On 27th of March, Andrew Dunstan committed patch:
Add stats for min, max, mean, stddev times to pg_stat_statements. The new fields are min_time, max_time, mean_time and stddev_time. Based on an original patch from Mitsumasa KONDO, modified by me. Reviewed by Petr Jelínek.
Continue reading Waiting for 9.5 – Add stats for min, max, mean, stddev times to pg_stat_statements.