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Re: HOT - preliminary results

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 (view raw or flat)
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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