Erlang Application Metrics with Folsom
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This document summarizes a presentation about using the Folsom library for collecting application metrics in Erlang applications. It introduces Folsom as a library for exporting various types of application metrics, including counters, gauges, histograms, and Erlang VM metrics. It also describes the different metric types and how to use Folsom to collect and analyze metrics. The presentation concludes with a demo of Folsom.
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Utilities and water companies play a key role in the creation of clean drinking water. The creation and maintenance of clean drinking water is becoming a critical problem due to pollution and pressure on the environment. A lot of data is necessary to create clean drinking water. For fieldworkers, two types of data are key: Asset data in an asset management system (EAM for example) and Geographic data in a GIS (ArcGIS Utility Network ). Keeping this type of data up to date and in sync is a challenge for many organizations, leading to duplicating data and creating a bulk of extra attributes and data to keep everything in sync. Using FME, it is possible to synchronize Enterprise Asset Management (EAM) data with the ArcGIS Utility Network in real time. Changes (creation, modification, deletion) in ArcGIS Pro are relayed to EAM via FME, and vice versa. This ensures continuous synchronization of both systems without daily bulk updates, minimizes risks, and seamlessly integrates with ArcGIS Utility Network services. This presentation focuses on the use of FME at a Dutch water company, to create a sync between the asset management and GIS.FIDO Seminar: Authentication for a Billion Consumers - Amazon.pptx
FIDO Seminar: Authentication for a Billion Consumers - Amazon.pptxFIDO Alliance
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FIDO Seminar: Authentication for a Billion Consumers - AmazonKey Requirements to Successfully Implement Generative AI in Edge DevicesOpt...
Key Requirements to Successfully Implement Generative AI in Edge DevicesOpt...Edge AI and Vision Alliance
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Erlang Application Metrics with Folsom
- 1. Erlang Application Metrics with Folsom Joe Williams (@williamsjoe) Boundary (@boundary / boundary.com) Friday, March 30, 12
- 2. Who Am I? Joe Williams @williamsjoe Ops at Boundary Friday, March 30, 12
- 3. What is Boundary? Realtime Monitoring and Analytics Platform Were hiring! TRY MY PRODUCT Friday, March 30, 12
- 4. Agenda Current and Future Monitoring Systems Define Application Metrics What is Folsom? How do you use Folsom? Friday, March 30, 12
- 5. Legacy Monitoring Tools Consumers of application metrics Munin, Ganglia, etc Wide variety of protocols, interfaces and formats Usually RRD, results in inflexible, infrequently refreshed PNGs on HTML Not what this talk is about. Friday, March 30, 12
- 6. Current Monitoring Tools Consumers of application metrics OpenTSDB, statsd, Rienmann, etc are a steps in the right direction Hopefully fewer protocols, interfaces and formats Realtime, dynamic graphing Not what this talk is about. Friday, March 30, 12
- 7. Application Metrics .. code generates business value when it runs. ~ Coda Hale Friday, March 30, 12
- 8. Application Metrics Code instrumentation Write code to measure code Verify code behaves as you expect Exporting results of instrumentation General VM health Friday, March 30, 12
- 9. Folsom Application-level metrics Multiple metric types Powerful statistical analysis Easily extensible Friday, March 30, 12
- 10. Folsom DEMO! Friday, March 30, 12
- 11. Metric Types Counters Gauges Histograms Histories Meters Erlang VM Metrics Friday, March 30, 12
- 12. Counters Counter metrics provide increment and decrement capabilities for a single scalar value. Friday, March 30, 12
- 13. Counters > folsom_metrics:new_counter(Name). > folsom_metrics:notify({Name, {inc, Value}}). > folsom_metrics:notify({Name, {dec, Value}}). Friday, March 30, 12
- 14. Gauges Gauges are point-in-time single value metrics. Friday, March 30, 12
- 15. Gauges > folsom_metrics:new_gauge(Name). > folsom_metrics:notify({Name, Value}). Friday, March 30, 12
- 16. Histograms Histograms are collections of values that have statistical analysis done to them, such as mean, min, max, kurtosis and percentile. The can be used like "timers" as well with the timed update functions. Friday, March 30, 12
- 17. Histograms > folsom_metrics:new_histogram(Name). > folsom_metrics:histogram_timed_update(Name, Mod, Fun, Args). > folsom_metrics:histogram_timed_update(Name, Fun, Args). > folsom_metrics:histogram_timed_update(Name, Fun). > folsom_metrics:notify({Name, Value}). Friday, March 30, 12
- 18. Histories Histories are a collection of past events, such as errors or log messages. Friday, March 30, 12
- 19. Histories > folsom_metrics:new_history(Name). > folsom_metrics:get_history_values(Name, Count). > folsom_metrics:notify({Name, Value}). Friday, March 30, 12
- 20. Meters Meters are increment only counters with mean rates and exponentially weighted moving averages applied to them, similar to a unix load average. Friday, March 30, 12
- 21. Meters > folsom_metrics:new_meter(Name). > folsom_metrics:notify({Name, Value}). Friday, March 30, 12
- 22. Erlang VM General VM metrics provided by Erlang VM. Friday, March 30, 12
- 23. Erlang VM > folsom_vm_metrics:get_memory(). > folsom_vm_metrics:get_system_info(). > folsom_vm_metrics:get_statistics(). > folsom_vm_metrics:get_port_info(). > folsom_vm_metrics:get_process_info(). Friday, March 30, 12
- 24. Statistics Statistical Analysis Exponentially Weighted Moving Average (EWMA) Rate / Acceleration Avg, Mean, Min, Max, etc Distribution Percentiles / Histograms Covariance / Correlation Friday, March 30, 12
- 25. Sampling Exponentially decaying Uniform None Friday, March 30, 12
- 26. Extensibility Clean Native API Folsom Wrappers REST+JSON Munin plugins! SNMP? Graphite? CollectD? Friday, March 30, 12
- 27. Future Work Metrics REST+JSON Spec Performance Improvements Better Querying, Slicing and etc of metric values More metric types (meter reader, timer, etc) Friday, March 30, 12
- 28. Similar Tools Coda Hales Metrics (JVM) - github.com/coda/metrics Ruby - github.com/johnewart/ruby-metrics JavaScript - github.com/mikejihbe/metrics .NET Metrics - github.com/danielcrenna/metrics-net Ostrich - github.com/twitter/ostrich Python Ostrich - github.com/wadey/python-ostrich .Net Ostrich - github.com/ewhauser/OstrichNet Friday, March 30, 12
- 29. Folsom DEMO! Friday, March 30, 12
- 30. Questions? Joe Williams (@williamsjoe) Boundary (@boundary / boundary.com) https://github.com/boundary/folsom Friday, March 30, 12