"Joshua D. Drake" <j...@commandprompt.com> writes: > On Fri, 2009-11-13 at 16:06 -0500, Tom Lane wrote: >> This is a bad idea and I want to reject it outright. No ordinary user >> is really going to care about those details, and palloc is a >> sufficiently hot hot-spot that even the allegedly negligible overhead >> of an inactive dtrace probe is going to cost us.
> No ordinary user is going to use dtrace at all. Right, but *those probes are going to cost him performance anyway* if he's using a dtrace-enabled build. Probes associated with I/O calls might be negligible, probes in palloc are not going to be. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers