diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/src/sgml/perform.sgml | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/doc/src/sgml/perform.sgml b/doc/src/sgml/perform.sgml index 2e42d020e42..af7f855a50c 100644 --- a/doc/src/sgml/perform.sgml +++ b/doc/src/sgml/perform.sgml @@ -1,5 +1,5 @@ <!-- -$Header: /cvsroot/pgsql/doc/src/sgml/perform.sgml,v 1.25 2003/01/27 22:40:56 momjian Exp $ +$Header: /cvsroot/pgsql/doc/src/sgml/perform.sgml,v 1.26 2003/01/28 03:34:29 momjian Exp $ --> <chapter id="performance-tips"> @@ -109,8 +109,8 @@ regression=# EXPLAIN SELECT * FROM tenk1; SELECT * FROM pg_class WHERE relname = 'tenk1'; </programlisting> - you will find out that <classname>tenk1</classname> has 333 disk - pages and 10000 rows. So the cost is estimated at 333 page + you will find out that <classname>tenk1</classname> has 233 disk + pages and 10000 rows. So the cost is estimated at 233 page reads, defined as costing 1.0 apiece, plus 10000 * <varname>cpu_tuple_cost</varname> which is currently 0.01 (try <command>SHOW cpu_tuple_cost</command>). </para> |