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Add generic_plans and custom_plans fields into pg_prepared_statements.

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There was no easy way to find how many times generic and custom plans
have been executed for a prepared statement. This commit exposes those
numbers of times in pg_prepared_statements view.

Author: Atsushi Torikoshi, Kyotaro Horiguchi
Reviewed-by: Tatsuro Yamada, Masahiro Ikeda, Fujii Masao
Discussion: https://postgr.es/m/CACZ0uYHZ4M=NZpofH6JuPHeX=__5xcDELF8hT8_2T+R55w4RQw@mail.gmail.com
This commit is contained in:
Fujii Masao
2020-07-20 11:55:50 +09:00
parent 044dc7b964
commit d05b172a76
8 changed files with 105 additions and 16 deletions
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3
src/include/utils/plancache.h
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@@ -130,7 +130,8 @@ typedef struct CachedPlanSource
/* State kept to help decide whether to use custom or generic plans: */
double generic_cost; /* cost of generic plan, or -1 if not known */
double total_custom_cost; /* total cost of custom plans so far */
int num_custom_plans; /* number of plans included in total */
int64 num_custom_plans; /* # of custom plans included in total */
int64 num_generic_plans; /* # of generic plans */
} CachedPlanSource;
/*