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Commit59d6a75

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Avoid excessive Hot Standby feedback messages.
Without this patch, when wal_receiver_status_interval=0, indicating that nostatus messages should be sent, Hot Standby feedback messages are instead sentextremely frequently.Fujii Masao, with documentation changes by me.
1 parentc0b0076 commit59d6a75

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2 files changed

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‎doc/src/sgml/config.sgml

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@@ -2137,9 +2137,10 @@ SET ENABLE_SEQSCAN TO OFF;
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<para>
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Specifies whether or not a hot standby will send feedback to the primary
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about queries currently executing on the standby. This parameter can
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be used to eliminate query cancels caused by cleanup records, though
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it can cause database bloat on the primary for some workloads.
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The default value is <literal>off</literal>.
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be used to eliminate query cancels caused by cleanup records, but
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can cause database bloat on the primary for some workloads.
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The default value is <literal>off</literal>. Feedback messages will not
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be sent more frequently than once per <varname>wal_receiver_status_interval</>.
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</para>
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</listitem>
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</varlistentry>

‎src/backend/replication/walreceiver.c

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@@ -651,7 +651,7 @@ XLogWalRcvSendHSFeedback(void)
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* If the user doesn't want status to be reported to the master, be sure
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* to exit before doing anything at all.
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*/
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if (!hot_standby_feedback)
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if (wal_receiver_status_interval <=0||!hot_standby_feedback)
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return;
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/* Get current timestamp. */

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