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tsvector_update_trigger performance?

From: Chris St Denis <lists(at)on-track(dot)ca>
To: pgsql-performance(at)postgresql(dot)org
Subject: tsvector_update_trigger performance?
Date: 2009-06-24 07:20:18
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
Is tsvector_update_trigger() smart enough to not bother updating a 
tsvector if the text in that column has not changed?

If not, can I make my own update trigger with something like

    if new.description != old.description
        return tsvector_update_trigger('fti_all', 'pg_catalog.english',
    'title', 'keywords', 'description');
        return new;

or do I need to do it from scratch?

I'm seeing very high cpu load on my database server and my current 
theory is that some of the triggers may be causing it.


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Next:From: Oleg BartunovDate: 2009-06-24 07:27:21
Subject: Re: tsvector_update_trigger performance?
Previous:From: Chris St DenisDate: 2009-06-24 07:16:38
Subject: Re: How would you store read/unread topic status?

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