0001-Autovacuum-tables-that-have-received-only-inserts.v3.patch

From 4eb99e65fadb8a2180d405d1fa5081205eff2d54 Mon Sep 17 00:00:00 2001
From: Laurenz Albe <laurenz.albe@cybertec.at>
Date: Thu, 5 Mar 2020 14:53:43 +0100
Subject: [PATCH] Autovacuum tables that have received only inserts

Add "autovacuum_vacuum_insert_threshold" GUC and reloption
with a default value of 10000000.

Any table that has received more inserts since it was
last vacuumed (and that is not vacuumed for another
reason) will be autovacuumed with the options
"index_cleanup off, freeze".

This avoids the known problem that insert-only tables
are never autovacuumed until they need to have their
anti-wraparound autovacuum, which then can be massive
and disruptive.

To track the number of inserts since the last vacuum,
introduce a StatTabEntry "inserts_since_vacuum" that
gets reset to 0 after a vacuum.  This value is available
in "pg_stat_*_tables" as "n_ins_since_vacuum".
---
 doc/src/sgml/config.sgml                      | 20 +++++++++
 doc/src/sgml/maintenance.sgml                 | 10 +++++
 doc/src/sgml/monitoring.sgml                  |  5 +++
 doc/src/sgml/ref/create_table.sgml            | 15 +++++++
 src/backend/access/common/reloptions.c        | 11 +++++
 src/backend/catalog/system_views.sql          |  1 +
 src/backend/postmaster/autovacuum.c           | 41 +++++++++++++++----
 src/backend/postmaster/pgstat.c               |  5 +++
 src/backend/utils/adt/pgstatfuncs.c           | 16 ++++++++
 src/backend/utils/misc/guc.c                  |  9 ++++
 src/backend/utils/misc/postgresql.conf.sample |  2 +
 src/bin/psql/tab-complete.c                   |  2 +
 src/include/catalog/pg_proc.dat               |  5 +++
 src/include/pgstat.h                          |  1 +
 src/include/postmaster/autovacuum.h           |  1 +
 src/include/utils/rel.h                       |  1 +
 16 files changed, 138 insertions(+), 7 deletions(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index c1128f89ec..32016c7403 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -7244,6 +7244,26 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
       </listitem>
      </varlistentry>
 
+     <varlistentry id="guc-autovacuum-vacuum-insert-threshold" xreflabel="autovacuum_vacuum_insert_threshold">
+      <term><varname>autovacuum_vacuum_insert_threshold</varname> (<type>integer</type>)
+      <indexterm>
+       <primary><varname>autovacuum_vacuum_insert_threshold</varname></primary>
+       <secondary>configuration parameter</secondary>
+      </indexterm>
+      </term>
+      <listitem>
+       <para>
+        Specifies the number of inserted tuples needed to trigger a
+        <command>VACUUM</command> in any one table.
+        The default is 10000000 tuples.
+        This parameter can only be set in the <filename>postgresql.conf</filename>
+        file or on the server command line;
+        but the setting can be overridden for individual tables by
+        changing table storage parameters.
+       </para>
+      </listitem>
+     </varlistentry>
+
      <varlistentry id="guc-autovacuum-analyze-threshold" xreflabel="autovacuum_analyze_threshold">
       <term><varname>autovacuum_analyze_threshold</varname> (<type>integer</type>)
       <indexterm>
diff --git a/doc/src/sgml/maintenance.sgml b/doc/src/sgml/maintenance.sgml
index ec8bdcd7a4..9d1ef87db2 100644
--- a/doc/src/sgml/maintenance.sgml
+++ b/doc/src/sgml/maintenance.sgml
@@ -788,6 +788,16 @@ vacuum threshold = vacuum base threshold + vacuum scale factor * number of tuple
     since the last vacuum are scanned.
    </para>
 
