fidalgo

fidalgo

High Performance PostgreSQL for Rails: Using Advisory Locks (page 195)

@andatki

In this page, you mention:
The Transaction Pooling Mode for PgBouncer cannot be used with Advisory Locks
Can you expand a title further on this? PgBouncer is like a first resource when people run out of database connections, and now that it supports prepared statements people are much more inclined to continue to use it.
With the increase awareness of advisory locks and things like GoodJob background job processing, are we increasing the risk of problems?

In the table for features for PGBouncer we can find some information: PgBouncer features

Do you think that having a more detailed explanation on the risks and what we should do to ensure to remain compatible (using session pooling, basically)

Even after reading the Choosing A PgBouncer Pooling Mode in page 190 and when using GoodJob, being the transaction mode, the most common, the user can easily fall in the trap of choosing the most common method to later release it’s not supported.

First Post!

andatki

andatki

Author of High Performance PostgreSQL for Rails

Thanks @fidalgo. That’s a good idea to point out that possible surprise. As you noted, we can now use Prepared Statements with PgBouncer in the transaction pooling mode. But other “client features” aren’t supported, also as you noted, leaving only session mode which has less benefits. I agree it would nice to provide some warning and caution about that. I’ll follow up if I can get something included in time. Thank you!

Where Next?

Popular Pragmatic Bookshelf topics Top

jimschubert
In Chapter 3, the source for index introduces Config on page 31, followed by more code including tests; Config isn’t introduced until pag...
New
belgoros
Following the steps described in Chapter 6 of the book, I’m stuck with running the migration as described on page 84: bundle exec sequel...
New
jesse050717
Title: Web Development with Clojure, Third Edition, pg 116 Hi - I just started chapter 5 and I am stuck on page 116 while trying to star...
New
jamis
The following is cross-posted from the original Ray Tracer Challenge forum, from a post by garfieldnate. I’m cross-posting it so that the...
New
cro
I am working on the “Your Turn” for chapter one and building out the restart button talked about on page 27. It recommends looking into ...
New
hgkjshegfskef
The test is as follows: Scenario: Intersecting a scaled sphere with a ray Given r ← ray(point(0, 0, -5), vector(0, 0, 1)) And s ← sphere...
New
kolossal
Hi, I need some help, I’m new to rust and was learning through your book. but I got stuck at the last stage of distribution. Whenever I t...
New
bjnord
Hello @herbert ! Trying to get the very first “Hello, Bracket Terminal!" example to run (p. 53). I develop on an Amazon EC2 instance runn...
New
gorkaio
root_layout: {PentoWeb.LayoutView, :root}, This results in the following following error: no “root” html template defined for PentoWeb...
New
davetron5000
Hello faithful readers! If you have tried to follow along in the book, you are asked to start up the dev environment via dx/build and ar...
New

Other popular topics Top

AstonJ
If it’s a mechanical keyboard, which switches do you have? Would you recommend it? Why? What will your next keyboard be? Pics always w...
New
AstonJ
Curious to know which languages and frameworks you’re all thinking about learning next :upside_down_face: Perhaps if there’s enough peop...
New
AstonJ
I’ve been hearing quite a lot of comments relating to the sound of a keyboard, with one of the most desirable of these called ‘thock’, he...
New
New
AstonJ
Just done a fresh install of macOS Big Sur and on installing Erlang I am getting: asdf install erlang 23.1.2 Configure failed. checking ...
New
AstonJ
I ended up cancelling my Moonlander order as I think it’s just going to be a bit too bulky for me. I think the Planck and the Preonic (o...
New
rustkas
Intensively researching Erlang books and additional resources on it, I have found that the topic of using Regular Expressions is either c...
New
PragmaticBookshelf
Build efficient applications that exploit the unique benefits of a pure functional language, learning from an engineer who uses Haskell t...
New
New
NewsBot
Node.js v22.14.0 has been released. Link: Release 2025-02-11, Version 22.14.0 'Jod' (LTS), @aduh95 · nodejs/node · GitHub
New

Sub Categories: