Sync Fork from Upstream Repo #141
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Fixed more than 10 years ago. Reviewed-by: Noah Misch <noah@leadboat.com> Discussion: https://www.postgresql.org/message-id/flat/aa266ede-baaa-f4e6-06cf-5b1737610e9a%402ndquadrant.com
The version being checked for is 20 years old. Reviewed-by: Marco Atzeri <marco.atzeri@gmail.com> Discussion: https://www.postgresql.org/message-id/flat/aa266ede-baaa-f4e6-06cf-5b1737610e9a%402ndquadrant.com
Since commit 865f14a made "=>" unusable as an operator name, it's been impossible either to install hstore 1.0 or to execute this update script. There's not much point in continuing to ship it. Discussion: https://postgr.es/m/653936.1597431032@sss.pgh.pa.us
The SimpleLruTruncate() header comment states the new coding rule. To achieve this, add locktype "frozenid" and two LWLocks. This closes a rare opportunity for data loss, which manifested as "apparent wraparound" or "could not access status of transaction" errors. Data loss is more likely in pg_multixact, due to released branches' thin margin between multiStopLimit and multiWrapLimit. If a user's physical replication primary logged ": apparent wraparound" messages, the user should rebuild standbys of that primary regardless of symptoms. At less risk is a cluster having emitted "not accepting commands" errors or "must be vacuumed" warnings at some point. One can test a cluster for this data loss by running VACUUM FREEZE in every database. Back-patch to 9.5 (all supported versions). Discussion: https://postgr.es/m/20190218073103.GA1434723@rfd.leadboat.com
Put the -r option in the right section (it certainly isn't an option controlling "the location and format of the output"). Clarify the behavior of the tablespace and waldir options (that part per gripe from robert@interactive.co.uk). Make a large number of small copy-editing fixes in text that visibly wasn't written by native speakers, and try to avoid grammatical inconsistencies between the descriptions of the different options. Back-patch to v13, since HEAD hasn't meaningfully diverged yet. Discussion: https://postgr.es/m/159749418850.14322.216503677134569752@wrigleys.postgresql.org
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