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Enumeration of tables is very slow in largish database

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Hi all,

we have a Postgres/PostGIS database with 100+ schemas and 200+ tables in each schema, generated automatically. When adding a new PostGIS layer in QGis, the application obviously enumerates all tables, and this takes minutes. Even browsing the database in pgAdmin3 is horribly slow -- it takes several seconds to e.g. open a schema (click on a schema's "+" in the tree view).

The problems occurred only after adding that many schemas to the database. Before, with only 10+ schemas, the performance was acceptable.

Is this a known limitation of Postgres, or perhaps a misconfiguration of our installation? What would you suggest to improve performance here? We currently don't have administration rights for the database or login rights for the server machine (Linux), but I think we'll need to take care about that.


Best regards

Kirill

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