Re: HOT question - insert/delete
От | Simon Riggs |
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Тема | Re: HOT question - insert/delete |
Дата | |
Msg-id | 1242895057.27960.245.camel@ebony.2ndQuadrant обсуждение исходный текст |
Ответ на | Re: HOT question - insert/delete (Merlin Moncure <mmoncure@gmail.com>) |
Ответы |
Re: HOT question - insert/delete
|
Список | pgsql-general |
On Wed, 2009-05-20 at 16:01 -0400, Merlin Moncure wrote: > On Wed, May 20, 2009 at 3:11 PM, Gerhard Wiesinger <lists@wiesinger.com> wrote: > > Hello! > > > > Is HOT in 8.3 used in the following scenario: > > INSERT ... > > DELETE ... > > at the same ratio. > > > > So for example current data is added every minute and all old data older > > than 2 years are deleted. > > > > Would the heap be bloated or is this avoided by the HOT feature of 8.3 and > > nearly kept constant? > > HOT doesn't help here...it only helps with updates and then only if > you are updating fields that are not indexed. Partial vacuum, in 8.4, will deal with this situation, though partitioning does sound best for such clearly historical data. -- Simon Riggs www.2ndQuadrant.com PostgreSQL Training, Services and Support
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