public inbox for [email protected]  

help / color / mirror / Atom feed

From: Vitale, Anthony, Sony Music <[email protected]>
To: Tom Lane <[email protected]>
Cc: [email protected] <[email protected]>
Subject: RE: Question on what Duration in the log
Date: Wed, 9 Apr 2025 15:47:32 +0000
Message-ID: <AS8PR02MB100789E94374714BDAEF6B7C899B42@AS8PR02MB10078.eurprd02.prod.outlook.com> (raw)
In-Reply-To: <[email protected]>
References: <AS8PR02MB100787E253E044418232962DC99B42@AS8PR02MB10078.eurprd02.prod.outlook.com>
	<[email protected]>

Thanks Tom

Perfect.

Anthony Vitale
 
This message is only for the use of the persons(s) to whom it is intended. It may contain privileged and confidential information within the meaning of applicable law. If you are not the intended recipient, please do not use this information for any purpose, destroy this message and inform the sender immediately. The views expressed in this communication may not necessarily be the views held by Sony Music Entertainment

-----Original Message-----
From: Tom Lane <[email protected]> 
Sent: Wednesday, April 9, 2025 11:02 AM
To: Vitale, Anthony, Sony Music <[email protected]>
Cc: [email protected]
Subject: Re: Question on what Duration in the log

EXTERNAL SENDER


"Vitale, Anthony, Sony Music" <[email protected]> writes:
> In my PG Version 14 log I have set to log the duration of sql (Example of one log row below).
> 2025-04-08 07:31:57 UTC:XXX(55994):XXX:[8949]:LOG:  duration: 6555.756 
> ms  execute S_381: {Actual Parameterized Sql executed} This Shows the Execution of a JDBC Server Side Prepared statement (i.e S_381) which took 6.5 seconds.

> When I run the Sql using explain analyze it runs shows an execution 
> time of 73 ms Planning Time: 0.773 ms Execution Time: 73.578 ms

They're not measuring the same thing really, because EXPLAIN isn't counting the time needed to transmit data to the client.

This is not just a matter of network overhead (though that can be
substantial) but also the time required to format the values into text.  If you are talking about large values, which I bet you are, there is also the time needed to fetch them from out-of-line TOAST storage, which is another thing that doesn't happen in EXPLAIN.

Since v17, EXPLAIN has grown a SERIALIZE option that causes it to do everything except the network transmission, which might be of interest in analyzing this further.

                        regards, tom lane


This email originated from outside of Sony Music.  Do not click links or open attachments unless you recognize the sender and know the content is safe.

view thread (3+ messages)

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected]
  Subject: RE: Question on what Duration in the log
  In-Reply-To: <AS8PR02MB100789E94374714BDAEF6B7C899B42@AS8PR02MB10078.eurprd02.prod.outlook.com>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox