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doc: Improve wording of section for repslot statistics 

This documentation has been added in 9868167, so no backpatch is
needed.

Author: Justin Pryzby, Michael Paquier
Discussion: https://postgr.es/m/20201222041153.GK30237@telsasoft.com
This commit is contained in:
Michael Paquier 2021-01-29 14:24:49 +09:00
parent 24843297a9
commit 2a5862f013
1 changed files with 20 additions and 20 deletions
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40
doc/src/sgml/monitoring.sgml
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@ -317,7 +317,7 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
<row>
<entry><structname>pg_stat_replication_slots</structname><indexterm><primary>pg_stat_replication_slots</primary></indexterm></entry>
<entry>One row per replication slot, showing statistics about
replication slot usage.
the replication slot's usage.
See <link linkend="monitoring-pg-stat-replication-slots-view">
<structname>pg_stat_replication_slots</structname></link> for details.
</entry>
@ -2604,10 +2604,10 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
<structfield>spill_txns</structfield> <type>bigint</type>
</para>
<para>
Number of transactions spilled to disk after the memory used by
logical decoding of changes from WAL for this slot exceeds
Number of transactions spilled to disk once the memory used by
logical decoding to decode changes from WAL has exceeded
<literal>logical_decoding_work_mem</literal>. The counter gets
incremented both for toplevel transactions and subtransactions.
incremented for both toplevel transactions and subtransactions.
</para></entry>
</row>
@ -2616,9 +2616,10 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
<structfield>spill_count</structfield> <type>bigint</type>
</para>
<para>
Number of times transactions were spilled to disk while decoding changes
from WAL for this slot. Transactions may get spilled repeatedly, and
this counter gets incremented on every such invocation.
Number of times transactions were spilled to disk while decoding
changes from WAL for this slot. This counter is incremented each time
a transaction is spilled, and the same transaction may be spilled
multiple times.
</para></entry>
</row>
@ -2639,11 +2640,12 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
<structfield>stream_txns</structfield> <type>bigint</type>
</para>
<para>
Number of in-progress transactions streamed to the decoding output plugin
after the memory used by logical decoding of changes from WAL for this
slot exceeds <literal>logical_decoding_work_mem</literal>. Streaming only
Number of in-progress transactions streamed to the decoding output
plugin after the memory used by logical decoding to decode changes
from WAL for this slot has exceeded
<literal>logical_decoding_work_mem</literal>. Streaming only
works with toplevel transactions (subtransactions can't be streamed
independently), so the counter does not get incremented for subtransactions.
independently), so the counter is not incremented for subtransactions.
</para></entry>
</row>
@ -2653,9 +2655,9 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
</para>
<para>
Number of times in-progress transactions were streamed to the decoding
output plugin while decoding changes from WAL for this slot. Transactions
may get streamed repeatedly, and this counter gets incremented on every
such invocation.
output plugin while decoding changes from WAL for this slot. This
counter is incremented each time a transaction is streamed, and the
same transaction may be streamed multiple times.
</para></entry>
</row>
@ -5042,7 +5044,7 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
</row>
<row>
<entry role="func_table_entry"><para role="func_signature">
<entry role="func_table_entry"><para role="func_signature">
<indexterm>
<primary>pg_stat_reset_replication_slot</primary>
</indexterm>
@ -5050,11 +5052,9 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
<returnvalue>void</returnvalue>
</para>
<para>
Resets statistics to zero for a single replication slot, or for all
replication slots in the cluster. The argument can be either the name
of the slot to reset the stats or NULL. If the argument is NULL, all
counters shown in the <structname>pg_stat_replication_slots</structname>
view for all replication slots are reset.
Resets statistics of the replication slot defined by the argument. If
the argument is <literal>NULL</literal>, resets statistics for all
the replication slots.
</para>
<para>
This function is restricted to superusers by default, but other users