| Lists: | pgsql-committers |
|---|
| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: pg_resetxlog: add option to set oldest xid & use by pg_upgrade |
| Date: | 2021-07-27 02:38:49 |
| Message-ID: | [email protected] |
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| Lists: | pgsql-committers |
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/[email protected], 87da83168c644fd9aae38f546cc70295(at)opammb0562(dot)comp(dot)optiver(dot)com
Author: Bertrand Drouvot
Backpatch-through: 9.6
Branch
------
REL_14_STABLE
Modified Files
--------------
doc/src/sgml/ref/pg_resetwal.sgml | 20 +++++++++++
src/bin/pg_resetwal/pg_resetwal.c | 72 ++++++++++++++++++++++-----------------
src/bin/pg_upgrade/controldata.c | 17 ++++++++-
src/bin/pg_upgrade/pg_upgrade.c | 7 ++++
src/bin/pg_upgrade/pg_upgrade.h | 1 +
5 files changed, 85 insertions(+), 32 deletions(-)