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Commitc1a47df

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vacuumlazy.c: Remove obsolete 'onecall' comment.
Remove obsolete reference to lazy_vacuum()'s onecall argument. Thefunction argument was removed by commit3499df0.Also remove adjoining comment block that introduces the wraparoundfailsafe concept. Talking about the failsafe here no longer makessense, since lazy_vacuum() (and related functions) are no longer theonly place where the failsafe might be triggered. This has been thecase since commitc242baa taught VACUUM to consider triggering thefailsafe mechanism during its initial heap scan.
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‎src/backend/access/heap/vacuumlazy.c

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@@ -2073,13 +2073,7 @@ lazy_scan_prune(LVRelState *vacrel,
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*
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* We may choose to bypass index vacuuming at this point, though only when the
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* ongoing VACUUM operation will definitely only have one index scan/round of
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* index vacuuming. Caller indicates whether or not this is such a VACUUM
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* operation using 'onecall' argument.
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*
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* In rare emergencies, the ongoing VACUUM operation can be made to skip both
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* index vacuuming and index cleanup at the point we're called. This avoids
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* having the whole system refuse to allocate further XIDs/MultiXactIds due to
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* wraparound.
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* index vacuuming.
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*/
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staticvoid
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lazy_vacuum(LVRelState*vacrel)

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