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| author | Bruce Momjian <bruce@momjian.us> | 2008-12-18 22:21:16 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2008-12-18 22:21:16 +0000 |
| commit | fa6116a3da725a5a1693917dccff1f2f0d892600 (patch) | |
| tree | cfd4e887782e358c32ea7a9831b9ca236074bfa5 | |
| parent | 4ac592be6c7ca089f302eb8787df44080ee2f8ee (diff) | |
| download | postgresql-fa6116a3da725a5a1693917dccff1f2f0d892600.tar.gz postgresql-fa6116a3da725a5a1693917dccff1f2f0d892600.zip | |
Clarify documentation that journaling is not required for WAL or data files.
| -rw-r--r-- | doc/src/sgml/wal.sgml | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/doc/src/sgml/wal.sgml b/doc/src/sgml/wal.sgml index e69463a9e22..a54fbc685e0 100644 --- a/doc/src/sgml/wal.sgml +++ b/doc/src/sgml/wal.sgml @@ -1,4 +1,4 @@ -<!-- $PostgreSQL: pgsql/doc/src/sgml/wal.sgml,v 1.55 2008/12/10 11:05:49 momjian Exp $ --> +<!-- $PostgreSQL: pgsql/doc/src/sgml/wal.sgml,v 1.56 2008/12/18 22:21:16 momjian Exp $ --> <chapter id="wal"> <title>Reliability and the Write-Ahead Log</title> @@ -138,8 +138,8 @@ <tip> <para> Because <acronym>WAL</acronym> restores database file - contents after a crash, it is not necessary to use a - journaled filesystem for reliability. In fact, journaling + contents after a crash, journaled filesystems are necessary for + reliable storage of the data files or WAL files. In fact, journaling overhead can reduce performance, especially if journaling causes file system <emphasis>data</emphasis> to be flushed to disk. Fortunately, data flushing during journaling can |