Tom Lane wrote:
> A possible objection to this is that running a query inside a
> subtransaction might have different/worse performance than running it
> at top level. I don't recall any severe bottlenecks of that kind but
> that doesn't mean there aren't any (Alvaro, any comments?)
Nope, nothing that I recall. Maybe make sure to generate the Xid of the
subtransaction before starting the EXPLAIN itself (so that there is no
pg_subtrans I/O pending, etc)
--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.