I want to know the time that it takes to execute a query in Postgres, I see a lot of response that propose to use \timing, but I'm newbie in Postgres and I don't know how to use it, can anyone help
thank you in advance
The PostgreSQL function CURRENT_TIME returns the current time and time zone offset of the machine on which PostgreSQL is running. It is given as a value in the 'hh:mm:ss. nnnnnn+/-tz' format.
To calculate the difference between the timestamps in PostgreSQL, simply subtract the start timestamp from the end timestamp. Here, it would be arrival - departure . The difference will be of the type interval , which means you'll see it in days, hours, minutes, and seconds.
The ANALYZE option causes the statement to be actually executed, not only planned. The total elapsed time expended within each plan node (in milliseconds) and total number of rows it actually returned are added to the display. This is useful for seeing whether the planner's estimates are close to reality.
You can use \timing
only with the command line client psql
, since this is a psql
command.
It is a switch that turns execution time reporting on and off:
test=> \timing
Timing is on.
test=> SELECT 42;
┌──────────┐
│ ?column? │
├──────────┤
│ 42 │
└──────────┘
(1 row)
Time: 0.745 ms
test=> \timing
Timing is off.
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