Re: HOT question - insert/delete

On Wed, May 20, 2009 at 9:01 PM, Merlin Moncure <mmoncure@gmail.com> 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.  if your table has a
> rolling set of data, for example a log file...you probably want to
> look at table partitioning (either manual or built in).
on that note, does HOT works in case I have TOASTed columns ? bytea,
varchar(), etc ?


--
GJ