Backpatch-through: 12