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Since 11, it is possible to use a non-superuser role when using an online source cluster with pg_rewind as long as the role has proper permissions to execute on the source all the functions used by pg_rewind, and the documentation stated that a superuser is necessary. Let's add at the same time all the details needed to create such a role. A second 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 |
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