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Commit79bc99a

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Convert effective_cache_size to an integer, for better integration with
upcoming units feature.
1 parent0c57c83 commit79bc99a

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4 files changed

+20
-20
lines changed

4 files changed

+20
-20
lines changed

‎doc/src/sgml/config.sgml‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.69 2006/07/25 03:51:21 tgl Exp $ -->
1+
<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.70 2006/07/26 11:35:55 petere Exp $ -->
22

33
<chapter Id="runtime-config">
44
<title>Server Configuration</title>
@@ -1856,7 +1856,7 @@ archive_command = 'copy "%p" /mnt/server/archivedir/"%f"' # Windows
18561856
</varlistentry>
18571857

18581858
<varlistentry id="guc-effective-cache-size" xreflabel="effective_cache_size">
1859-
<term><varname>effective_cache_size</varname> (<type>floating point</type>)</term>
1859+
<term><varname>effective_cache_size</varname> (<type>integer</type>)</term>
18601860
<indexterm>
18611861
<primary><varname>effective_cache_size</> configuration parameter</primary>
18621862
</indexterm>

‎src/backend/optimizer/path/costsize.c‎

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -54,7 +54,7 @@
5454
* Portions Copyright (c) 1994, Regents of the University of California
5555
*
5656
* IDENTIFICATION
57-
* $PostgreSQL: pgsql/src/backend/optimizer/path/costsize.c,v 1.163 2006/07/22 15:41:55 tgl Exp $
57+
* $PostgreSQL: pgsql/src/backend/optimizer/path/costsize.c,v 1.164 2006/07/26 11:35:56 petere Exp $
5858
*
5959
*-------------------------------------------------------------------------
6060
*/
@@ -92,7 +92,7 @@ doublecpu_tuple_cost = DEFAULT_CPU_TUPLE_COST;
9292
doublecpu_index_tuple_cost=DEFAULT_CPU_INDEX_TUPLE_COST;
9393
doublecpu_operator_cost=DEFAULT_CPU_OPERATOR_COST;
9494

95-
doubleeffective_cache_size=DEFAULT_EFFECTIVE_CACHE_SIZE;
95+
inteffective_cache_size=DEFAULT_EFFECTIVE_CACHE_SIZE;
9696

9797
Costdisable_cost=100000000.0;
9898

@@ -393,7 +393,7 @@ index_pages_fetched(double tuples_fetched, BlockNumber pages,
393393
T= (pages>1) ? (double)pages :1.0;
394394

395395
/* b is pro-rated share of effective_cache_size */
396-
b=effective_cache_size*T / (T+ (double)other_pages);
396+
b=(double)effective_cache_size*T / (T+ (double)other_pages);
397397
/* force it positive and integral */
398398
if (b <=1.0)
399399
b=1.0;

‎src/backend/utils/misc/guc.c‎

Lines changed: 12 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -10,7 +10,7 @@
1010
* Written by Peter Eisentraut <peter_e@gmx.net>.
1111
*
1212
* IDENTIFICATION
13-
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.329 2006/07/25 03:51:21 tgl Exp $
13+
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.330 2006/07/26 11:35:56 petere Exp $
1414
*
1515
*--------------------------------------------------------------------
1616
*/
@@ -1579,6 +1579,17 @@ static struct config_int ConfigureNamesInt[] =
15791579
0,0,INT_MAX,NULL,NULL
15801580
},
15811581

1582+
{
1583+
{"effective_cache_size",PGC_USERSET,QUERY_TUNING_COST,
1584+
gettext_noop("Sets the planner's assumption about size of the disk cache."),
1585+
gettext_noop("That is, the portion of the kernel's disk cache that "
1586+
"will be used for PostgreSQL data files. This is measured in disk "
1587+
"pages, which are normally 8 kB each.")
1588+
},
1589+
&effective_cache_size,
1590+
DEFAULT_EFFECTIVE_CACHE_SIZE,1,INT_MAX,NULL,NULL
1591+
},
1592+
15821593
/* End-of-list marker */
15831594
{
15841595
{NULL,0,0,NULL,NULL},NULL,0,0,0,NULL,NULL
@@ -1634,17 +1645,6 @@ static struct config_real ConfigureNamesReal[] =
16341645
DEFAULT_CPU_OPERATOR_COST,0,DBL_MAX,NULL,NULL
16351646
},
16361647

1637-
{
1638-
{"effective_cache_size",PGC_USERSET,QUERY_TUNING_COST,
1639-
gettext_noop("Sets the planner's assumption about size of the disk cache."),
1640-
gettext_noop("That is, the portion of the kernel's disk cache that "
1641-
"will be used for PostgreSQL data files. This is measured in disk "
1642-
"pages, which are normally 8 kB each.")
1643-
},
1644-
&effective_cache_size,
1645-
DEFAULT_EFFECTIVE_CACHE_SIZE,1,DBL_MAX,NULL,NULL
1646-
},
1647-
16481648
{
16491649
{"geqo_selection_bias",PGC_USERSET,QUERY_TUNING_GEQO,
16501650
gettext_noop("GEQO: selective pressure within the population."),

‎src/include/optimizer/cost.h‎

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/include/optimizer/cost.h,v 1.77 2006/07/22 15:41:56tgl Exp $
10+
* $PostgreSQL: pgsql/src/include/optimizer/cost.h,v 1.78 2006/07/26 11:35:56petere Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -27,7 +27,7 @@
2727
#defineDEFAULT_CPU_INDEX_TUPLE_COST 0.005
2828
#defineDEFAULT_CPU_OPERATOR_COST 0.0025
2929

30-
#defineDEFAULT_EFFECTIVE_CACHE_SIZE 1000.0/* measured in pages */
30+
#defineDEFAULT_EFFECTIVE_CACHE_SIZE 1000/* measured in pages */
3131

3232

3333
/*
@@ -41,7 +41,7 @@ extern DLLIMPORT double random_page_cost;
4141
externDLLIMPORTdoublecpu_tuple_cost;
4242
externDLLIMPORTdoublecpu_index_tuple_cost;
4343
externDLLIMPORTdoublecpu_operator_cost;
44-
externDLLIMPORTdoubleeffective_cache_size;
44+
externDLLIMPORTinteffective_cache_size;
4545
externCostdisable_cost;
4646
externboolenable_seqscan;
4747
externboolenable_indexscan;

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