+   <para>
+    Tables that have received more than
+    <xref linkend="guc-autovacuum-vacuum-insert-threshold"/>
+    inserts since they were last vacuumed and are not eligible for vacuuming
+    based on the above criteria will be vacuumed to reduce the impact of a future
+    anti-wraparound vacuum run.
+    Such a vacuum will aggressively freeze tuples, and it will not clean up dead
+    index tuples.
+   </para>
+
    <para>
     For analyze, a similar condition is used: the threshold, defined as:
 <programlisting>
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
index 87586a7b06..05fd6260b7 100644
--- a/doc/src/sgml/monitoring.sgml
+++ b/doc/src/sgml/monitoring.sgml
@@ -2837,6 +2837,11 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
      <entry><type>bigint</type></entry>
      <entry>Estimated number of rows modified since this table was last analyzed</entry>
     </row>
+    <row>
+     <entry><structfield>n_ins_since_vacuum</structfield></entry>
+     <entry><type>bigint</type></entry>
+     <entry>Estimated number of rows inserted since this table was last vacuumed</entry>
+    </row>
     <row>
      <entry><structfield>last_vacuum</structfield></entry>
      <entry><type>timestamp with time zone</type></entry>
diff --git a/doc/src/sgml/ref/create_table.sgml b/doc/src/sgml/ref/create_table.sgml
index 4a2b6f0dae..243e674b09 100644
--- a/doc/src/sgml/ref/create_table.sgml
+++ b/doc/src/sgml/ref/create_table.sgml
@@ -1460,6 +1460,21 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
     </listitem>
    </varlistentry>
 
+   <varlistentry id="reloption-autovacuum-vacuum-insert-threshold" xreflabel="autovacuum_vacuum_insert_threshold">
+    <term><literal>autovacuum_vacuum_insert_threshold</literal>, <literal>toast.autovacuum_vacuum_insert_threshold</literal> (<type>integer</type>)
+    <indexterm>
+     <primary><varname>autovacuum_vacuum_insert_threshold</varname></primary>
+     <secondary>storage parameter</secondary>
+    </indexterm>
+    </term>
+    <listitem>
+     <para>
+      Per-table value for <xref linkend="guc-autovacuum-vacuum-insert-threshold"/>
+      parameter.
+     </para>
+    </listitem>
+   </varlistentry>
+
    <varlistentry id="reloption-autovacuum-vauum-scale-factor" xreflabel="autovacuum_vacuum_scale_factor">
     <term><literal>autovacuum_vacuum_scale_factor</literal>, <literal>toast.autovacuum_vacuum_scale_factor</literal> (<type>float4</type>)
     <indexterm>
diff --git a/src/backend/access/common/reloptions.c b/src/backend/access/common/reloptions.c
index 5325dd3f61..5a7cfa980b 100644
--- a/src/backend/access/common/reloptions.c
+++ b/src/backend/access/common/reloptions.c
@@ -233,6 +233,15 @@ static relopt_int intRelOpts[] =
 		},
 		-1, 0, INT_MAX
 	},
+	{
+		{
+			"autovacuum_vacuum_insert_threshold",
+			"Number of tuple inserts prior to vacuum",
+			RELOPT_KIND_HEAP | RELOPT_KIND_TOAST,
+			ShareUpdateExclusiveLock
+		},
+		-1, 0, INT_MAX
+	},
 	{
 		{
 			"autovacuum_analyze_threshold",
@@ -1501,6 +1510,8 @@ default_reloptions(Datum reloptions, bool validate, relopt_kind kind)
 		offsetof(StdRdOptions, autovacuum) + offsetof(AutoVacOpts, enabled)},
 		{"autovacuum_vacuum_threshold", RELOPT_TYPE_INT,
 		offsetof(StdRdOptions, autovacuum) + offsetof(AutoVacOpts, vacuum_threshold)},
+		{"autovacuum_vacuum_insert_threshold", RELOPT_TYPE_INT,
+		offsetof(StdRdOptions, autovacuum) + offsetof(AutoVacOpts, vacuum_ins_threshold)},
 		{"autovacuum_analyze_threshold", RELOPT_TYPE_INT,
 		offsetof(StdRdOptions, autovacuum) + offsetof(AutoVacOpts, analyze_threshold)},
 		{"autovacuum_vacuum_cost_limit", RELOPT_TYPE_INT,
diff --git a/src/backend/catalog/system_views.sql b/src/backend/catalog/system_views.sql
index f681aafcf9..b2729f1771 100644
--- a/src/backend/catalog/system_views.sql
+++ b/src/backend/catalog/system_views.sql
@@ -573,6 +573,7 @@ CREATE VIEW pg_stat_all_tables AS
             pg_stat_get_live_tuples(C.oid) AS n_live_tup,
             pg_stat_get_dead_tuples(C.oid) AS n_dead_tup,
             pg_stat_get_mod_since_analyze(C.oid) AS n_mod_since_analyze,
+            pg_stat_get_ins_since_vacuum(C.oid) AS n_ins_since_vacuum,
             pg_stat_get_last_vacuum_time(C.oid) as last_vacuum,
             pg_stat_get_last_autovacuum_time(C.oid) as last_autovacuum,
             pg_stat_get_last_analyze_time(C.oid) as last_analyze,
diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index e3a43d3296..11f2bbd0a7 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -116,6 +116,7 @@ int			autovacuum_max_workers;
 int			autovacuum_work_mem = -1;
 int			autovacuum_naptime;
 int			autovacuum_vac_thresh;
+int			autovacuum_vac_ins_thresh;
 double		autovacuum_vac_scale;
 int			autovacuum_anl_thresh;
 double		autovacuum_anl_scale;
@@ -330,7 +331,8 @@ static void relation_needs_vacanalyze(Oid relid, AutoVacOpts *relopts,
 									  Form_pg_class classForm,
 									  PgStat_StatTabEntry *tabentry,
 									  int effective_multixact_freeze_max_age,
-									  bool *dovacuum, bool *doanalyze, bool *wraparound);
+									  bool *dovacuum, bool *doanalyze, bool *wraparound,
+									  bool *insert_only);
 
