Re: Statement Queuing

Tom Lane wrote:
> Mark Kirkwood <markir@paradise.net.nz> 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.

Cheers

Mark