On Wed, Jun 1, 2011 at 7:35 PM, Mark Kirkwood
<mark.kirkwood@catalyst.net.nz> wrote:
> Done - 'work_disk' it is to match 'work_mem'.
I guess I'm bikeshedding here, but I'm not sure I really buy this
parallel. work_mem is primarily a query planner parameter; it says,
if you're going to need more memory than this, then you have to
execute the plan some other way. This new parameter is not a query
planner paramater AIUI - its job is to KILL things if they exceed the
limit. In that sense it's more like statement_timeout. I can imagine
us wanting more parameters like this too. Kill the query if it...
...takes too long (statement_timeout)
...uses too much temporary file space (the current patch)
...uses too much CPU time
...uses too much RAM
...generates too much disk I/O
...has too high an estimated cost
...others?
So I'm not sure work_disk is a great name. Actually, work_mem is
already not a great name even for what it is, but at any rate I think
this is something different.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
