FEAT: Add stress test pipeline and migrate it to new 1ES Pool/Images#432
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gargsaumya merged 9 commits intomainfrom Apr 6, 2026
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FEAT: Add stress test pipeline and migrate it to new 1ES Pool/Images#432gargsaumya merged 9 commits intomainfrom
gargsaumya merged 9 commits intomainfrom
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Pull request overview
Adds a new scheduled/manual OneBranch pipeline to run stress testing and introduces a new multi-threaded stress test suite for mssql-python aimed at validating pooling and concurrency behavior under sustained and high-concurrency load.
Changes:
- Added a new
tests/test_020_multithreaded_stress.pymodule with multi-threaded stress tests and a helper runner/metrics models. - Added
OneBranchPipelines/stress-test-pipeline.ymlto run the stress suite on Windows (LocalDB) and Linux (Docker SQL Server) on a daily schedule or manually.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 12 comments.
| File | Description |
|---|---|
| tests/test_020_multithreaded_stress.py | New concurrency-focused stress tests with a multi-threaded runner and workload scenarios (matrix, sustained load, lifecycle, heavy queries). |
| OneBranchPipelines/stress-test-pipeline.yml | New scheduled pipeline to provision DBs (LocalDB/Docker) and execute/publish stress + performance stress tests on Windows and Linux agents. |
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saurabh500
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…ss.py and fix Black formatting
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/azp run |
|
Azure Pipelines successfully started running 1 pipeline(s). |
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…n pipeline - Replace @pytest.mark.stress_threading with @pytest.mark.stress in test_020_multithreaded_stress.py - Update stress-test-pipeline.yml to use -m stress instead of -m stress_threading - pytest.ini addopts = -m 'not stress' now covers both test_011 and test_020
📊 Code Coverage Report
Diff CoverageDiff: main...HEAD, staged and unstaged changesNo lines with coverage information in this diff. 📋 Files Needing Attention📉 Files with overall lowest coverage (click to expand)mssql_python.pybind.logger_bridge.cpp: 59.2%
mssql_python.pybind.ddbc_bindings.h: 67.8%
mssql_python.row.py: 70.5%
mssql_python.pybind.logger_bridge.hpp: 70.8%
mssql_python.pybind.ddbc_bindings.cpp: 73.9%
mssql_python.pybind.connection.connection.cpp: 75.3%
mssql_python.__init__.py: 77.3%
mssql_python.ddbc_bindings.py: 79.6%
mssql_python.pybind.connection.connection_pool.cpp: 79.6%
mssql_python.connection.py: 85.2%🔗 Quick Links
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sumitmsft
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Apr 6, 2026
jahnvi480
approved these changes
Apr 6, 2026
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Summary
This pull request adds a comprehensive suite of multi-threaded stress tests for the
mssql-pythonpackage. The new tests cover a wide range of concurrency scenarios, sustained load, pool lifecycle, and heavy query scaling to ensure robust performance and stability under high-load conditions. The tests are cross-platform, feature deterministic shutdowns, and include adaptive validation of error rates.Concurrency and load testing:
test_concurrency_matrix) that runs queries with varying thread counts and connection pooling settings, validating error rates at different concurrency levels.test_sustained_load) that run multiple threads for extended durations to simulate real-world high-load situations.test_heavy_query_scaling) with large result sets and high thread counts to stress test the connection pool.Connection pool management:
test_pool_lifecycle_cycles) to repeatedly enable and disable connection pooling, verifying deterministic shutdown and resource cleanup.Test infrastructure and utilities:
ThreadResult,StressResult) and a runner class (MultiThreadedQueryRunner) for collecting detailed metrics and managing