Ok thanks,
Is it dangerous to delete toast tables?
________________________________
Von: Greg Williamson <gwilliamso...@yahoo.com>
An: Robert Buckley <robertdbuck...@yahoo.com>;
"postgis-users@postgis.refractions.net"
<postgis-users@postgis.refractions.net>; PostGIS Users Discussion
<postgis-users@postgis.refractions.net>
Gesendet: 22:43 Donnerstag, 22.September 2011
Betreff: Re: [postgis-users] where did pg_toast,pg_toast_temp1 come from?
Rob --
<...>
>
>Thanks,
>
>my version is 8.4. The table contains strings but are not too long...under
>100char.
>
>Thanks,
>
According to <http://trac.osgeo.org/postgis/wiki/DevWikiPostGISCoding>:
"All PostGIS objects are "varlena", they don't have a fixed size. ..."
So maybe you got some large geometries that triggered TOAST processing ?
Greg W.
>
>________________________________
>Von: Greg Williamson <gwilliamso...@yahoo.com>
>An: Robert Buckley <robertdbuck...@yahoo.com>;
>"postgis-users@postgis.refractions.net"
><postgis-users@postgis.refractions.net>; PostGIS Users Discussion
><postgis-users@postgis.refractions.net>
>Gesendet: 21:19 Donnerstag, 22.September 2011
>Betreff: Re: [postgis-users] where did pg_toast,pg_toast_temp1 come from?
>
>Rob --
>
>>Hi,
>>
>>
>>when I left work today these pg_toast tables were not in my database. when I
>>looked later ther were.
>>
>>
>>Can anyone tell me where they came from and why they are automatically
>>created in every database?
>>
>
>
>You don't state what version of postgres this happens on, but in general TOAST
>tables are created by the system to hold long compressed values (typically
>text aka varlena tables). I think you can turn this facility off, but in
>general postgres will try to take very long strings, for example, and compress
>them, putting them into a toast table to that the row size of the original
>table doesn't grow excessively. See, for example,
> <http://www.postgresql.org/docs/9.0/interactive/storage-toast.html>
>
>So I suspect what happened is that someone entered some long text values and
>postgres created the toast tables to handle these long strings.
>
>HTH,
>
>Greg Williamson
>
>
>
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>>
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