On 02/16/2015 08:48 PM, Petr Jelinek wrote:
On 17/02/15 01:57, Peter Geoghegan wrote:
On Mon, Feb 16, 2015 at 4:44 PM, Petr Jelinek <p...@2ndquadrant.com> wrote:
We definitely want this feature, I wished to have this info many times.

I would still like to see a benchmark.



Average of 3 runs of read-only pgbench on my system all with pg_stat_statement activated:
HEAD:  20631
SQRT:  20533
SQRTD: 20592




So using sqrtd the cost is 0.18%. I think that's acceptable.

cheers

andrew


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