Bruce Momjian 7626e9f2be pg_resetxlog: add option to set oldest xid & use by pg_upgrade ... Add pg_resetxlog -u option to set the oldest xid in pg_control. Previously -x set this value be -2 billion less than the -x value. However, this causes the server to immediately scan all relation's relfrozenxid so it can advance pg_control's oldest xid to be inside the autovacuum_freeze_max_age range, which is inefficient and might disrupt diagnostic recovery. pg_upgrade will use this option to better create the new cluster to match the old cluster. Reported-by: Jason Harvey, Floris Van Nee Discussion: https://postgr.es/m/20190615183759.GB239428@rfd.leadboat.com, 87da83168c644fd9aae38f546cc70295@opammb0562.comp.optiver.com Author: Bertrand Drouvot Backpatch-through: 9.6		2021-07-26 22:38:14 -04:00
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src	pg_resetxlog: add option to set oldest xid & use by pg_upgrade	2021-07-26 22:38:14 -04:00
KNOWN_BUGS
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MISSING_FEATURES
TODO	Change documentation references to PG website to use https: not http:	2017-05-20 21:50:47 -04:00