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
---------------------------(end of broadcast)---------------------------
TIP 5: Have you checked our extensive FAQ?
http://www.postgresql.org/docs/faq
Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83
---------------------------(end of broadcast)---------------------------
TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
