DevOpsDays Cuba Performance test for Web Apps MARIALINA BALLESTEROS HERNÁNDEZ DATYS 

Performance test for Web Apps  Performance testing is the general name for tests that check how the system behaves and performs.  Performance testing examines responsiveness, stability, scalability, reliability, speed and resource usage of your software and infrastructure. Richard Bishop, Head of Service Development/Delivery at Trust IV Ltd 

Performance Testing Objectives  Validate the application to determine if it fulfills its performance goals or targets  Identify the point at which the load becomes so great that the application fails to meet performance requirements  Determine if the application will support typical – normal production load conditions 

Performance Testing Objectives  Tune the application for better performance by identifying the optimal system configuration  Find optimal hardware  Locate bottlenecks including in I/O, server, network and database 

When … 

Why … 

Performance Testing: 

First determine Baseline  Recreate production scenario  A test on “normal load” to establish a baseline for comparison with future tests.  1 user for a period of time or a few number of iterations 

Load Test simulate a number of concurrent users doing things you'd expect them to be doing in a "typical" session. 

Stress testing Stress testing is essentially "extreme" load testing 

Soak testing Soak testing is about simulating a typical load for extended periods of time, while monitoring performance. 

Process: 

JMeter  Configure: Cookies, Header, Request, External Variables  Recording Sessions 

JMeter  Configure: Cookies, Header, Request, External Variables  Recording Sessions  Users, Cycles 

JMeter  CLI  docker  Use database o file to load request parameters  Many output formats 

Key Performance Indicators 1. Number of Users 2. Hits per Second 3. Errors per Second 4. Response Time 5. Latency 6. Connect Time 7. Bytes/s (Throughput) 

Response Time vs Active Threads 

Response Time Percentiles 

Number of responses and errors 

Performance Testing Helps to Determine  How the application's response time changes if you increase or decrease the number of users/transactions.  How many users/transactions can simultaneously work with the application without a perceptible slowdown.  What load can crash the application and what happen then.  How hardware and software configuration changes affect application performance