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Add slotsync skip statistics.

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This patch adds two new columns to the pg_stat_replication_slots view:
slotsync_skip_count - the total number of times a slotsync operation was
skipped.
slotsync_skip_at - the timestamp of the most recent skip.

These additions provide better visibility into replication slot
synchronization behavior.

A future patch will introduce the slotsync_skip_reason column in
pg_replication_slots to capture the reason for skip.

Author: Shlok Kyal <shlok.kyal.oss@gmail.com>
Reviewed-by: shveta malik <shveta.malik@gmail.com>
Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Reviewed-by: Ashutosh Sharma <ashu.coek88@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/CAE9k0PkhfKrTEAsGz4DjOhEj1nQ+hbQVfvWUxNacD38ibW3a1g@mail.gmail.com
This commit is contained in:
Amit Kapila
2025-11-25 06:47:49 +00:00
parent c581c9a7ac
commit 76b78721ca
11 changed files with 212 additions and 42 deletions
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24
doc/src/sgml/monitoring.sgml
View File

@@ -1659,6 +1659,30 @@ 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>slotsync_skip_count</structfield><type>bigint</type>
</para>
<para>
Number of times the slot synchronization is skipped. Slot
synchronization occur only on standby servers and thus this column has
no meaning on the primary server.
</para>
</entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>slotsync_skip_at</structfield><type>timestamp with time zone</type>
</para>
<para>
Time at which last slot synchronization was skipped. Slot
synchronization occur only on standby servers and thus this column has
no meaning on the primary server.
</para>
</entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>stats_reset</structfield> <type>timestamp with time zone</type>