stackconf 2023 | How to reduce expenses on monitoring with VictoriaMetrics by Roman Khavronenko.pdf
![Keeping only significant figures
instance:cpu_utilization:ratio_avg{instance="foo"} 0.05055757575781
instance:cpu_utilization:ratio_avg{instance="bar"} 0.05058181818236
rules:
- record: instance:cpu_utilization:ratio_avg
expr: avg_over_time(instance:node_cpu_utilization:ratio[5m])](https://image.slidesharecdn.com/slidesromankhavronenko-230920072452-f1f2582a/75/stackconf-2023-how-to-reduce-expenses-on-monitoring-with-victoriametrics-by-roman-khavronenkopdf-29-2048.jpg?cb=1695196971)
![How to use streaming aggregation
- match: "grpc_server_handled_total" # timeseries selector
interval: "2m" # on 2m interval
outputs: ["total"] # aggregate as counter
without: ["grpc_method"] # group without label
Result:
grpc_server_handled_total:2m_without_grpc_method_total](https://image.slidesharecdn.com/slidesromankhavronenko-230920072452-f1f2582a/75/stackconf-2023-how-to-reduce-expenses-on-monitoring-with-victoriametrics-by-roman-khavronenkopdf-46-2048.jpg?cb=1695196971)
stackconf 2023 | How to reduce expenses on monitoring with VictoriaMetrics by Roman Khavronenko.pdf
Given recent economic changes, cost efficiency has become a top priority for many businesses. This is especially important for monitoring because the nature of telemetry data tends to exponential growth. Many monitoring solutions are now switching their focus to optimize costs. The talk will cover open-source instruments from VictoriaMetrics ecosystem for improving monitoring cost-efficiency. Compression optimization. While ZSTD compression and time series specific techniques like delta-encoding are great, there is still room for improvement. I’ll explain what else can be done to reduce disk footprint for long-term storage. Extra compression on data transferring between metrics collectors and TSDB. I’ll explain how VictoriaMetrics collector reduces the traffic volume by 4 times. Pre-computing for telemetry data on collectors, frequently referred to as edge computing. In VictoriaMetrics it is named as streaming aggregation and allows collectors to pre-compute data, reducing its resolution and cardinality before it is pushed to the database. This is especially important for Prometheus-like systems because streaming aggregation is compatible with Prometheus RemoteWrite protocol and can be used with any system which supports it. Cardinality explorer. Interface, which provides useful insights into data stored by the TSDB. It helps to identify the most expensive metrics or labels and see how they have changed in time. Query tracing. This feature provides details about all the stages of query execution, including time spent on index lookups, disk reads, data transfer, computation, and memory expenses. This is similar to SQL EXPLAIN feature, and helps to improve the performance of read queries. Compute efficiency. VictoriaMetrics components for collecting and storing telemetry data consume fewer resources compared to components from Prometheus ecosystem. It may sound like competition or bragging, but this is a real reason why people migrate from Prometheus to VictoriaMetrics – to cut their infrastructure costs by 2-3 times. All the features listed above are open-source and are available for everyone to use. The talk will be mostly concentrated on typical use cases in monitoring and elegant ways to make things more efficient.
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stackconf 2023 | How to reduce expenses on monitoring with VictoriaMetrics by Roman Khavronenko.pdf
- 1. How to reduce expenses on monitoring with VictoriaMetrics Roman Khavronenko | github.com/hagen1778
- 2. Roman Khavronenko Co-founder of VictoriaMetrics Software engineer with experience in distributed systems, monitoring and high-performance services. https://github.com/hagen1778 https://twitter.com/hagen1778
- 3. What this talk is about 1. Best ways for storing and processing metrics 2. Open source tools only 3. For people familiar with Prometheus, Thanos, Mimir, VictoriaMetrics
- 9. Expenses!
- 10. You can either have a faster car… …or be a smarter driver!
- 11. What can you get from simple replacing?
- 14. Prometheus vs VictoriaMetrics benchmark
- 15. # the number of nodeexporter instances to scrape targetsCount: 1000 # how frequently to scrape nodeexporter targets scrapeInterval: 15s # rules evaluation interval # https://awesome-prometheus-alerts.grep.to/rules.html#host-and-hardware-1 queryInterval: 30s # scrapeConfigUpdatePercent is a churn rate generated once # per scrapeConfigUpdateInterval scrapeConfigUpdatePercent: 5 scrapeConfigUpdateInterval: 10m Prometheus vs VictoriaMetrics benchmark
- 22. x2.5 times less!
