Tom Lane wrote:
Mark Kirkwood <[EMAIL PROTECTED]> writes:
Right - in principle it is not that difficult to add (once I have the machinery for the cost limiter going properly that is). I thinking we could either:

1. Add hooks to count work_mem allocations where they happen, or
2. Scan the plan tree and deduce how many work_mem allocations there will be.

The problem with this is that many of the cost models depend on
work_mem, so you can't simply arbitrarily alter the setting
after-the-fact.  At least not if you don't want to kill performance.

Right - the intention would be to merely count the number of work_mem allocations against some type of total, rather than modifying work_mem itself.



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