| From: | Kevin Grittner <kgrittn(at)ymail(dot)com> |
|---|---|
| To: | Toby Corkindale <toby(dot)corkindale(at)strategicdata(dot)com(dot)au>, Alban Hertroys <haramrae(at)gmail(dot)com> |
| Cc: | pgsql-general <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Many, many materialised views - Performance? |
| Date: | 2013-10-09 02:08:45 |
| Message-ID: | 1381284525.95722.YahooMailNeo@web162901.mail.bf1.yahoo.com |
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| Lists: | pgsql-general |
Toby Corkindale <toby(dot)corkindale(at)strategicdata(dot)com(dot)au> wrote:
> In this instance, we have a lot of queries that build certain aggregate
> results, which are very slow. The queries were initially all implemented
> as views, but then we started doing a type of materialising of our own,
> turning them into tables with CREATE TABLE AS SELECT ....
> This does make the results very fast to access now, but the side effect
> is a vast number of (very small) tables.
If you have multiple tables with identical layout but different
subsets of the data, you will probably get better performance by
putting them into a single table with indexes which allow you to
quickly search the smaller sets within the table.
--
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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