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A confusion which comes a lot from users is that it is necessary to issue a checkpoint on a freshly-promoted standby so as its control file has up-to-date timeline information which is used by pg_rewind to validate the operation. Let's document that properly. This is back-patched down to 9.5 where pg_rewind has been introduced. Author: Michael Paquier Reviewed-by: Magnus Hagander Discussion: https://postgr.es/m/CABUevEz5bpvbwVsYCaSMV80CBZ5-82nkMzbb+Bu=h1m=rLdn=g@mail.gmail.com Backpatch-through: 9.5