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postgresql/src/include/access
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Heikki Linnakangas c4b71e6f60 Remove some unnecessary code from multixact truncation 
With 64-bit multixact offsets, PerformMembersTruncation() doesn't need
the starting offset anymore. The 'oldestOffset' value that
TruncateMultiXact() calculates is no longer used for anything. Remove
it, and the code to calculate it.

'oldestOffset' was included in the WAL record as 'startTruncMemb',
which sounds nice if you e.g. look at the WAL with pg_waldump, but it
was also confusing because we didn't actually use the value for
determining what to truncate. Replaying the WAL would remove all
segments older than 'endTruncMemb', regardless of
'startTruncMemb'. The 'startTruncOff' stored in the WAL record was
similarly unnecessary even before 64-bit multixid offsets, it was
stored just for the sake of symmetry with 'startTruncMemb'. Remove
both from the WAL record, and rename the remaining 'endTruncOff' to
'oldestMulti' and 'endTruncMemb' to 'oldestOffset', for consistency
with the variable names used for them in other places.

Reviewed-by: Andrey Borodin <x4mmm@yandex-team.ru>
Discussion: https://www.postgresql.org/message-id/000301b2-5b81-4938-bdac-90f6eb660843@iki.fi
2026-01-15 13:34:50 +02:00
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amapi.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
amvalidate.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
attmap.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
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brin.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
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commit_ts.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
detoast.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
genam.h Move instrumentation-related structs to instrument_node.h 2026-01-12 16:59:28 +01:00
generic_xlog.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
gin.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
gin_private.h Inline ginCompareAttEntries for speed 2026-01-09 20:31:43 +02:00
gin_tuple.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
ginblock.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
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hash.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
hash_xlog.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
heapam.h heapam: Add batch mode mvcc check and use it in page mode 2026-01-12 13:22:04 -05:00
heapam_xlog.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
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htup_details.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
itup.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
multixact.h Remove some unnecessary code from multixact truncation 2026-01-15 13:34:50 +02:00
multixact_internal.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
nbtree.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
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relation.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
reloptions.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
relscan.h Stop including {brin,gin}_tuple.h in tuplesort.h 2026-01-12 18:09:49 +01:00
rewriteheap.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
rmgr.h Pre-beta mechanical code beautification. 2022-05-12 15:17:30 -04:00
rmgrdesc_utils.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
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xact.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
xlog.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
xlog_internal.h Remove some unnecessary code from multixact truncation 2026-01-15 13:34:50 +02:00
xlogarchive.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
xlogbackup.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
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xlogstats.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
xlogutils.h Update copyright for 2026 2026-01-01 13:24:10 -05:00
xlogwait.h Extend xlogwait infrastructure with write and flush wait types 2026-01-05 19:56:19 +02:00