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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 | 695b4a113abca380fd7aed26cefa039e4e8cd569 (patch) | |
| tree | 38003f07a1bda443adc47414bbb4ab0525fc2586 /src/backend/parser/parse_coerce.c | |
| parent | 611e42444b121370f561d860552beb7d28dacbf8 (diff) | |
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/parser/parse_coerce.c')
0 files changed, 0 insertions, 0 deletions