| From: | Harald Fuchs <hf0722x(at)protecting(dot)net> |
|---|---|
| To: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Random not so random |
| Date: | 2004-10-06 13:13:35 |
| Message-ID: | puoejgm1kw.fsf@srv.protecting.net |
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| Lists: | pgsql-general |
In article <D425483C2C5C9F49B5B7A41F89441547055523(at)postal(dot)corporate(dot)connx(dot)com>,
"Dann Corbit" <DCorbit(at)connx(dot)com> writes:
> A better way would be to seed a Mersenne Twister PRNG at server startup
> time and then use the same generator for all subsequent calls.
> http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
> The period is exceptionally long, and it has many excellent properties.
I think you're slightly missing the point. Every PRNG always returns
the same output swquence for the same seed, and that's the problem
with the current implementation: it might happen that two backends get
the same seed.
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