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Re: determining maxsize for character varying

From: okparanoid(at)free(dot)fr
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: determining maxsize for character varying
Date: 2007-06-16 11:35:09
Message-ID: 1181993709.4673caedd6fe8@imp.free.fr (view raw or flat)
Thread:
Lists: pgsql-performance
Thanks

if i understand well that means that if i choose character varying(3) or
character varying(8) or character varying(32) or character varying with no max
length the fields will take the same place in the disk (8kb) except for fields
too long to take place in the 8kb whose are stored in another place ?

Is that correct ?

So for small strings it's better to choose character(n) when it's possible ?


Best regards,

Loic

Selon Andreas Kretschmer <akretschmer(at)spamfence(dot)net>:

> okparanoid(at)free(dot)fr <okparanoid(at)free(dot)fr> schrieb:
>
> > Hello i would like to know if not determining a max size value for a
> character
> > varying's fields decrease the perfomance (perhaps size of stockage ? or
> > something else ?)
>
> No problem because of the TOAST-technology:
> http://www.postgresql.org/docs/current/static/storage-toast.html
>
>
> Andreas
> --
> Really, I'm not out to destroy Microsoft. That will just be a completely
> unintentional side effect.                              (Linus Torvalds)
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