- 24. Summary after 7d benchmark (1k nodeexporter targets) Prometheus: CPU avg used: 0.79 / 3 cores Mem max used: 8.12 GiB / 12 GiB Read latency avg: 50th - 70.5ms 99th - 7s VictoriaMetrics: CPU avg used: 0.76 / 3 cores Mem max used: 4.5 GiB / 12 GiB Read latency avg: 50th - 4.3ms 99th - 3.6s
- 26. Network Data transfer costs
- 27. x4.5 times less!
- 28. Improving network compression 1. Increase compression level, trade CPU for network savings: a. remoteWrite.vmProtoCompressLevel 2. Increase batch size, trade latency for compression: a. remoteWrite.maxBlockSize b. remoteWrite.maxRowsPerBlock c. remoteWrite.flushInterval 3. Reduce entropy to improve compression: a. -remoteWrite.significantFigures b. -remoteWrite.roundDigits
- 29. Keeping only significant figures instance:cpu_utilization:ratio_avg{instance="foo"} 0.05055757575781 instance:cpu_utilization:ratio_avg{instance="bar"} 0.05058181818236 rules: - record: instance:cpu_utilization:ratio_avg expr: avg_over_time(instance:node_cpu_utilization:ratio[5m])
- 30. Keeping only significant figures Applying --vm-significant-figures=8 to recording rules 0.05055757575781 0.050557576 changed compression ratio from 1.2B to 0.8B per sample See more at https://medium.com/victoriametrics-how-to-migrate-data-from-prometheus
- 31. How to be smarter about data
- 32. Understanding the data - query tracing VictoriaMetrics supports query tracing for detecting bottlenecks during query processing. This is like EXPLAIN ANALYZE from Postgresql!
- 34. If query tracing demo didn't work… Typical query takes 4s to execute… Why?
- 35. If query tracing demo didn't work… Let's check the trace!
- 36. If query tracing demo didn't work… Let's check the trace!
- 37. If query tracing demo didn't work… 91% of the time was spent on vmselect while aggregating 9.4k series, 13Mil data samples!
- 38. How to improve query speed? 1. Add more resources to monitoring. 2. Or… be smarter about data!
- 40. If cardinality explorer demo didn't work…
- 41. If cardinality explorer demo didn't work…
- 42. If cardinality explorer demo didn't work…
- 43. Cardinality explorer: summary VictoriaMetrics allows exploring time series cardinality to identify: ● Metric names with the highest number of series ● Labels with the highest number of series ● Values with the highest number of series for the selected label ● label=name pairs with the highest number of series ● Labels with the highest number of unique values * Available built-in in VictoriaMetrics components * Supports specifying Prometheus URL
- 44. Streaming aggregation vs Recording rules The number of time series stored in TSDB is Data-in + Recording Rules results
- 45. Streaming aggregation vs Recording rules The number of time series stored in TSDB is only what needs to be persisted
- 46. How to use streaming aggregation - match: "grpc_server_handled_total" # timeseries selector interval: "2m" # on 2m interval outputs: ["total"] # aggregate as counter without: ["grpc_method"] # group without label Result: grpc_server_handled_total:2m_without_grpc_method_total
- 47. How to use streaming aggregation https://play.victoriametrics.com
- 48. Streaming aggregation: summary 1. Aggregate incoming samples in streaming mode before data is written to remote storage 2. Aggregation is applied to all the metrics received via any supported data ingestion protocol and/or scraped from Prometheus-compatible targets 3. Statsd alternative 4. Recording rules alternative 5. Reducing the number of stored samples 6. Reducing the number of stored series 7. Compatible with tools supporting Prometheus remote write protocol
- 53. Complexity penalty ● Complex systems are harder to maintain ● Complex systems are harder to educate about ● Complex systems are more expensive to scale
- 54. Additional materials 1. Snapshot of Grafana dashboard from the benchmark 2. Benchmark repo for reproducing the test 3. Save network costs with VictoriaMetrics remote write protocol 4. VictoriaMetrics: achieving better compression than Gorilla for time series data 5. Streaming aggregation 6. VictoriaMetrics playground