| From: | "Pavan Deolasee" <pavan(dot)deolasee(at)enterprisedb(dot)com> |
|---|---|
| To: | "Zeugswetter Andreas ADI SD" <ZeugswetterA(at)spardat(dot)at> |
| Cc: | <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: HOT - preliminary results |
| Date: | 2007-03-02 07:01:00 |
| Message-ID: | 45E7CBAC.9090100@enterprisedb.com |
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| Thread: | |
| Lists: | pgsql-hackers |
Zeugswetter Andreas ADI SD wrote:
>>> accounts 157895 (initial size) 49284 (increase)
>>> accounts_pkey 19709 (initial size) 19705 (increase)
>>>
>>>
>> Just to clarify, the relation size and increase is in number
>> of blocks.
>
> The numbers are quite impressive :-) Have you removed the selects on
> accounts too ?
Yes. In the first set of results, SELECT on accounts is removed.
> Seems that should also show improvements.
>
> Do you prune chains during update also ?
Yes, we do prune the chains during UPDATE, but only when we
run out of free space and LP_DELETEd items on the page.
And we prune all chains on the page in that case.
Thanks,
Pavan
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