prestodb/presto
Dec 2024 – May 2026
2 Months active
Languages Used
JavaSQL
Technical Skills
Backend DevelopmentDistributed SystemsJavabackend developmentperformance optimizationsystem design
Arjun Gupta
PROFILE
Arjun Gupta
Worked on the prestodb/presto repository, delivering both a targeted bug fix and a new feature over two months. Addressed session property initialization issues for Presto-On-Spark by updating the SessionPropertyManager to properly initialize and propagate new Java features and node spilling configurations, improving test reliability and stability. Later, implemented a high-priority query bypass for cluster-overload throttling, introducing a configuration that allows designated resource groups to bypass admission gates under heavy load while maintaining per-group limits. These contributions involved backend development, distributed systems, and performance optimization, utilizing Java and SQL to enhance system robustness and operational flexibility in production environments.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
2Total
Bugs
1
Commits
2
Features
1
Lines of code
467
Activity Months2
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778 peopleSame Organization
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Adnan AkhundovMember
Amir AyupovMember
Adan MorenoMember
Adarsh RajanikanthMember
Afraz SiddiquiMember
andrewjcgMember
agelunMember
Arnav AghavMember
Pooja AgarwalMember
Work History
May 2026
1 Commits • 1 Features
May 1, 2026May 2026: Delivered a high-priority query bypass for cluster-overload throttling in prestodb/presto. The feature adds cluster-overload.bypass-resource-groups config to allow designated resource groups to bypass the admission gate under heavy load while preserving per-group limits. It includes path-based bypass eligibility, startup validation, and a JMX counter throttlingBypassCount for observability. Changes require a coordinator restart to apply. Business impact: reduces wait times for critical workloads during incidents without relaxing core resource controls.
1 Commits • 1 Features
May 1, 2026May 2026: Delivered a high-priority query bypass for cluster-overload throttling in prestodb/presto. The feature adds cluster-overload.bypass-resource-groups config to allow designated resource groups to bypass the admission gate under heavy load while preserving per-group limits. It includes path-based bypass eligibility, startup validation, and a JMX counter throttlingBypassCount for observability. Changes require a coordinator restart to apply. Business impact: reduces wait times for critical workloads during incidents without relaxing core resource controls.
May 2026
December 2024
1 Commits
Dec 1, 2024December 2024 monthly summary for prestodb/presto focused on stabilizing Presto-On-Spark session properties. Implemented a targeted bug fix that initializes new Java features and node spilling configurations and propagates them to testing session properties, improving reliability of session initialization in test environments and reducing flaky test outcomes.
December 2024
1 Commits
Dec 1, 2024December 2024 monthly summary for prestodb/presto focused on stabilizing Presto-On-Spark session properties. Implemented a targeted bug fix that initializes new Java features and node spilling configurations and propagates them to testing session properties, improving reliability of session initialization in test environments and reducing flaky test outcomes.
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Quality Metrics
Correctness90.0%
Maintainability80.0%
Architecture90.0%
Performance70.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
JavaSQL
Technical Skills
Backend DevelopmentDistributed SystemsJavabackend developmentperformance optimizationsystem design
Repositories Contributed To
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