percona/percona-server-mongodb
Mar 2026 – Jun 2026
3 Months active
Languages Used
C++JavaScriptYAML
Technical Skills
C++JavaScriptMongoDBback end developmentdatabase optimizationperformance monitoring
Hagar Mohamed
PROFILE
Hagar Mohamed
Over a three-month period, contributed six features to percona/percona-server-mongodb, focusing on backend development, testing, and database optimization. Delivered disaggregated storage configurations for Golden Query Suites, enabling flexible storage options and improved test coverage, and introduced nanosecond-precision timing for query optimization. Enhanced QueryTester usability by implementing default run modes and partial-run sentinels to prevent misuse of incomplete outputs, while realigning ownership for clearer accountability. Added property-based tests for aggregation pipelines using $top and $bottom accumulators to validate distinct scan optimizations, and reorganized ownership metadata for maintainability. Work demonstrated proficiency in C++, JavaScript, MongoDB, and testing frameworks.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
8Total
Bugs
0
Commits
8
Features
6
Lines of code
1,072
Activity Months3
Your Network
642 peopleWork History
June 2026
2 Commits • 2 Features
Jun 1, 2026June 2026: Delivered two targeted enhancements in percona/percona-server-mongodb, focusing on reliability and maintainability. Key features include property-based tests for aggregation pipelines ($sort/$group) using $top/$bottom accumulators to validate distinct-scan optimizations, and a reorganization of ownership metadata for validate_db_metadata_command.js to improve maintainability and owner traceability. No major bug fixes were logged this month. Overall impact: increased test coverage, reduced regression risk in optimization paths, and clearer ownership for faster onboarding. Technologies/skills demonstrated: property-based testing, aggregation pipelines, code ownership management, and Git metadata traceability.
2 Commits • 2 Features
Jun 1, 2026June 2026: Delivered two targeted enhancements in percona/percona-server-mongodb, focusing on reliability and maintainability. Key features include property-based tests for aggregation pipelines ($sort/$group) using $top/$bottom accumulators to validate distinct-scan optimizations, and a reorganization of ownership metadata for validate_db_metadata_command.js to improve maintainability and owner traceability. No major bug fixes were logged this month. Overall impact: increased test coverage, reduced regression risk in optimization paths, and clearer ownership for faster onboarding. Technologies/skills demonstrated: property-based testing, aggregation pipelines, code ownership management, and Git metadata traceability.
June 2026
April 2026
3 Commits • 2 Features
Apr 1, 2026April 2026 monthly summary for percona/percona-server-mongodb focusing on QueryTester usability improvements and governance alignment. Delivered default-to-run behavior when --out is specified without an explicit --mode, and introduced a partial-run sentinel to flag incomplete outputs and prevent misuse. Fixed compatibility between the -n flag and run mode to ensure reliable test execution. Realigned ownership of QueryTester to the query-optimization-correctness team to reflect responsibility for optimization tests, improving accountability and test coverage.
April 2026
3 Commits • 2 Features
Apr 1, 2026April 2026 monthly summary for percona/percona-server-mongodb focusing on QueryTester usability improvements and governance alignment. Delivered default-to-run behavior when --out is specified without an explicit --mode, and introduced a partial-run sentinel to flag incomplete outputs and prevent misuse. Fixed compatibility between the -n flag and run mode to ensure reliable test execution. Realigned ownership of QueryTester to the query-optimization-correctness team to reflect responsibility for optimization tests, improving accountability and test coverage.
March 2026
3 Commits • 2 Features
Mar 1, 2026March 2026: Delivered two key features for percona/percona-server-mongodb that enhance testing flexibility and performance visibility, with no major bugs fixed this month. Key outcomes: 1) Disaggregated storage configurations for Golden Query Suites enabling flexible storage options and improved testing capabilities. 2) Nanosecond-precision timing for query optimization with expanded test coverage to validate optimization timing across scenarios. Business impact includes more robust test coverage, finer performance profiling, and groundwork for flexible storage deployments across Golden Query Suites. Technologies demonstrated: storage configuration management, nanoscale performance instrumentation, expanded test automation, and Git-based workflows.
3 Commits • 2 Features
Mar 1, 2026March 2026: Delivered two key features for percona/percona-server-mongodb that enhance testing flexibility and performance visibility, with no major bugs fixed this month. Key outcomes: 1) Disaggregated storage configurations for Golden Query Suites enabling flexible storage options and improved testing capabilities. 2) Nanosecond-precision timing for query optimization with expanded test coverage to validate optimization timing across scenarios. Business impact includes more robust test coverage, finer performance profiling, and groundwork for flexible storage deployments across Golden Query Suites. Technologies demonstrated: storage configuration management, nanoscale performance instrumentation, expanded test automation, and Git-based workflows.
March 2026
Activity
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Quality Metrics
Correctness97.6%
Maintainability87.6%
Architecture92.6%
Performance87.6%
AI Usage22.4%
Skills & Technologies
Programming Languages
C++JavaScriptYAML
Technical Skills
C++C++ developmentConfiguration ManagementDevOpsJavaScriptMongoDBaggregationback end developmentbackend developmentdatabase managementdatabase optimizationfile I/O operationsperformance monitoringtestingtesting frameworks
Repositories Contributed To
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