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Add num_done counter to the pg_stat_checkpointer view.

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Checkpoints can be skipped when the server is idle. The existing num_timed and
num_requested counters in pg_stat_checkpointer track both completed and
skipped checkpoints, but there was no way to count only the completed ones.

This commit introduces the num_done counter, which tracks only completed
checkpoints, making it easier to see how many were actually performed.

Bump catalog version.

Author: Anton A. Melnikov
Reviewed-by: Fujii Masao
Discussion: https://postgr.es/m/9ea77f40-818d-4841-9dee-158ac8f6e690@oss.nttdata.com
This commit is contained in:
Fujii Masao
2024-09-30 11:56:05 +09:00
parent 20cfec896c
commit 559efce1d6
11 changed files with 60 additions and 19 deletions
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11
doc/src/sgml/monitoring.sgml
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@ -3063,7 +3063,16 @@ description | Waiting for a newly initialized WAL file to reach durable storage
<structfield>num_requested</structfield> <type>bigint</type>
</para>
<para>
Number of requested checkpoints that have been performed
Number of backend requested checkpoints
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>num_done</structfield> <type>bigint</type>
</para>
<para>
Number of checkpoints that have been performed
</para></entry>
</row>