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VictoriaMetrics Observability Blog
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Filter: Performance
Blog posts
How Linux readahead works, and the two ways to change it
The kernel reads your files before you ask for them, guessing from where your reads land. Here is how that guessing actually works (the window, the marker, the background fetch) and the two ways to influence it: read_ahead_kb on the device, and posix_fadvise from inside the program. Neither does quite what its name suggests.
Announcing vmestimator: Real-time Cardinality Estimations for VictoriaMetrics and Prometheus
vmestimator is a new open-source tool that estimates metric cardinality in real time. It can alert to high-cardinality spikes before they slow queries and increase resource usage. Works with any Prometheus-compatible setups, Grafana, and vmalert
How Airbnb Built a High-Volume Metrics Pipeline with OpenTelemetry and vmagent
Learn how Airbnb rebuilt its observability pipeline with OpenTelemetry and vmagent to handle over 100 million samples per second, reduce cost by 10x, and simplify high-scale metrics aggregation.
VictoriaMetrics at KubeCon: Optimizing Tail Sampling in OpenTelemetry with Retroactive Sampling
If you’ve been struggling with the high resource overhead of tail sampling, check out retroactive sampling, an approach that significantly reduces sampling overhead for distributed tracing in OpenTelemetry.
Discarding gRPC-Go: The Story Behind OTLP/gRPC Support in VictoriaTraces
Why did VictoriaTraces build gRPC support without using gRPC-Go? And what are the benefits of adopting a simple HTTP/2 server and easyproto?
Developer's Note: Research on Distributed Tracing, Comparing With Tempo and ClickHouse
When it comes to observability, people often refer to its three pillars: metrics, tracing, and logging. At VictoriaMetrics, we already have solutions for metrics and logging. Throughout these years, we’ve heard a common question from the community: When will VictoriaTraces be released? If you are interested in this topic, then this blog post is for you. We’ll share the results of our research into distributed tracing and explore two key questions: Will there be a VictoriaTraces? And how competitive could it be?
Inside Go's Unique Package: String Interning Simplified
When you’ve got several identical values in your code, you only store one copy. Instead of having several copies of the same thing, they all just point to this one version, which is a lot more efficient. It’s a process often called ‘interning’ in programming circles.
How to reduce expenses on monitoring: be smarter about data
This blog post is the second in the series of the blog posts based on the talk about ‘How to reduce expenses on monitoring’, stackconf 2023. It is about open-source instruments and techniques from the VictoriaMetrics ecosystem for improving cost-efficiency of monitoring.
Comparing Performance and Resource Usage: Grafana Agent vs. Prometheus Agent Mode vs. VictoriaMetrics vmagent
We compared the performance and resource usage of Grafana Agent, Prometheus Agent Mode, and VictoriaMetrics vmagent to help readers make informed decisions when choosing an agent for their monitoring needs.