Re: db growing out of proportion
От | Tomas Szepe |
---|---|
Тема | Re: db growing out of proportion |
Дата | |
Msg-id | 20030530230821.GG21944@louise.pinerecords.com обсуждение исходный текст |
Ответ на | Re: db growing out of proportion (Todd Nemanich <todd@twopunks.org>) |
Список | pgsql-bugs |
> [todd@twopunks.org] > > Additionally, you may want to take a look at your query performance. Are > most of your queries doing sequential scans? In my system, the crucial > columns of the primary tables are int8 and float8 fields. I have those > indexed, and I get a serious performance boost by making sure all > SELECT/UPDATE/DELETE queries that use those columns in the WHERE have an > explicit ::int8 or ::float8 (Explain analyze is your friend). During > peak usage, there is an order of magnitude difference (usually 10 to > 15x) between queries doing sequential scans on the table, and queries > doing index scans. Might be worth investigating if your queries are > taking 5 seconds when your DB is fresh. HTH. Yes, I have taken special care to fine-tune all queries on authentic data. The db setup works as expected in whatever respect with the exception of query times deterioration that apparently corelates to the db's on-disk size growth. Thanks for your suggestions, -- Tomas Szepe <szepe@pinerecords.com>
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