diff options
| -rw-r--r-- | doc/src/sgml/storage.sgml | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/doc/src/sgml/storage.sgml b/doc/src/sgml/storage.sgml index 9b93ea5599b..9e19aa63e43 100644 --- a/doc/src/sgml/storage.sgml +++ b/doc/src/sgml/storage.sgml @@ -1,4 +1,4 @@ -<!-- $PostgreSQL: pgsql/doc/src/sgml/storage.sgml,v 1.26 2008/10/06 14:13:17 heikki Exp $ --> +<!-- $PostgreSQL: pgsql/doc/src/sgml/storage.sgml,v 1.27 2009/04/23 10:20:27 heikki Exp $ --> <chapter id="storage"> @@ -134,7 +134,9 @@ or index's <firstterm>filenode</> number, which can be found in main file (aka. main fork), a <firstterm>free space map</> (see <xref linkend="storage-fsm">) that stores information about free space available in the relation, is stored in a file named after the filenode -number, with the the <literal>_fsm</> suffix. +number, with the <literal>_fsm</> suffix. Tables also have a visibility map +fork, with the <literal>_vm</> suffix, to track which pages are known to have +no dead tuples and therefore need no vacuuming. </para> <caution> |