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1 | 1 | <!-- |
2 | | -$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.160 2002/12/04 21:43:07 momjian Exp $ |
| 2 | +$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.161 2002/12/06 05:17:03 momjian Exp $ |
3 | 3 | --> |
4 | 4 |
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5 | 5 | <Chapter Id="runtime"> |
@@ -841,7 +841,9 @@ env PGOPTIONS='-c geqo=off' psql |
841 | 841 | <para> |
842 | 842 | Sets the query optimizer's estimate of the cost of a |
843 | 843 | nonsequentially fetched disk page. This is measured as a |
844 | | - multiple of the cost of a sequential page fetch. |
| 844 | + multiple of the cost of a sequential page fetch. A higher |
| 845 | + value makes it more likely a sequential scan will be used, |
| 846 | + a lower value makes it more likely an index scan will be used. |
845 | 847 | </para> |
846 | 848 | </listitem> |
847 | 849 | </varlistentry> |
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