 static void autovacuum_do_vac_analyze(autovac_table *tab,
 									  BufferAccessStrategy bstrategy);
@@ -2056,6 +2058,7 @@ do_autovacuum(void)
 		bool		dovacuum;
 		bool		doanalyze;
 		bool		wraparound;
+		bool		insert_only;
 
 		if (classForm->relkind != RELKIND_RELATION &&
 			classForm->relkind != RELKIND_MATVIEW)
@@ -2096,7 +2099,8 @@ do_autovacuum(void)
 		/* Check if it needs vacuum or analyze */
 		relation_needs_vacanalyze(relid, relopts, classForm, tabentry,
 								  effective_multixact_freeze_max_age,
-								  &dovacuum, &doanalyze, &wraparound);
+								  &dovacuum, &doanalyze, &wraparound,
+								  &insert_only);
 
 		/* Relations that need work are added to table_oids */
 		if (dovacuum || doanalyze)
@@ -2149,6 +2153,7 @@ do_autovacuum(void)
 		bool		dovacuum;
 		bool		doanalyze;
 		bool		wraparound;
+		bool		insert_only;
 
 		/*
 		 * We cannot safely process other backends' temp tables, so skip 'em.
@@ -2179,7 +2184,8 @@ do_autovacuum(void)
 
 		relation_needs_vacanalyze(relid, relopts, classForm, tabentry,
 								  effective_multixact_freeze_max_age,
-								  &dovacuum, &doanalyze, &wraparound);
+								  &dovacuum, &doanalyze, &wraparound,
+								  &insert_only);
 
 		/* ignore analyze for toast tables */
 		if (dovacuum)
@@ -2780,6 +2786,7 @@ table_recheck_autovac(Oid relid, HTAB *table_toast_map,
 	PgStat_StatDBEntry *shared;
 	PgStat_StatDBEntry *dbentry;
 	bool		wraparound;
+	bool		insert_only;
 	AutoVacOpts *avopts;
 
 	/* use fresh stats */
@@ -2816,7 +2823,8 @@ table_recheck_autovac(Oid relid, HTAB *table_toast_map,
 
 	relation_needs_vacanalyze(relid, avopts, classForm, tabentry,
 							  effective_multixact_freeze_max_age,
-							  &dovacuum, &doanalyze, &wraparound);
+							  &dovacuum, &doanalyze, &wraparound,
+							  &insert_only);
 
