Tom Lane wrote:
DelGurth <delgurth@xxxxxxxxx> writes:
As you can see we tried some indexes, to see if we could
get the queries on the views to become faster.
Indexes:
"mm_insrel_table_pkey" PRIMARY KEY, btree (number)
"mm_insrel_dir_not_one_idx" btree (dnumber, snumber) WHERE dir <> 1
"mm_insrel_dnumber_dir_not_one_idx" btree (dnumber) WHERE dir <> 1
"mm_insrel_full_idx" btree (snumber, dnumber, rnumber, dir) WHERE dir <>
1
"mm_insrel_relation_idx" btree (snumber, dnumber, rnumber)
Hmph ... it certainly appears to be choosing the wrong index in the
second case. I wonder why --- can you show the relpages and reltuples
stats from pg_class for these indexes?
Here they are:
relname | relpages | reltuples
-----------------------------------+----------+-----------
mm_insrel_dir_not_one_idx | 899 | 323628
mm_insrel_dnumber_dir_not_one_idx | 899 | 323628
mm_insrel_table_pkey | 1237 | 323628
mm_insrel_relation_idx | 1849 | 323628
mm_insrel_full_idx | 1260 | 323628
--
Alban Hertroys
alban@xxxxxxxxxxxxxxxxx
magproductions b.v.
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