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Add mem_exceeded_count column to pg_stat_replication_slots.

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This commit introduces a new column mem_exceeded_count to the
pg_stat_replication_slots view. This counter tracks how often the
memory used by logical decoding exceeds the logical_decoding_work_mem
limit. The new statistic helps users determine whether exceeding the
logical_decoding_work_mem limit is a rare occurrences or a frequent
issue, information that wasn't available through existing statistics.

Bumps catversion.

Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: shveta malik <shveta.malik@gmail.com>
Reviewed-by: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/978D21E8-9D3B-40EA-A4B1-F87BABE7868C@yesql.se
This commit is contained in:
Masahiko Sawada
2025-10-08 10:05:04 -07:00
parent 14ad0d7bf2
commit d3b6183dd9
13 changed files with 113 additions and 60 deletions
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11
doc/src/sgml/monitoring.sgml
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@@ -1620,6 +1620,17 @@ description | Waiting for a newly initialized WAL file to reach durable storage
</entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>mem_exceeded_count</structfield><type>bigint</type>
</para>
<para>
Number of times the memory used by logical decoding has exceeded
<literal>logical_decoding_work_mem</literal>.
</para>
</entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>total_txns</structfield> <type>bigint</type>