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Diffstat (limited to 'doc/src/sgml/wal.sgml')
| -rw-r--r-- | doc/src/sgml/wal.sgml | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/doc/src/sgml/wal.sgml b/doc/src/sgml/wal.sgml index 090a133185..373aa961dc 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 1.52 2007/12/29 17:55:07 momjian Exp $ --> +<!-- $PostgreSQL: pgsql/doc/src/sgml/wal.sgml,v 1.53 2008/05/02 19:52:37 tgl Exp $ --> <chapter id="wal"> <title>Reliability and the Write-Ahead Log</title> @@ -487,8 +487,11 @@ <para> <acronym>WAL</acronym> logs are stored in the directory <filename>pg_xlog</filename> under the data directory, as a set of - segment files, normally each 16 MB in size. Each segment is divided into - pages, normally 8 kB each. The log record headers are described in + segment files, normally each 16 MB in size (but the size can be changed + by altering the <option>--with-wal-segsize</> configure option when + building the server). Each segment is divided into pages, normally + 8 kB each (this size can be changed via the <option>--with-wal-blocksize</> + configure option). The log record headers are described in <filename>access/xlog.h</filename>; the record content is dependent on the type of event that is being logged. Segment files are given ever-increasing numbers as names, starting at |