Tag: Testing
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Enhancing Apache Spark Performance with Flame Graphs: A Practical Example Using Grafana Pyroscope
Enhancing Apache Spark Performance with Flame Graphs: A Practical Example Using Grafana Pyroscope TL;DR Explore a step-by-step example of troubleshooting Apache Spark job performance using flame graph visualization and profiling. Discover the seamless integration of Grafana Pyroscope with Spark for streamlined data collection and visualization. The Puzzle of the Slow Query Set within the framework
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CPU Load Testing Exercises: Tools and Analysis for Oracle Database Servers
CPU Load Testing Exercises: Tools and Analysis for Oracle Database Servers This document describes some basic CPU load testing exercises on three different types of database servers used by the Oracle Service at CERN. It reports on the tests performed, tools used for data gathering, data analysis, findings, and lessons learned. Motivations CPU usage is
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Building and documenting REST APIs with ORDS
Building and documenting REST APIs with ORDS Introduction In the first part of the article we will provide an overview of how you can use Oracle REST Data Services for providing APIs directly from your PL/SQL code . The second part covers how to document our Web services using Swagger. Lets begin with a couple
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Testing web applications SSO with Keycloak
Testing web applications SSO with Keycloak Usually when you are developing a new feature or fixing an issue, you want to focus in your business logic. If your application delegates the authentication in some SSO system you usually mocks the response from this last one. However for integration tests, it is nice to be able
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Testing a Small Query Language in Python with Hypothesis
Testing a Small Query Language in Python with Hypothesis Hypothesis is an implementation of Property-based testing for Python, similar to QuickCheck in Haskell/Erlang and test.check in Clojure (among others). Basically, it allows the programmer to formulate invariants about their programs, and have an automated system attempt to generate counter-examples that invalidates them. A Small Query
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Linux BPF/bcc for Oracle Tracing
Linux BPF/bcc for Oracle Tracing Topic: In this post you will find a short discussion and pointers to the code of a few sample scripts that I have written using Linux BPF/bcc and uprobes for Oracle tracing. Previous work and motivations Tools for dynamic tracing are very useful for troubleshooting and internals investigations of Oracle