Kevin Grittner wrote:
> Yeb Havinga <yebhavinga@gmail.com> wrote:
>
>
>> concerning gist indexes:
>>
>> 1) with larger block sizes and hence, larger # entries per gist
>> page, results in more generic keys of those pages. This in turn
>> results in a greater number of hits, when the index is queried, so
>> a larger part of the index is scanned. NB this has nothing to do
>> with caching / cache sizes; it holds for every IO model. Tests
>> performed by me showed performance improvements of over 200%.
>> Since then implementing a speedup has been on my 'want to do
>> list'.
>>
>
> As I recall, the better performance in your tests was with *smaller*
> GiST pages, right? (The above didn't seem entirely clear on that.)
>
Yes, making pages smaller made index scanning faster.
-- Yeb
