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https://issues.apache.org/jira/browse/FLINK-38961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18053497#comment-18053497
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Liu commented on FLINK-38961:
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!image-2026-01-22-17-35-54-023.png|width=706,height=234!
> Display process metrics (CPU, Memory, I/O) on TaskManager Web UI
> ----------------------------------------------------------------
>
> Key: FLINK-38961
> URL: https://issues.apache.org/jira/browse/FLINK-38961
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Web Frontend
> Reporter: Liu
> Priority: Major
> Attachments: image-2026-01-22-17-35-54-023.png
>
>
> h1. Summary
> Add a new "Process Usage" panel on the TaskManager Metrics page of the Flink
> Web UI to display process-level metrics, including CPU usage, memory (RSS),
> and I/O statistics.
> h1. Motivation
> Currently, the TaskManager Metrics page in Flink Web UI only displays JVM and
> Flink-managed memory metrics. However, users often need to monitor
> process-level resource consumption to better understand the actual resource
> usage of TaskManagers.
> When `metrics.system-resource` is enabled, Flink collects process-level
> metrics such as:
> - `Process.CPU.Usage` - CPU usage percentage of the process
> - `Process.Memory.RSS` - Resident Set Size (physical memory used by the
> process)
> - `Process.IO.Read` / `Process.IO.Write` - I/O read and write bytes
> These metrics are already available through the REST API but are not
> displayed in the Web UI, making it inconvenient for users to monitor them.
> h1. Proposed Changes
> 1. Add a "Process Usage" card on the TaskManager Metrics page
> (`task-manager-metrics.component.html`) displaying:
> - CPU: Process CPU usage percentage
> - Memory: Process RSS (Resident Set Size)
> - I/O: Combined read and write I/O bytes
> 2. Extend the metrics query in `task-manager-metrics.component.ts` to include:
> - `Process.CPU.Usage`
> - `Process.Memory.RSS`
> - `Process.IO.Read`
> - `Process.IO.Write`
> h1. Prerequisites
> Users need to enable system resource metrics by setting
> `metrics.system-resource: true` in the Flink configuration (it is disabled by
> default). If this option is not enabled, the process metrics will show as
> empty/zero.
> h1. UI Mockup
> The new "Process Usage" panel will be placed at the top of the TaskManager
> Metrics page, showing three columns:
> - CPU (percentage with 6 decimal precision)
> - Memory (humanized bytes format)
> - I/O (sum of read and write bytes, humanized)
> h1. Related Documentation
> - [System Resource
> Metrics]([https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/metrics/#system-resources])
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