Finding execution time for a query

From: Prasanna Thirugnanasambandam <balajipts07(at)gmail(dot)com>
To: pgsql-general(at)lists(dot)postgresql(dot)org
Subject: Finding execution time for a query
Date: 2025-03-13 09:51:27
Message-ID: CAPhJzzWnGBbyOW4a5acgBqCgQef5Je-JSrjXBAnE86BukWHw+w@mail.gmail.com
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Hello all,

How do I find the execution time of a query?
I tried these methods:
I used

pgbench - pgbench -n -t 1 -f ./query.sql <database name>

and got:

latency average = 9.787 ms <- should i take this as the execution time?
initial connection time = 12.481 ms
tps = 102.176356 (without initial connection time)

used *pg_stat_statements* to fetch execution time for that query.

SELECT total_exec_time FROM pg_stat_statements where query = '<query here>'

got:

total_exec_time
--------------------
12.242579000000001
(1 row)

used *EXPLAIN ANALYZE*, got:

QUERY PLAN

------------------------------------------------------------------------------------------------
<query description> (cost=0.00..0.01 rows=0 width=0) (actual
time=0.182..0.182 rows=0 loops=1)
-> Result (cost=0.00..0.01 rows=1 width=230) (actual time=0.034..0.034
rows=1 loops=1)
Planning Time: 0.021 ms
Execution Time: 0.195 ms
(4 rows)

Now, which among these gives me the actual execution time of the query? Or
rather, how can i find out the actual execution time of the query?

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