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

jimmykiang
This test is broken right out of the box… — FAIL: TestAgent (7.82s) agent_test.go:77: Error Trace: agent_test.go:77 agent_test.go:...
New
johnp
Hi Brian, Looks like the api for tinydb has changed a little. Noticed while working on chapter 7 that the .purge() call to the db throws...
New
ianwillie
Hello Brian, I have some problems with running the code in your book. I like the style of the book very much and I have learnt a lot as...
New
yulkin
your book suggests to use Image.toByteData() to convert image to bytes, however I get the following error: "the getter ‘toByteData’ isn’t...
New
fynn
This is as much a suggestion as a question, as a note for others. Locally the SGP30 wasn’t available, so I ordered a SGP40. On page 53, ...
New
jskubick
I think I might have found a problem involving SwitchCompat, thumbTint, and trackTint. As entered, the SwitchCompat changes color to hol...
New
jgchristopher
“The ProductLive.Index template calls a helper function, live_component/3, that in turn calls on the modal component. ” Excerpt From: Br...
New
New
tkhobbes
After some hassle, I was able to finally run bin/setup, now I have started the rails server but I get this error message right when I vis...
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

Other popular topics Top

ohm
Which, if any, games do you play? On what platform? I just bought (and completed) Minecraft Dungeons for my Nintendo Switch. Other than ...
New
wolf4earth
@AstonJ prompted me to open this topic after I mentioned in the lockdown thread how I started to do a lot more for my fitness. https://f...
New
New
AstonJ
poll poll Be sure to check out @Dusty’s article posted here: An Introduction to Alternative Keyboard Layouts It’s one of the best write-...
New
PragmaticBookshelf
Tailwind CSS is an exciting new CSS framework that allows you to design your site by composing simple utility classes to create complex e...
New
Exadra37
I am asking for any distro that only has the bare-bones to be able to get a shell in the server and then just install the packages as we ...
New
AstonJ
If you want a quick and easy way to block any website on your Mac using Little Snitch simply… File > New Rule: And select Deny, O...
New
First poster: bot
zig/http.zig at 7cf2cbb33ef34c1d211135f56d30fe23b6cacd42 · ziglang/zig. General-purpose programming language and toolchain for maintaini...
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
PragmaticBookshelf
Fight complexity and reclaim the original spirit of agility by learning to simplify how you develop software. The result: a more humane a...
New

Sub Categories: