On Thu, 24 Mar 2005, Tom Lane wrote:
Mark Lewis <[EMAIL PROTECTED]> writes:I've got a similar problem with deletes taking a very long time. I know that there are lots of foreign keys referencing this table, and other foreign keys referencing those tables, etc. I've been curious, is there a way to find out how long the foreign key checks take for each dependent table?
There is not any easy way at the moment.
Hmm ... I wonder how hard it would be to teach EXPLAIN ANALYZE to show the runtime expended in each trigger when the statement is of a kind that has triggers. We couldn't break down the time *within* the triggers, but even this info would help a lot in terms of finger pointing ...
Seq Scan on ... (nn.nnn ms) Trigger foo: nn.mmm ms Trigger bar: nn.mmm ms Total time: nn.mmm ms
and if you add
Index foo_idx: nn.mm ss Heap foo_tbl: nn.mm ss
regards, tom lane
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