# alter system set auto_explain.log_analyze = on;
ALTER SYSTEM
# alter system set auto_explain.log_min_duration=0;
ALTER SYSTEM
# alter system set auto_explain.log_timing=off;
ALTER SYSTEM
# select pg_reload_Conf();
 pg_reload_conf
----------------
 t
(1 row)

$ pgbench -i postgres
$ for i in {1..10}; do pgbench -n -M prepared -T 10 -S postgres | grep tps; done
tps = 11313.865802
tps = 11353.239133
tps = 11278.210905
tps = 11254.050329
tps = 11322.879711
tps = 11204.294425
tps = 11175.276264
tps = 11211.813427
tps = 11229.452802
tps = 11049.732047

# alter system set auto_explain.log_buffers=1;
ALTER SYSTEM
# select pg_reload_conf();
 pg_reload_conf
----------------
 t
(1 row)

$ for i in {1..10}; do pgbench -n -M prepared -T 10 -S postgres | grep tps; done
tps = 10509.378765
tps = 11077.139873
tps = 11232.809410
tps = 11141.543652
tps = 11003.065838
tps = 11121.254826
tps = 11136.912487
tps = 11039.627884
tps = 11079.197251
tps = 11122.450776

# alter system set auto_explain.log_min_duration=-1;
ALTER SYSTEM
# select pg_reload_conf();
 pg_reload_conf
----------------
 t
(1 row)

$ for i in {1..10}; do pgbench -n -M prepared -T 10 -S postgres | grep tps; done
tps = 12663.516909
tps = 13456.062885
tps = 13245.672977
tps = 13326.781348
tps = 13501.902909
tps = 13156.941863
tps = 13212.124942
tps = 13372.313995
tps = 13164.414056
tps = 13236.860009