| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Cc: | Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Where does the time go? |
| Date: | 2006-03-25 15:00:51 |
| Message-ID: | 17991.1143298851@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers pgsql-patches |
Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> I would like to implement an additional mode for EXPLAIN ANALYZE that
> does no timing instrumentation at all. Most of the time just looking for
> differences between estimated and actual row counts is all you need.
I don't really agree with that premise ... without timings, you cannot
for instance tell if the planner has over/underestimated the cost of an
index fetch.
regards, tom lane
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Tom Lane | 2006-03-25 15:04:30 | Re: [SUGGESTION] CVSync |
| Previous Message | Alvaro Herrera | 2006-03-25 14:49:21 | Re: [SUGGESTION] CVSync |
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Martijn van Oosterhout | 2006-03-25 15:24:05 | Re: Where does the time go? |
| Previous Message | Jim C. Nasby | 2006-03-25 13:10:18 | Re: [PATCHES] Automatically setting work_mem |