diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2001-09-29 04:02:27 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2001-09-29 04:02:27 +0000 |
| commit | 499abb0c0f21cb861c5af1d49a06469f3cfcc1eb (patch) | |
| tree | 0af6262d9b6d1159315e93e90e69047b959ea5f5 /doc/src | |
| parent | 818fb55ac49b4b20e65d9899fc1784e54e86db58 (diff) | |
| download | postgresql-499abb0c0f21cb861c5af1d49a06469f3cfcc1eb.tar.gz postgresql-499abb0c0f21cb861c5af1d49a06469f3cfcc1eb.zip | |
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.
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/wal.sgml | 4 |
1 files changed, 2 insertions, 2 deletions
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> |