pg_resetxlog: add option to set oldest xid & use by pg_upgrade
Bruce Momjian <bruce@momjian.us>
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
Files
| Path | Change | +/− |
|---|---|---|
| doc/src/sgml/ref/pg_resetwal.sgml | modified | +20 −0 |
| src/bin/pg_resetwal/pg_resetwal.c | modified | +38 −28 |
| src/bin/pg_upgrade/controldata.c | modified | +16 −1 |
| src/bin/pg_upgrade/pg_upgrade.c | modified | +7 −0 |
| src/bin/pg_upgrade/pg_upgrade.h | modified | +1 −0 |