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| author | Bruce Momjian <bruce@momjian.us> | 2021-07-26 22:38:14 -0400 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2021-07-26 22:38:14 -0400 |
| commit | 0a5e708e2bd87adb0779d7c8758e5743cc1c0adf (patch) | |
| tree | daa4b3447aa38d93a87ea6d70f0b0238296c5633 /src/backend/utils/adt/numeric.c | |
| parent | 882d15144bbb21856676ff046faee1e9a580e3e4 (diff) | |
| download | postgresql-0a5e708e2bd87adb0779d7c8758e5743cc1c0adf.tar.gz postgresql-0a5e708e2bd87adb0779d7c8758e5743cc1c0adf.zip | |
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
Diffstat (limited to 'src/backend/utils/adt/numeric.c')
0 files changed, 0 insertions, 0 deletions