dagster-io/dagster
Feb 2025 – Feb 2025
1 Month active
Languages Used
PythonYAML
Technical Skills
Backend DevelopmentConfiguration ManagementDatabase ManagementSQLAlchemy
axelwas
PROFILE
Axelwas
Axel Waserman focused on backend reliability in the dagster-io/dagster repository, addressing a critical bug in PostgreSQL-backed event storage. He mitigated QueuePool overflow issues by removing the max_overflow cap and introducing a configurable dbPoolMaxOverflow parameter in the webserver, allowing operators to tune connection pool behavior safely. This solution, implemented using Python, SQLAlchemy, and YAML for configuration management, improved system stability during large asset materializations by preventing connection pool saturation and reducing downtime risk. Axel’s work demonstrated depth in database management and infrastructure configuration, delivering operational resilience and more predictable performance for high-load workloads in production environments.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
1Total
Bugs
1
Commits
1
Features
0
Lines of code
137
Activity Months1
Your Network
146 peopleSame Organization
@contentsquare.com3
Shared Repositories
143
Work History
February 2025
1 Commits
Feb 1, 2025February 2025: Delivered a reliability-focused bug fix for PostgreSQL-backed event storage in dagster-io/dagster. Implemented QueuePool overflow mitigation by removing the max_overflow cap (set to -1) and exposing a new config dbPoolMaxOverflow in the webserver, addressing failures during large asset materialization. Linked to the fix via commit 3fcaad69a5160923e69a781cfe9aa0570fa78862 (#27702). This enhances system stability under high-load workloads and reduces downtime risk, demonstrating strong capabilities in Python SQLAlchemy pool management, PostgreSQL integration, and configurable infrastructure. Business value: improved operational resilience, predictable performance, and easier tuning for operators.
1 Commits
Feb 1, 2025February 2025: Delivered a reliability-focused bug fix for PostgreSQL-backed event storage in dagster-io/dagster. Implemented QueuePool overflow mitigation by removing the max_overflow cap (set to -1) and exposing a new config dbPoolMaxOverflow in the webserver, addressing failures during large asset materialization. Linked to the fix via commit 3fcaad69a5160923e69a781cfe9aa0570fa78862 (#27702). This enhances system stability under high-load workloads and reduces downtime risk, demonstrating strong capabilities in Python SQLAlchemy pool management, PostgreSQL integration, and configurable infrastructure. Business value: improved operational resilience, predictable performance, and easier tuning for operators.
February 2025
Activity
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Quality Metrics
Correctness80.0%
Maintainability80.0%
Architecture80.0%
Performance60.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
PythonYAML
Technical Skills
Backend DevelopmentConfiguration ManagementDatabase ManagementSQLAlchemy
Repositories Contributed To
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