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Commita19f83f

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docs: Enhance the pg_stat_checkpointer view documentation.
This commit updates the documentation for the pg_stat_checkpointer viewto clarify what kind of checkpoints or restartpoints each counter tracks.This makes it easier to understand the meaning of each counter.Previously, the num_requested description included "backend,"which could be misleading since requests come from other sources as well.This commit also removes "backend" from the description of num_requested,to avoid confusion.Author: Fujii MasaoReviewed-by: Anton A. MelnikovDiscussion:https://postgr.es/m/4640258e-d959-4cf0-903c-cd02389c3e05@oss.nttdata.com
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‎doc/src/sgml/monitoring.sgml

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@@ -3051,10 +3051,7 @@ description | Waiting for a newly initialized WAL file to reach durable storage
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<structfield>num_timed</structfield> <type>bigint</type>
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</para>
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<para>
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Number of scheduled checkpoints due to timeout.
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Note that checkpoints may be skipped if the server has been idle
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since the last one, and this value counts both completed and
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skipped checkpoints
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Number of scheduled checkpoints due to timeout
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</para></entry>
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</row>
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@@ -3063,7 +3060,7 @@ description | Waiting for a newly initialized WAL file to reach durable storage
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<structfield>num_requested</structfield> <type>bigint</type>
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</para>
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<para>
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Number ofbackendrequested checkpoints
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Number of requested checkpoints
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</para></entry>
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</row>
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@@ -3146,6 +3143,18 @@ description | Waiting for a newly initialized WAL file to reach durable storage
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</tgroup>
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</table>
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<para>
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Checkpoints may be skipped if the server has been idle since the last one.
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<structfield>num_timed</structfield> and
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<structfield>num_requested</structfield> count both completed and skipped
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checkpoints, while <structfield>num_done</structfield> tracks only
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the completed ones. Similarly, restartpoints may be skipped
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if the last replayed checkpoint record is already the last restartpoint.
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<structfield>restartpoints_timed</structfield> and
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<structfield>restartpoints_req</structfield> count both completed and
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skipped restartpoints, while <structfield>restartpoints_done</structfield>
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tracks only the completed ones.
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</para>
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</sect2>
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<sect2 id="monitoring-pg-stat-wal-view">

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