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Increase the default value of cpu_index_tuple_cost from 0.001 to 0.005.

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This shouldn't affect simple indexscans much, while for bitmap scans that
are touching a lot of index rows, this seems to bring the estimates more
in line with reality.  Per recent discussion.
This commit is contained in:
Tom Lane
2006-06-05 03:03:42 +00:00
parent eed6c9ed7e
commit e4de635a2b
3 changed files with 5 additions and 5 deletions
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src/backend/utils/misc/postgresql.conf.sample
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@ -178,7 +178,7 @@
#seq_page_cost = 1.0 # measured on an arbitrary scale
#random_page_cost = 4.0 # same scale as above
#cpu_tuple_cost = 0.01 # same scale as above
#cpu_index_tuple_cost = 0.001 # same scale as above
#cpu_index_tuple_cost = 0.005 # same scale as above
#cpu_operator_cost = 0.0025 # same scale as above
#effective_cache_size = 1000 # typically 8KB each