Mit Desai created YUNIKORN-3119:
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Summary: Add Metrics for Monitoring Applications Attempted in Each
Scheduling Cycle
Key: YUNIKORN-3119
URL: https://issues.apache.org/jira/browse/YUNIKORN-3119
Project: Apache YuniKorn
Issue Type: Improvement
Components: core - scheduler
Reporter: Mit Desai
Assignee: Mit Desai
h2. Summary
Add new observability metrics to track the number of applications attempted
during each scheduling cycle. This enhancement will improve debugging
capabilities for scheduling latency issues by providing visibility into
scheduling cycle efficiency and application processing patterns.
h2. Background
When debugging YuniKorn scheduling performance issues, it's important to
understand not just how long scheduling takes, but also how many applications
are being processed in each cycle. Currently, YuniKorn logs timing information
but lacks visibility into the number of applications attempted per scheduling
cycle, making it difficult to correlate scheduling latency with workload
characteristics.
h2. Proposed Solution
Add a new metric {{applicationsTried}} that tracks and reports the number of
applications attempted during each scheduling cycle. This metric will be
integrated into existing logging and monitoring infrastructure.
h3. Key Features:
# {*}Applications Attempted Counter{*}: Track the number of applications
processed in each scheduling cycle
# {*}Integration with Existing Metrics{*}: Seamlessly integrate with current
timing and allocation metrics
# {*}Debugging Support{*}: Provide correlation data between application count
and scheduling latency
# {*}Minimal Performance Impact{*}: Lightweight counter that doesn't affect
scheduling performance
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