The VictoriaMetrics Observability Blog

My VictoriaMetrics cluster has a very high churn rate at 0:00 every day. However, when I enable -logNewSeries, I find that these ’new’ time series were actually seen before. Why is this happening?

Slices are way more flexible than arrays since they’re basically a layer on top of an array. They can resize dynamically, and you can use append() to add more elements.

A software license change may have a short term impact on revenue, but the long-term damage can be consequential and take time to fix. Read our CTO’s take on open source software licenses vs revenue growth rates.

Instead of just throwing these objects after each use, which would only give the garbage collector more work, we stash them in a pool (sync.Pool). The next time we need something similar, we just grab it from the pool instead of making a new one from scratch.

We’re happy to announce VictoriaMetrics Cloud, a hosted monitoring platform and managed service for metrics that allows organizations to monitor and store large amounts of time-series data, without having to run the underlying infrastructure.

Map is a built-in type that acts as a key-value storage. Unlike arrays where you’re stuck with keys as increasing indices like 0, 1, 2, and so on, with maps, the key can be any comparable type.

I have already recorded metrics in the application, why can’t I see my metrics on Grafana?

Mutex in Go has two main flows: Lock and Unlock and 2 modes: Normal and Starvation Mode. The state field of mutex is a 32-bit integer that represents the current state, it’s divided into multiple bits that encode various pieces of information about the mutex.

As always, we’ll start with the basics and then dig a bit deeper. Don’t worry, Go arrays get pretty interesting when you look at them from different angles. Arrays in Go are a lot like those in other programming languages. They’ve got a fixed size and store elements of the same type in contiguous memory locations.

The defer statement actually has 3 types: open-coded defer, heap-allocated defer, and stack-allocated. Each one has different performance and different scenarios where they’re best used, which is good to know if you want to optimize performance.