 	/* ignore ANALYZE for toast tables */
 	if (classForm->relkind == RELKIND_TOASTVALUE)
@@ -2885,11 +2893,11 @@ table_recheck_autovac(Oid relid, HTAB *table_toast_map,
 			(dovacuum ? VACOPT_VACUUM : 0) |
 			(doanalyze ? VACOPT_ANALYZE : 0) |
 			(!wraparound ? VACOPT_SKIP_LOCKED : 0);
-		tab->at_params.index_cleanup = VACOPT_TERNARY_DEFAULT;
+		tab->at_params.index_cleanup = insert_only ? VACOPT_TERNARY_DISABLED : VACOPT_TERNARY_DEFAULT;
 		tab->at_params.truncate = VACOPT_TERNARY_DEFAULT;
 		/* As of now, we don't support parallel vacuum for autovacuum */
 		tab->at_params.nworkers = -1;
-		tab->at_params.freeze_min_age = freeze_min_age;
+		tab->at_params.freeze_min_age = insert_only ? 0 : freeze_min_age;
 		tab->at_params.freeze_table_age = freeze_table_age;
 		tab->at_params.multixact_freeze_min_age = multixact_freeze_min_age;
 		tab->at_params.multixact_freeze_table_age = multixact_freeze_table_age;
@@ -2961,7 +2969,8 @@ relation_needs_vacanalyze(Oid relid,
  /* output params below */
 						  bool *dovacuum,
 						  bool *doanalyze,
-						  bool *wraparound)
+						  bool *wraparound,
+						  bool *insert_only)
 {
 	bool		force_vacuum;
 	bool		av_enabled;
@@ -2969,6 +2978,7 @@ relation_needs_vacanalyze(Oid relid,
 
 	/* constants from reloptions or GUC variables */
 	int			vac_base_thresh,
+				vac_ins_thresh,
 				anl_base_thresh;
 	float4		vac_scale_factor,
 				anl_scale_factor;
@@ -3005,6 +3015,10 @@ relation_needs_vacanalyze(Oid relid,
 		? relopts->vacuum_threshold
 		: autovacuum_vac_thresh;
 
+	vac_ins_thresh = (relopts && relopts->vacuum_ins_threshold >= 0)
+		? relopts->vacuum_ins_threshold
+		: autovacuum_vac_ins_thresh;
+
 	anl_scale_factor = (relopts && relopts->analyze_scale_factor >= 0)
 		? relopts->analyze_scale_factor
 		: autovacuum_anl_scale;
@@ -3023,6 +3037,9 @@ relation_needs_vacanalyze(Oid relid,
 
 	av_enabled = (relopts ? relopts->enabled : true);
 
+	/* process indexes by default */
+	*insert_only = false;
+
 	/* Force vacuum if table is at risk of wraparound */
 	xidForceLimit = recentXid - freeze_max_age;
 	if (xidForceLimit < FirstNormalTransactionId)
@@ -3076,6 +3093,16 @@ relation_needs_vacanalyze(Oid relid,
 		/* Determine if this table needs vacuum or analyze. */
 		*dovacuum = force_vacuum || (vactuples > vacthresh);
 		*doanalyze = (anltuples > anlthresh);
+		/*
+		 * If the number of inserted tuples exceeds the limit
+		 * and no vacuum is necessary for other reasons,
+		 * vacuum without cleaning up indexes.
+		 */
+		if (!(*dovacuum) && vac_ins_thresh < tabentry->inserts_since_vacuum)
+		{
+			*dovacuum = true;
+			*insert_only = true;
+		}
 	}
 	else
 	{
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 462b4d7e06..78bd5cf90d 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4791,6 +4791,7 @@ pgstat_get_tab_entry(PgStat_StatDBEntry *dbentry, Oid tableoid, bool create)
 		result->n_live_tuples = 0;
 		result->n_dead_tuples = 0;
 		result->changes_since_analyze = 0;
+		result->inserts_since_vacuum = 0;
 		result->blocks_fetched = 0;
 		result->blocks_hit = 0;
 		result->vacuum_timestamp = 0;
@@ -5921,6 +5922,7 @@ pgstat_recv_tabstat(PgStat_MsgTabstat *msg, int len)
 			tabentry->n_live_tuples = tabmsg->t_counts.t_delta_live_tuples;
 			tabentry->n_dead_tuples = tabmsg->t_counts.t_delta_dead_tuples;
 			tabentry->changes_since_analyze = tabmsg->t_counts.t_changed_tuples;
+			tabentry->inserts_since_vacuum = tabmsg->t_counts.t_tuples_inserted;
 			tabentry->blocks_fetched = tabmsg->t_counts.t_blocks_fetched;
 			tabentry->blocks_hit = tabmsg->t_counts.t_blocks_hit;
 
