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| author | Bruce Momjian <bruce@momjian.us> | 2002-12-06 05:17:03 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2002-12-06 05:17:03 +0000 |
| commit | 982b26c0a935a79f973181a40bf4448e2859cdfe (patch) | |
| tree | 4ae48436fbd91d632576ff63d11f2b122568d1aa /doc/src | |
| parent | a2bd3e208591b49b8cbd770039ad7658d25218c4 (diff) | |
| download | postgresql-982b26c0a935a79f973181a40bf4448e2859cdfe.tar.gz postgresql-982b26c0a935a79f973181a40bf4448e2859cdfe.zip | |
RANDOM_PAGE_COST clarification of docs.
Joseph Shraibman
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/runtime.sgml | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml index b1c96d9824c..8821835b1b5 100644 --- a/doc/src/sgml/runtime.sgml +++ b/doc/src/sgml/runtime.sgml @@ -1,5 +1,5 @@ <!-- -$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.160 2002/12/04 21:43:07 momjian Exp $ +$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.161 2002/12/06 05:17:03 momjian Exp $ --> <Chapter Id="runtime"> @@ -841,7 +841,9 @@ env PGOPTIONS='-c geqo=off' psql <para> Sets the query optimizer's estimate of the cost of a nonsequentially fetched disk page. This is measured as a - multiple of the cost of a sequential page fetch. + multiple of the cost of a sequential page fetch. A higher + value makes it more likely a sequential scan will be used, + a lower value makes it more likely an index scan will be used. </para> </listitem> </varlistentry> |