From 499abb0c0f21cb861c5af1d49a06469f3cfcc1eb Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Sat, 29 Sep 2001 04:02:27 +0000
Subject: Implement new 'lightweight lock manager' that's intermediate between
 existing lock manager and spinlocks: it understands exclusive vs shared lock
 but has few other fancy features.  Replace most uses of spinlocks with
 lightweight locks.  All remaining uses of spinlocks have very short lock hold
 times (a few dozen instructions), so tweak spinlock backoff code to work
 efficiently given this assumption.  All per my proposal on pghackers
 26-Sep-01.

---
 doc/src/sgml/wal.sgml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'doc/src')

diff --git a/doc/src/sgml/wal.sgml b/doc/src/sgml/wal.sgml
index 16f4e6c6eb4..3314088c1c2 100644
--- a/doc/src/sgml/wal.sgml
+++ b/doc/src/sgml/wal.sgml
@@ -1,4 +1,4 @@
-<!-- $Header: /cvsroot/pgsql/doc/src/sgml/wal.sgml,v 1.10 2001/09/22 03:59:17 momjian Exp $ -->
+<!-- $Header: /cvsroot/pgsql/doc/src/sgml/wal.sgml,v 1.11 2001/09/29 04:02:19 tgl Exp $ -->
 
 <chapter id="wal">
  <title>Write-Ahead Logging (<acronym>WAL</acronym>)</title>
@@ -146,7 +146,7 @@
   <para>
    The <acronym>WAL</acronym> buffers and control structure are in
    shared memory, and are handled by the backends; they are protected
-   by spinlocks.  The demand on shared memory is dependent on the
+   by lightweight locks.  The demand on shared memory is dependent on the
    number of buffers; the default size of the <acronym>WAL</acronym>
    buffers is 64 kB.
   </para>
-- 
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