Horton

Re: [WIP] Zipfian distribution in pgbench

Alik Khilazhev <a.khilazhev@postgrespro.ru>

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From: Alik Khilazhev <a.khilazhev@postgrespro.ru>
To: Fabien COELHO <coelho@cri.ensmp.fr>
Cc: PostgreSQL Developers <pgsql-hackers@postgresql.org>
Date: 2017-07-21T08:43:31Z
Lists: pgsql-hackers 
> Hmmm. On second thought, maybe one or the other is enough, either restrict the parameter to values where the approximation is good, or put out a clear documentation about when the approximation is not very good, but it may be still useful even if not precise.
> 
> So I would be in favor of expanding the documentation but not restricting the parameter beyond avoiding value 1.0.

I have removed restriction and expanded documentation in attaching patch v5. 

Also I have recorded patch to CF 2017-09 —  https://commitfest.postgresql.org/14/1206/. 


—
Thanks and Regards,
Alik Khilazhev
Postgres Professional:
http://www.postgrespro.com
The Russian Postgres Company

Commits

  1. Add approximated Zipfian-distributed random generator to pgbench.