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Convert effective_cache_size to an integer, for better integration with 

upcoming units feature.
This commit is contained in:
Peter Eisentraut 2006-07-26 11:35:56 +00:00
parent 0c57c832b9
commit 79bc99a467
4 changed files with 20 additions and 20 deletions
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4
doc/src/sgml/config.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.69 2006/07/25 03:51:21 tgl Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.70 2006/07/26 11:35:55 petere Exp $ -->
<chapter Id="runtime-config">
<title>Server Configuration</title>
@ -1856,7 +1856,7 @@ archive_command = 'copy "%p" /mnt/server/archivedir/"%f"' # Windows
</varlistentry>
<varlistentry id="guc-effective-cache-size" xreflabel="effective_cache_size">
<term><varname>effective_cache_size</varname> (<type>floating point</type>)</term>
<term><varname>effective_cache_size</varname> (<type>integer</type>)</term>
<indexterm>
<primary><varname>effective_cache_size</> configuration parameter</primary>
</indexterm>

6
src/backend/optimizer/path/costsize.c
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@ -54,7 +54,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/path/costsize.c,v 1.163 2006/07/22 15:41:55 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/path/costsize.c,v 1.164 2006/07/26 11:35:56 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -92,7 +92,7 @@ double cpu_tuple_cost = DEFAULT_CPU_TUPLE_COST;
double cpu_index_tuple_cost = DEFAULT_CPU_INDEX_TUPLE_COST;
double cpu_operator_cost = DEFAULT_CPU_OPERATOR_COST;
double effective_cache_size = DEFAULT_EFFECTIVE_CACHE_SIZE;
int effective_cache_size = DEFAULT_EFFECTIVE_CACHE_SIZE;
Cost disable_cost = 100000000.0;
@ -393,7 +393,7 @@ index_pages_fetched(double tuples_fetched, BlockNumber pages,
T = (pages > 1) ? (double) pages : 1.0;
/* b is pro-rated share of effective_cache_size */
b = effective_cache_size * T / (T + (double) other_pages);
b = (double) effective_cache_size * T / (T + (double) other_pages);
/* force it positive and integral */
if (b <= 1.0)
b = 1.0;

24
src/backend/utils/misc/guc.c
View File

@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.329 2006/07/25 03:51:21 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.330 2006/07/26 11:35:56 petere Exp $
*
*--------------------------------------------------------------------
*/
@ -1579,6 +1579,17 @@ static struct config_int ConfigureNamesInt[] =
0, 0, INT_MAX, NULL, NULL
},
{
{"effective_cache_size", PGC_USERSET, QUERY_TUNING_COST,
gettext_noop("Sets the planner's assumption about size of the disk cache."),
gettext_noop("That is, the portion of the kernel's disk cache that "
"will be used for PostgreSQL data files. This is measured in disk "
"pages, which are normally 8 kB each.")
},
&effective_cache_size,
DEFAULT_EFFECTIVE_CACHE_SIZE, 1, INT_MAX, NULL, NULL
},
/* End-of-list marker */
{
{NULL, 0, 0, NULL, NULL}, NULL, 0, 0, 0, NULL, NULL
@ -1634,17 +1645,6 @@ static struct config_real ConfigureNamesReal[] =
DEFAULT_CPU_OPERATOR_COST, 0, DBL_MAX, NULL, NULL
},
{
{"effective_cache_size", PGC_USERSET, QUERY_TUNING_COST,
gettext_noop("Sets the planner's assumption about size of the disk cache."),
gettext_noop("That is, the portion of the kernel's disk cache that "
"will be used for PostgreSQL data files. This is measured in disk "
"pages, which are normally 8 kB each.")
},
&effective_cache_size,
DEFAULT_EFFECTIVE_CACHE_SIZE, 1, DBL_MAX, NULL, NULL
},
{
{"geqo_selection_bias", PGC_USERSET, QUERY_TUNING_GEQO,
gettext_noop("GEQO: selective pressure within the population."),

6
src/include/optimizer/cost.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/optimizer/cost.h,v 1.77 2006/07/22 15:41:56 tgl Exp $
* $PostgreSQL: pgsql/src/include/optimizer/cost.h,v 1.78 2006/07/26 11:35:56 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -27,7 +27,7 @@
#define DEFAULT_CPU_INDEX_TUPLE_COST 0.005
#define DEFAULT_CPU_OPERATOR_COST 0.0025
#define DEFAULT_EFFECTIVE_CACHE_SIZE 1000.0 /* measured in pages */
#define DEFAULT_EFFECTIVE_CACHE_SIZE 1000 /* measured in pages */
/*
@ -41,7 +41,7 @@ extern DLLIMPORT double random_page_cost;
extern DLLIMPORT double cpu_tuple_cost;
extern DLLIMPORT double cpu_index_tuple_cost;
extern DLLIMPORT double cpu_operator_cost;
extern DLLIMPORT double effective_cache_size;
extern DLLIMPORT int effective_cache_size;
extern Cost disable_cost;
extern bool enable_seqscan;
extern bool enable_indexscan;