public inbox for [email protected]  

help / color / mirror / Atom feed

From: Bertrand Drouvot <[email protected]>
To: Michael Paquier <[email protected]>
Cc: Nazir Bilal Yavuz <[email protected]>
Cc: Alvaro Herrera <[email protected]>
Cc: Kyotaro Horiguchi <[email protected]>
Cc: [email protected]
Subject: Re: per backend I/O statistics
Date: Thu, 19 Dec 2024 06:12:04 +0000
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>

Hi,

On Thu, Dec 19, 2024 at 01:21:54PM +0900, Michael Paquier wrote:
> 
> While doing more tests with backends exiting concurrently with their
> stats scanned, I have detected one path in pg_stat_get_backend_io()
> after calling pgstat_get_beentry_by_proc_number() where we should also
> check that it does not return NULL, or we would crash on a pointer
> dereference when reading the backend type.
> 
> Fixed that,

Oh right, indeed all the others pgstat_get_beentry_by_proc_number() callers are
checking for a NULL returned value.

> bumped the two version counters, and done.

Thanks!

I think I'll start a dedicated thread to discuss the stats_fetch_consistency/'snapshot'
point (will be easier to follow than resuming the discussion in this thread).

Regards,

-- 
Bertrand Drouvot
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com

view thread (39+ messages)  latest in thread

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], [email protected], [email protected], [email protected]
  Subject: Re: per backend I/O statistics
  In-Reply-To: <[email protected]>

* 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