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Commit3465c8a

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doc: Improve descriptions of tup_returned and tup_fetched in pg_stat_database
Previously the descriptions of tup_returned and tup_fetched columnsin pg_stat_database view were confusing. This commit improves themso that they represent the following formulas of those columnsmore accurately.* pg_stat_database.tup_returned = sum(pg_stat_all_tables.seq_tup_read) + sum(pg_stat_all_indexes.idx_tup_read)* pg_stat_database.tup_fetched = sum(pg_stat_all_tables.idx_tup_fetch)In these formulas, note that the counters for some system catalogslike pg_database shared across all databases of a cluster are excludedfrom the calculations of sum.Author: Masahiro IkedaReviewed-by: Fujii MasaoDiscussion:https://postgr.es/m/9eeeccdb-5dd7-90f9-2807-a4b5d2b76ca3@oss.nttdata.com
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‎doc/src/sgml/monitoring.sgml

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@@ -3712,7 +3712,7 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
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<structfield>tup_returned</structfield> <type>bigint</type>
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</para>
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<para>
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Number of rows returned byqueries in this database
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Number ofliverowsfetched by sequential scans and index entriesreturned byindex scans in this database
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</para></entry>
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</row>
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@@ -3721,7 +3721,7 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
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<structfield>tup_fetched</structfield> <type>bigint</type>
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</para>
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<para>
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Number of rows fetched byqueries in this database
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Number ofliverows fetched byindex scans in this database
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</para></entry>
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</row>
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