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

jon
Some minor things in the paper edition that says “3 2020” on the title page verso, not mentioned in the book’s errata online: p. 186 But...
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
telemachus
Python Testing With Pytest - Chapter 2, warnings for “unregistered custom marks” While running the smoke tests in Chapter 2, I get these...
New
lirux
Hi Jamis, I think there’s an issue with a test on chapter 6. I own the ebook, version P1.0 Feb. 2019. This test doesn’t pass for me: ...
New
joepstender
The generated iex result below should list products instead of product for the metadata. (page 67) iex> product = %Product{} %Pento....
New
curtosis
Running mix deps.get in the sensor_hub directory fails with the following error: ** (Mix) No SSH public keys found in ~/.ssh. An ssh aut...
New
oaklandgit
Hi, I completed chapter 6 but am getting the following error when running: thread 'main' panicked at 'Failed to load texture: IoError(O...
New
s2k
Hi all, currently I wonder how the Tailwind colours work (or don’t work). For example, in app/views/layouts/application.html.erb I have...
New
New
SlowburnAZ
Getting an error when installing the dependencies at the start of this chapter: could not compile dependency :exla, "mix compile" failed...
New

Other popular topics Top

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
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
mafinar
This is going to be a long an frequently posted thread. While talking to a friend of mine who has taken data structure and algorithm cou...
New
AstonJ
Was just curious to see if any were around, found this one: I got 51/100: Not sure if it was meant to buy I am sure at times the b...
New
Help
I am trying to crate a game for the Nintendo switch, I wanted to use Java as I am comfortable with that programming language. Can you use...
New
PragmaticBookshelf
Author Spotlight Rebecca Skinner @RebeccaSkinner Welcome to our latest author spotlight, where we sit down with Rebecca Skinner, auth...
New
New
mindriot
Ok, well here are some thoughts and opinions on some of the ergonomic keyboards I have, I guess like mini review of each that I use enoug...
New

Sub Categories: