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Commitbfe1ead

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doc: Improve description of index vacuuming with GUCs
Index vacuums may happen multiple times depending on the number of deadtuples stored, as of maintenance_work_mem for a manual VACUUM. Forautovacuum, this is controlled by autovacuum_work_mem instead, if set.The documentation mentioned the former, but not the latter in thecontext of autovacuum.Reported-by: Nikolai BerkoffAuthor: Laurenz Albe, Euler TaveiraDiscussion:https://postgr.es/m/161545365522.10134.12195402324485546870@wrigleys.postgresql.orgBackpatch-through: 9.6
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‎doc/src/sgml/monitoring.sgml

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@@ -6142,8 +6142,9 @@ SELECT pg_stat_get_backend_pid(s.backendid) AS pid,
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<command>VACUUM</command> is currently vacuuming the indexes. If a table has
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any indexes, this will happen at least once per vacuum, after the heap
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has been completely scanned. It may happen multiple times per vacuum
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if <xref linkend="guc-maintenance-work-mem"/> is insufficient to
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store the number of dead tuples found.
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if <xref linkend="guc-maintenance-work-mem"/> (or, in the case of autovacuum,
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<xref linkend="guc-autovacuum-work-mem"/> if set) is insufficient to store
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the number of dead tuples found.
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</entry>
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</row>
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<row>

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