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Repair error apparently introduced in the initial coding of GUC: the

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default value for geqo_effort is supposed to be 40, not 1.  The actual
'genetic' component of the GEQO algorithm has been practically disabled
since 7.1 because of this mistake.  Improve documentation while at it.
This commit is contained in:
Tom Lane
2004-01-21 23:33:34 +00:00
parent 4d2e94ef04
commit 672a807028
5 changed files with 55 additions and 38 deletions
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22
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 1.177 2004/01/19 19:04:40 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.178 2004/01/21 23:33:34 tgl Exp $
*
*--------------------------------------------------------------------
*/
@ -931,23 +931,23 @@ static struct config_int ConfigureNamesInt[] =
&Geqo_pool_size,
DEFAULT_GEQO_POOL_SIZE, 0, MAX_GEQO_POOL_SIZE, NULL, NULL
},
{
{"geqo_effort", PGC_USERSET, QUERY_TUNING_GEQO,
gettext_noop("GEQO: effort is used to calculate a default for generations."),
NULL
},
&Geqo_effort,
1, 1, INT_MAX, NULL, NULL
},
{
{"geqo_generations", PGC_USERSET, QUERY_TUNING_GEQO,
gettext_noop("GEQO: number of iterations in the algorithm."),
gettext_noop("The number must be a positive integer. If 0 is "
gettext_noop("GEQO: number of iterations of the algorithm."),
gettext_noop("The value must be a positive integer. If 0 is "
"specified then effort * log2(poolsize) is used.")
},
&Geqo_generations,
0, 0, INT_MAX, NULL, NULL
},
{
{"geqo_effort", PGC_USERSET, QUERY_TUNING_GEQO,
gettext_noop("GEQO: effort is used to set the default for generations."),
NULL
},
&Geqo_effort,
DEFAULT_GEQO_EFFORT, MIN_GEQO_EFFORT, MAX_GEQO_EFFORT, NULL, NULL
},
{
{"deadlock_timeout", PGC_SIGHUP, LOCK_MANAGEMENT,