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Add temp_buffers GUC variable to allow users to determine the size

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of the local buffer arena for temporary table access.
This commit is contained in:
Tom Lane
2005-03-19 23:27:11 +00:00
parent d65522aeb6
commit 91728fa26c
8 changed files with 89 additions and 28 deletions
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28
src/backend/utils/misc/guc.c
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@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.255 2005/03/13 09:36:31 neilc Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.256 2005/03/19 23:27:07 tgl Exp $
*
*--------------------------------------------------------------------
*/
@ -104,6 +104,7 @@ static const char *assign_log_error_verbosity(const char *newval, bool doit,
GucSource source);
static const char *assign_log_statement(const char *newval, bool doit,
GucSource source);
static const char *show_num_temp_buffers(void);
static bool assign_phony_autocommit(bool newval, bool doit, GucSource source);
static const char *assign_custom_variable_classes(const char *newval, bool doit,
GucSource source);
@ -144,9 +145,10 @@ bool default_with_oids = false;
int log_min_error_statement = PANIC;
int log_min_messages = NOTICE;
int client_min_messages = NOTICE;
int log_min_duration_statement = -1;
int num_temp_buffers = 1000;
char *ConfigFileName;
char *HbaFileName;
char *IdentFileName;
@ -966,6 +968,15 @@ static struct config_int ConfigureNamesInt[] =
1000, 16, INT_MAX / BLCKSZ, NULL, NULL
},
{
{"temp_buffers", PGC_USERSET, RESOURCES_MEM,
gettext_noop("Sets the maximum number of temporary buffers used by each session."),
NULL
},
&num_temp_buffers,
1000, 100, INT_MAX / BLCKSZ, NULL, show_num_temp_buffers
},
{
{"port", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
gettext_noop("Sets the TCP port the server listens on."),
@ -5496,6 +5507,19 @@ assign_log_statement(const char *newval, bool doit, GucSource source)
return newval; /* OK */
}
static const char *
show_num_temp_buffers(void)
{
/*
* We show the GUC var until local buffers have been initialized,
* and NLocBuffer afterwards.
*/
static char nbuf[32];
sprintf(nbuf, "%d", NLocBuffer ? NLocBuffer : num_temp_buffers);
return nbuf;
}
static bool
assign_phony_autocommit(bool newval, bool doit, GucSource source)
{