Re: Slow deleting tables with foreign keys

Hi Bob,

The "table_version.revision" ("revision" is the same) table has a primary key on id because of the PK "revision_pkey". Actually at the moment there are only two rows in the table table_version.revision!

Thanks for the tips about the indexes. I'm still in the development and tuning process, so I will do some analysis of the index stats to see if they are indeed redundant.

Cheers,
Jeremy
________________________________________
From: Bob Lunney [bob_lunney(at)yahoo(dot)com]
Sent: Friday, 1 April 2011 3:54 a.m.
To: pgsql-performance(at)postgresql(dot)org; Jeremy Palmer
Subject: Re: [PERFORM] Slow deleting tables with foreign keys

Jeremy,

Does table_revision have a unique index on id? Also, I doubt these two indexes ever get used:

CREATE INDEX idx_crs_action_expired_created
ON table_version.bde_crs_action_revision
USING btree
(_revision_expired, _revision_created);

CREATE INDEX idx_crs_action_expired_key
ON table_version.bde_crs_action_revision
USING btree
(_revision_expired, audit_id);

Bob Lunney
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