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This year Grafana Mimir — the open source, horizontally scalable, multi-tenant time series database (TSDB) — will celebrate its third anniversary. Over the years, Mimir has become the go-to, Prometheus-compatible metrics backend within the open source community, with 29 maintainers and more than 4.6k GitHub stars. Since introducing Mimir, we’ve worked hard to deliver on our promise of making it the most scalable and performant open source TSDB in the world.

In the last few years, Postgres has experienced a meteoric rise in popularity. A relational database that not long ago was relatively unknown outside of academic circles has now eclipsed MySql as the most popular database for developers in the most recent StackOverflow user survey. Why has it achieved such impressive popularity with developers?

When you're working with DynamoDB, one of the most critical things you need to keep an eye on is throttling. If you're not careful, throttling can severely impact your database's performance. It’s not just about slower response times—throttling can lead to system failures or unexpected downtime if not addressed properly.

In case you haven’t heard about it yet, FOSDEM (Free and Open Source Software Developers’ European Meeting) is a huge, free, gathering for open-source software enthusiasts that happens every February in Brussels, Belgium. It’s a non-profit event put together by the community, and it’s one of the biggest of its kind - we’re talking about around 10,000 people from all over the world coming to hang out and talk about all things open source.

Cardinality refers to the number of unique values in a dataset column. A column with many distinct values—like a user ID or timestamp—has high cardinality, while a column with limited distinct values—like a boolean flag (true/false) or a category with a few possible options—has low cardinality. For example, consider a database of an e-commerce platform.