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Diffstat (limited to 'doc/src/sgml/perform.sgml')
| -rw-r--r-- | doc/src/sgml/perform.sgml | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/doc/src/sgml/perform.sgml b/doc/src/sgml/perform.sgml index 3c254abb64..5c2a959945 100644 --- a/doc/src/sgml/perform.sgml +++ b/doc/src/sgml/perform.sgml @@ -1,4 +1,4 @@ -<!-- $PostgreSQL: pgsql/doc/src/sgml/perform.sgml,v 1.62 2007/02/01 00:28:17 momjian Exp $ --> +<!-- $PostgreSQL: pgsql/doc/src/sgml/perform.sgml,v 1.63 2007/02/01 19:10:24 momjian Exp $ --> <chapter id="performance-tips"> <title>Performance Tips</title> @@ -437,7 +437,7 @@ EXPLAIN ANALYZE SELECT * FROM tenk1 t1, tenk2 t2 WHERE t1.unique1 < 100 AND t <para> It is worth noting that <command>EXPLAIN</> results should not be extrapolated to situations other than the one you are actually testing; for example, - results on a toy-sized table can't be assumed to apply to large tables. + results on a toy-sized table cannot be assumed to apply to large tables. The planner's cost estimates are not linear and so it might choose a different plan for a larger or smaller table. An extreme example is that on a table that only occupies one disk page, you'll nearly |