Re: Table PARTITION

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От Richard Huxton
Тема Re: Table PARTITION
Дата
Msg-id 4255299B.3080101@archonet.com
обсуждение исходный текст
Ответ на Re: Table PARTITION  (Sean Davis <sdavis2@mail.nih.gov>)
Ответы Re: Table PARTITION  (Enrico Weigelt <weigelt@metux.de>)
Список pgsql-sql
Sean Davis wrote:
> This is a totally selfish question, but IF someone has a few minutes, 
> could he/she explain why table partitioning is such an important tool?

Say you have a large log-table, you could partition it by month. If most 
queries only search the last month or two, a lot of your partitioned 
data could be moved to cheaper/slower disks (via tablespaces).

After (say) 24 months, you can start dropping the oldest partitions, and 
this should take place without affecting any other partitions.

How you partition your data depends on how you plan to access it. If you 
don't query your log-tables by date there's not much point in 
partitioning by date.
--  Richard Huxton  Archonet Ltd


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