From 0bcdef42f678e5a1bbf936d3315f1dce6bf06000 Mon Sep 17 00:00:00 2001
From: Kyotaro Horiguchi <horiguchi.kyotaro@lab.ntt.co.jp>
Date: Wed, 4 Jul 2018 11:44:31 +0900
Subject: [PATCH 4/6] Documentation update

Remove all description on pg_stat_tmp directory from documentation.
---
 doc/src/sgml/backup.sgml        |  4 +---
 doc/src/sgml/config.sgml        | 19 -------------------
 doc/src/sgml/func.sgml          |  3 +--
 doc/src/sgml/monitoring.sgml    |  7 +------
 doc/src/sgml/protocol.sgml      |  2 +-
 doc/src/sgml/ref/pg_rewind.sgml |  3 +--
 doc/src/sgml/storage.sgml       |  6 ------
 7 files changed, 5 insertions(+), 39 deletions(-)

diff --git a/doc/src/sgml/backup.sgml b/doc/src/sgml/backup.sgml
index 3fa5efdd78..31e94c1fe9 100644
--- a/doc/src/sgml/backup.sgml
+++ b/doc/src/sgml/backup.sgml
@@ -1116,11 +1116,9 @@ SELECT pg_stop_backup();
    <para>
     The contents of the directories <filename>pg_dynshmem/</filename>,
     <filename>pg_notify/</filename>, <filename>pg_serial/</filename>,
-    <filename>pg_snapshots/</filename>, <filename>pg_stat_tmp/</filename>,
+    <filename>pg_snapshots/</filename>,
     and <filename>pg_subtrans/</filename> (but not the directories themselves) can be
     omitted from the backup as they will be initialized on postmaster startup.
-    If <xref linkend="guc-stats-temp-directory"/> is set and is under the data
-    directory then the contents of that directory can also be omitted.
    </para>
 
    <para>
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 5b913f00c1..8430c1a3cb 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -6081,25 +6081,6 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
       </listitem>
      </varlistentry>
 
-     <varlistentry id="guc-stats-temp-directory" xreflabel="stats_temp_directory">
-      <term><varname>stats_temp_directory</varname> (<type>string</type>)
-      <indexterm>
-       <primary><varname>stats_temp_directory</varname> configuration parameter</primary>
-      </indexterm>
-      </term>
-      <listitem>
-       <para>
-        Sets the directory to store temporary statistics data in. This can be
-        a path relative to the data directory or an absolute path. The default
-        is <filename>pg_stat_tmp</filename>. Pointing this at a RAM-based
-        file system will decrease physical I/O requirements and can lead to
-        improved performance.
-        This parameter can only be set in the <filename>postgresql.conf</filename>
-        file or on the server command line.
-       </para>
-      </listitem>
-     </varlistentry>
-
      </variablelist>
     </sect2>
 
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index edc9be92a6..a01f68e99b 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -15889,8 +15889,7 @@ SELECT * FROM pg_ls_dir('.') WITH ORDINALITY AS t(ls,n);
  PG_VERSION      | 15
  pg_wal          | 16
  pg_hba.conf     | 17
- pg_stat_tmp     | 18
- pg_subtrans     | 19
+ pg_subtrans     | 18
 (19 rows)
 </programlisting>
   </para>
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
index 36d393d329..f23dd2aaa0 100644
--- a/doc/src/sgml/monitoring.sgml
+++ b/doc/src/sgml/monitoring.sgml
@@ -197,12 +197,7 @@ postgres   27093  0.0  0.0  30096  2752 ?        Ss   11:34   0:00 postgres: ser
 
   <para>
    The statistics collector transmits the collected information to other
-   <productname>PostgreSQL</productname> processes through temporary files.
-   These files are stored in the directory named by the
-   <xref linkend="guc-stats-temp-directory"/> parameter,
-   <filename>pg_stat_tmp</filename> by default.
-   For better performance, <varname>stats_temp_directory</varname> can be
-   pointed at a RAM-based file system, decreasing physical I/O requirements.
+   <productname>PostgreSQL</productname> processes through shared memory.
    When the server shuts down cleanly, a permanent copy of the statistics
    data is stored in the <filename>pg_stat</filename> subdirectory, so that
    statistics can be retained across server restarts.  When recovery is
diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
index cfc805f785..4b8ea2a6b8 100644
--- a/doc/src/sgml/protocol.sgml
+++ b/doc/src/sgml/protocol.sgml
@@ -2624,7 +2624,7 @@ The commands accepted in replication mode are:
         <para>
          <filename>pg_dynshmem</filename>, <filename>pg_notify</filename>,
          <filename>pg_replslot</filename>, <filename>pg_serial</filename>,
-         <filename>pg_snapshots</filename>, <filename>pg_stat_tmp</filename>, and
+         <filename>pg_snapshots</filename>, and
          <filename>pg_subtrans</filename> are copied as empty directories (even if
          they are symbolic links).
         </para>
diff --git a/doc/src/sgml/ref/pg_rewind.sgml b/doc/src/sgml/ref/pg_rewind.sgml
index 520d843f0e..416cb0f4f5 100644
--- a/doc/src/sgml/ref/pg_rewind.sgml
+++ b/doc/src/sgml/ref/pg_rewind.sgml
@@ -234,8 +234,7 @@ PostgreSQL documentation
       (everything except the relation files). Similarly to base backups,
       the contents of the directories <filename>pg_dynshmem/</filename>,
       <filename>pg_notify/</filename>, <filename>pg_replslot/</filename>,
-      <filename>pg_serial/</filename>, <filename>pg_snapshots/</filename>,
-      <filename>pg_stat_tmp/</filename>, and
+      <filename>pg_serial/</filename>, <filename>pg_snapshots/</filename>, and
       <filename>pg_subtrans/</filename> are omitted from the data copied
       from the source cluster. Any file or directory beginning with
       <filename>pgsql_tmp</filename> is omitted, as well as are
diff --git a/doc/src/sgml/storage.sgml b/doc/src/sgml/storage.sgml
index 8ef2ac8010..5ee7493970 100644
--- a/doc/src/sgml/storage.sgml
+++ b/doc/src/sgml/storage.sgml
@@ -120,12 +120,6 @@ Item
   subsystem</entry>
 </row>
 
-<row>
- <entry><filename>pg_stat_tmp</filename></entry>
- <entry>Subdirectory containing temporary files for the statistics
-  subsystem</entry>
-</row>
-
 <row>
  <entry><filename>pg_subtrans</filename></entry>
  <entry>Subdirectory containing subtransaction status data</entry>
-- 
2.16.3