From b910d7ea358b0134d170ebf4002248df25a5f244 Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Thu, 8 May 2014 21:11:47 -0400
Subject: Increase the default value of effective_cache_size to 4GB.

Per discussion, the old value of 128MB is ridiculously small on modern
machines; in fact, it's not even any larger than the default value of
shared_buffers, which it certainly should be.  Increase to 4GB, which
is unlikely to be any worse than the old default for anyone, and should
be noticeably better for most.  Eventually we might have an autotuning
scheme for this setting, but the recent attempt crashed and burned,
so for now just do this.
---
 doc/src/sgml/config.sgml      |  4 ++--
 doc/src/sgml/release-9.4.sgml | 18 +++++++++---------
 2 files changed, 11 insertions(+), 11 deletions(-)

(limited to 'doc/src')

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index bc5a8870444..d9e5985a16a 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3194,8 +3194,8 @@ include 'filename'
         memory allocated by <productname>PostgreSQL</productname>, nor
         does it reserve kernel disk cache; it is used only for estimation
         purposes.  The system also does not assume data remains in
-        the disk cache between queries.  The default is 128 megabytes
-        (<literal>128MB</>).
+        the disk cache between queries.  The default is 4 gigabytes
+        (<literal>4GB</>).
        </para>
       </listitem>
      </varlistentry>
diff --git a/doc/src/sgml/release-9.4.sgml b/doc/src/sgml/release-9.4.sgml
index 4e4f017e43c..21c6fc77f79 100644
--- a/doc/src/sgml/release-9.4.sgml
+++ b/doc/src/sgml/release-9.4.sgml
@@ -720,20 +720,12 @@
        </para>
       </listitem>
 
-      <listitem>
-       <para>
-        Auto-tune <link
-        linkend="guc-effective-cache-size"><varname>effective_cache_size</></link>
-        to be four-times shared buffers (Bruce Momjian, Tom Lane)
-       </para>
-      </listitem>
-
       <listitem>
        <para>
         Increase <link
         linkend="guc-work-mem"><varname>work_mem</></link> and <link
         linkend="guc-maintenance-work-mem"><varname>maintenance_work_mem</></link>
-        defaults by four-times (Bruce Momjian)
+        defaults by four times (Bruce Momjian)
        </para>
 
        <para>
@@ -741,6 +733,14 @@
        </para>
       </listitem>
 
+      <listitem>
+       <para>
+        Increase the default setting of <link
+        linkend="guc-effective-cache-size"><varname>effective_cache_size</></link>
+        to 4GB (Bruce Momjian, Tom Lane)
+       </para>
+      </listitem>
+
       <listitem>
        <para>
         Allow terabyte units to be specified for configuration variable
-- 
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