@@ -5950,10 +5952,12 @@ pgstat_recv_tabstat(PgStat_MsgTabstat *msg, int len)
 			{
 				tabentry->n_live_tuples = 0;
 				tabentry->n_dead_tuples = 0;
+				tabentry->inserts_since_vacuum = 0;
 			}
 			tabentry->n_live_tuples += tabmsg->t_counts.t_delta_live_tuples;
 			tabentry->n_dead_tuples += tabmsg->t_counts.t_delta_dead_tuples;
 			tabentry->changes_since_analyze += tabmsg->t_counts.t_changed_tuples;
+			tabentry->inserts_since_vacuum += tabmsg->t_counts.t_tuples_inserted;
 			tabentry->blocks_fetched += tabmsg->t_counts.t_blocks_fetched;
 			tabentry->blocks_hit += tabmsg->t_counts.t_blocks_hit;
 		}
@@ -6187,6 +6191,7 @@ pgstat_recv_vacuum(PgStat_MsgVacuum *msg, int len)
 
 	tabentry->n_live_tuples = msg->m_live_tuples;
 	tabentry->n_dead_tuples = msg->m_dead_tuples;
+	tabentry->inserts_since_vacuum = 0;
 
 	if (msg->m_autovacuum)
 	{
diff --git a/src/backend/utils/adt/pgstatfuncs.c b/src/backend/utils/adt/pgstatfuncs.c
index 7e6a3c1774..aac248a86e 100644
--- a/src/backend/utils/adt/pgstatfuncs.c
+++ b/src/backend/utils/adt/pgstatfuncs.c
@@ -196,6 +196,22 @@ pg_stat_get_mod_since_analyze(PG_FUNCTION_ARGS)
 }
 
