Thread: Finding execution time for a query

Finding execution time for a query

From
Prasanna Thirugnanasambandam
Date:
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?

Re: Finding execution time for a query

From
Laurenz Albe
Date:
On Thu, 2025-03-13 at 15:21 +0530, Prasanna Thirugnanasambandam wrote:
> How do I find the execution time of a query?

My Stackexchange answer didn't satisfy?
https://dba.stackexchange.com/a/345698/176905

Yours,
Laurenz Albe