| From: | Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> |
|---|---|
| To: | KONDO Mitsumasa <kondo(dot)mitsumasa(at)lab(dot)ntt(dot)co(dot)jp> |
| Cc: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: gaussian distribution pgbench |
| Date: | 2014-03-14 07:00:56 |
| Message-ID: | alpine.DEB.2.10.1403140758320.4831@sto |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
> Well, when we set '--gaussian=NUM' or '--exponential=NUM' on command line, we
> can see access probability of top N records in result of final output. This
> out put is under following,
Indeed. I had forgotten this point. This is a significant information that
I would not like to loose.
> This feature helps user to understand bias of distribution for tuning
> threshold parameter.
> If this feature is nothing, it is difficult to understand distribution of
> access pattern, and it cannot realized on custom script. Because range of
> distribution (min, max, and SQL pattern) are unknown on custom script. So I
> think present UI is not bad and should not change.
Ok. I agree with this argument.
--
Fabien.
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