We recently hit an interesting case where planner picked wrong plan. Kinda. And figured it could be used to show how to deal with such cases.
Continue reading Case study: optimization of weirdly picked bad plan
Tag: memory
What is the point of bouncing?
Some of you might be familiar with pgBouncer project. Some are not. Some understand what/how/why it does, others do not.
This blog post is to have a place where I can point people who have question about how it works, why, and when it makes sense to use it (pgBouncer that is).
How much RAM is PostgreSQL using?
(disclaimer: all the data and examples in here are on Linux – the same data can be probably obtained on other systems too, it's just that I work on Linux and don't know other systems well).
This question pops occasionally in various places – PostgreSQL is using too much memory, why is that, and how can it be mitigated?
Before we can go to “optimizing", we should understand the problem. But do we? Both standard tools – ps and top – lie. How/why? Let's see.