 
+Datum
+pg_stat_get_ins_since_vacuum(PG_FUNCTION_ARGS)
+{
+	Oid			relid = PG_GETARG_OID(0);
+	int64		result;
+	PgStat_StatTabEntry *tabentry;
+
+	if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
+		result = 0;
+	else
+		result = (int64) (tabentry->inserts_since_vacuum);
+
+	PG_RETURN_INT64(result);
+}
+
+
 Datum
 pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS)
 {
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 464f264d9a..f692cefa03 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -3063,6 +3063,15 @@ static struct config_int ConfigureNamesInt[] =
 		50, 0, INT_MAX,
 		NULL, NULL, NULL
 	},
+	{
+		{"autovacuum_vacuum_insert_threshold", PGC_SIGHUP, AUTOVACUUM,
+			gettext_noop("Number of tuple inserts prior to vacuum."),
+			NULL
+		},
+		&autovacuum_vac_ins_thresh,
+		10000000, 0, INT_MAX,
+		NULL, NULL, NULL
+	},
 	{
 		{"autovacuum_analyze_threshold", PGC_SIGHUP, AUTOVACUUM,
 			gettext_noop("Minimum number of tuple inserts, updates, or deletes prior to analyze."),
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index e58e4788a8..8b6d0288f4 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -598,6 +598,8 @@
 #autovacuum_naptime = 1min		# time between autovacuum runs
 #autovacuum_vacuum_threshold = 50	# min number of row updates before
 					# vacuum
+#autovacuum_vacuum_insert_threshold = 10000000	# max number of row inserts before
+					# vacuum
 #autovacuum_analyze_threshold = 50	# min number of row updates before
 					# analyze
 #autovacuum_vacuum_scale_factor = 0.2	# fraction of table size before vacuum
diff --git a/src/bin/psql/tab-complete.c b/src/bin/psql/tab-complete.c
index b6b08d0ccb..fea178dc97 100644
--- a/src/bin/psql/tab-complete.c
+++ b/src/bin/psql/tab-complete.c
@@ -1071,6 +1071,7 @@ static const char *const table_storage_parameters[] = {
 	"autovacuum_multixact_freeze_table_age",
 	"autovacuum_vacuum_cost_delay",
 	"autovacuum_vacuum_cost_limit",
+	"autovacuum_vacuum_insert_threshold",
 	"autovacuum_vacuum_scale_factor",
 	"autovacuum_vacuum_threshold",
 	"fillfactor",
@@ -1085,6 +1086,7 @@ static const char *const table_storage_parameters[] = {
 	"toast.autovacuum_multixact_freeze_table_age",
 	"toast.autovacuum_vacuum_cost_delay",
 	"toast.autovacuum_vacuum_cost_limit",
+	"toast.autovacuum_vacuum_insert_threshold",
 	"toast.autovacuum_vacuum_scale_factor",
 	"toast.autovacuum_vacuum_threshold",
 	"toast.log_autovacuum_min_duration",
diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat
index 07a86c7b7b..0527b785a6 100644
--- a/src/include/catalog/pg_proc.dat
+++ b/src/include/catalog/pg_proc.dat
@@ -5129,6 +5129,11 @@
   proname => 'pg_stat_get_mod_since_analyze', provolatile => 's',
   proparallel => 'r', prorettype => 'int8', proargtypes => 'oid',
   prosrc => 'pg_stat_get_mod_since_analyze' },
+{ oid => '8872',
+  descr => 'statistics: number of tuples inserted since last vacuum',
+  proname => 'pg_stat_get_ins_since_vacuum', provolatile => 's',
+  proparallel => 'r', prorettype => 'int8', proargtypes => 'oid',
+  prosrc => 'pg_stat_get_ins_since_vacuum' },
 { oid => '1934', descr => 'statistics: number of blocks fetched',
   proname => 'pg_stat_get_blocks_fetched', provolatile => 's',
   proparallel => 'r', prorettype => 'int8', proargtypes => 'oid',
diff --git a/src/include/pgstat.h b/src/include/pgstat.h
index 3a65a51696..7ccbb3191e 100644
--- a/src/include/pgstat.h
+++ b/src/include/pgstat.h
@@ -646,6 +646,7 @@ typedef struct PgStat_StatTabEntry
 	PgStat_Counter n_live_tuples;
 	PgStat_Counter n_dead_tuples;
 	PgStat_Counter changes_since_analyze;
+	PgStat_Counter inserts_since_vacuum;
 
 	PgStat_Counter blocks_fetched;
 	PgStat_Counter blocks_hit;
diff --git a/src/include/postmaster/autovacuum.h b/src/include/postmaster/autovacuum.h
index d40ed55531..5798157874 100644
--- a/src/include/postmaster/autovacuum.h
+++ b/src/include/postmaster/autovacuum.h
@@ -32,6 +32,7 @@ extern int	autovacuum_max_workers;
 extern int	autovacuum_work_mem;
 extern int	autovacuum_naptime;
 extern int	autovacuum_vac_thresh;
+extern int	autovacuum_vac_ins_thresh;
 extern double autovacuum_vac_scale;
 extern int	autovacuum_anl_thresh;
 extern double autovacuum_anl_scale;
diff --git a/src/include/utils/rel.h b/src/include/utils/rel.h
index 44ed04dd3f..12d4c30146 100644
--- a/src/include/utils/rel.h
+++ b/src/include/utils/rel.h
@@ -252,6 +252,7 @@ typedef struct AutoVacOpts
 {
 	bool		enabled;
 	int			vacuum_threshold;
+	int			vacuum_ins_threshold;
 	int			analyze_threshold;
 	int			vacuum_cost_limit;
 	int			freeze_min_age;
-- 
2.21.1