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Fix typo 233 pages -> 333 pages.

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This commit is contained in:
Bruce Momjian 2003-01-27 22:40:56 +00:00
parent 70fba70430
commit 9b9b14915b
1 changed files with 3 additions and 3 deletions
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doc/src/sgml/perform.sgml
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@ -1,5 +1,5 @@
<!-- <!--
$Header: /cvsroot/pgsql/doc/src/sgml/perform.sgml,v 1.24 2003/01/25 23:10:27 tgl Exp $ $Header: /cvsroot/pgsql/doc/src/sgml/perform.sgml,v 1.25 2003/01/27 22:40:56 momjian Exp $
--> -->
<chapter id="performance-tips"> <chapter id="performance-tips">
@ -109,8 +109,8 @@ regression=# EXPLAIN SELECT * FROM tenk1;
SELECT * FROM pg_class WHERE relname = 'tenk1'; SELECT * FROM pg_class WHERE relname = 'tenk1';
</programlisting> </programlisting>
you will find out that <classname>tenk1</classname> has 233 disk you will find out that <classname>tenk1</classname> has 333 disk
pages and 10000 rows. So the cost is estimated at 233 page pages and 10000 rows. So the cost is estimated at 333 page
reads, defined as costing 1.0 apiece, plus 10000 * <varname>cpu_tuple_cost</varname> which is 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>). currently 0.01 (try <command>SHOW cpu_tuple_cost</command>).
</para> </para>