RE: GEQO status? - Mailing list pgsql-hackers

From Andrew Snow
Subject RE: GEQO status?
Date
Msg-id JEEGIJPOJIGGIIHGKOKOOEBCCHAA.andrew@modulus.org
Whole thread Raw
In response to AW: GEQO status?  (Zeugswetter Andreas SB <ZeugswetterA@wien.spardat.at>)
List pgsql-hackers
> I would set Seed per default. Even worse than a bad query path
> is an unpredictable query path. I see no argument, that a random Seed
> would buy us anything.

This kindof bugs me -- if you leave it stuck at a preset value, it makes it
possible to never delve into parts of solution space that have more optimal
solutions than the default seed will ever find.  Surely a random seed would
make the solution better on average over a large number of queries.

On the other hand, if the system as a whole is working well, it should not
matter what the seed is.


- Andrew



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