diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index b60240e..7bfbc87 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -1882,50 +1882,6 @@ include_dir 'conf.d'
-
- Index Vacuum
-
-
- vacuum_cleanup_index_scale_factor (floating point)
-
- vacuum_cleanup_index_scale_factor configuration parameter
-
-
-
-
- Specifies the fraction of the total number of heap tuples counted in
- the previous statistics collection that can be inserted without
- incurring an index scan at the VACUUM cleanup stage.
- This setting currently applies to B-tree indexes only.
-
-
-
- If no tuples were deleted from the heap, B-tree indexes are still
- scanned at the VACUUM cleanup stage when at least one
- of the following conditions is met: the index statistics are stale, or
- the index contains deleted pages that can be recycled during cleanup.
- Index statistics are considered to be stale if the number of newly
- inserted tuples exceeds the vacuum_cleanup_index_scale_factor
- fraction of the total number of heap tuples detected by the previous
- statistics collection. The total number of heap tuples is stored in
- the index meta-page. Note that the meta-page does not include this data
- until VACUUM finds no dead tuples, so B-tree index
- scan at the cleanup stage can only be skipped if the second and
- subsequent VACUUM cycles detect no dead tuples.
-
-
-
- The value can range from 0 to 100.
- When vacuum_cleanup_index_scale_factor is set to
- 0, index scans are never skipped during
- VACUUM cleanup. The default value is 0.1.
-
-
-
-
-
-
-
Background Writer
@@ -7003,6 +6959,45 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
+
+ vacuum_cleanup_index_scale_factor (floating point)
+
+ vacuum_cleanup_index_scale_factor configuration parameter
+
+
+
+
+ Specifies the fraction of the total number of heap tuples counted in
+ the previous statistics collection that can be inserted without
+ incurring an index scan at the VACUUM cleanup stage.
+ This setting currently applies to B-tree indexes only.
+
+
+
+ If no tuples were deleted from the heap, B-tree indexes are still
+ scanned at the VACUUM cleanup stage when at least one
+ of the following conditions is met: the index statistics are stale, or
+ the index contains deleted pages that can be recycled during cleanup.
+ Index statistics are considered to be stale if the number of newly
+ inserted tuples exceeds the vacuum_cleanup_index_scale_factor
+ fraction of the total number of heap tuples detected by the previous
+ statistics collection. The total number of heap tuples is stored in
+ the index meta-page. Note that the meta-page does not include this data
+ until VACUUM finds no dead tuples, so B-tree index
+ scan at the cleanup stage can only be skipped if the second and
+ subsequent VACUUM cycles detect no dead tuples.
+
+
+
+ The value can range from 0 to 100.
+ When vacuum_cleanup_index_scale_factor is set to
+ 0, index scans are never skipped during
+ VACUUM cleanup. The default value is 0.1.
+
+
+
+
+
bytea_output (enum)
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index fa3c8a7..859ef93 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -3248,7 +3248,7 @@ static struct config_real ConfigureNamesReal[] =
},
{
- {"vacuum_cleanup_index_scale_factor", PGC_USERSET, AUTOVACUUM,
+ {"vacuum_cleanup_index_scale_factor", PGC_USERSET, CLIENT_CONN_STATEMENT,
gettext_noop("Number of tuple inserts prior to index cleanup as a fraction of reltuples."),
NULL
},
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index f43086f..9e39baf 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -575,6 +575,9 @@
#vacuum_freeze_table_age = 150000000
#vacuum_multixact_freeze_min_age = 5000000
#vacuum_multixact_freeze_table_age = 150000000
+#vacuum_cleanup_index_scale_factor = 0.1 # fraction of total number of tuples
+ # before index cleanup, 0 always performs
+ # index cleanup
#bytea_output = 'hex' # hex, escape
#xmlbinary = 'base64'
#xmloption = 'content'