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Add seq_sync_error_count to subscription statistics.

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This commit adds a new column, seq_sync_error_count, to the
pg_stat_subscription_stats view. This counter tracks the number of errors
encountered by the sequence synchronization worker during operation.

Since a single worker handles the synchronization of all sequences, this
value may reflect errors from multiple sequences. This addition improves
observability of sequence synchronization behavior and helps monitor
potential issues during replication.

Author: Vignesh C <vignesh21@gmail.com>
Reviewed-by: shveta malik <shveta.malik@gmail.com>
Reviewed-by: Peter Smith <smithpb2250@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/CAA4eK1LC+KJiAkSrpE_NwvNdidw9F2os7GERUeSxSKv71gXysQ@mail.gmail.com
This commit is contained in:
Amit Kapila
2025-11-07 08:05:08 +00:00
parent c32e32f763
commit f6a4c498dc
12 changed files with 143 additions and 62 deletions
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11
doc/src/sgml/monitoring.sgml
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@@ -2192,6 +2192,17 @@ description | Waiting for a newly initialized WAL file to reach durable storage
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>seq_sync_error_count</structfield> <type>bigint</type>
</para>
<para>
Number of times an error occurred in the sequence synchronization
worker. A single worker synchronizes all sequences, so one error
increment may represent failures across multiple sequences.
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>sync_error_count</structfield> <type>bigint</type>