mirror of
https://github.com/ClusterCockpit/cc-backend
synced 2026-03-24 00:27:29 +01:00
Jan Eitzinger
af86456ab9
Entire-Session: 0943a044-b17e-4215-8591-c1a0c816ddf0 Entire-Strategy: manual-commit Entire-Agent: Claude Code Ephemeral-branch: entire/02f82c2-e3b0c4
35 lines
1007 B
Markdown
35 lines
1007 B
Markdown
# Session Context
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## User Prompts
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### Prompt 1
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Implement the following plan:
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# Fix: Memory Escalation in flattenCheckpointFile (68GB+)
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## Context
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Production gops shows `flattenCheckpointFile` allocating 68GB+ (74.89% of memory). The archiving pipeline accumulates ALL metric data from ALL hosts into a single `[]ParquetMetricRow` slice before writing to Parquet. For large HPC clusters this is catastrophic. Additionally, the `SortingWriterConfig` in the parquet writer buffers everything again internally.
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## Root Cause
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Two-layer unbounde...
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### Prompt 2
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Are the any other cases with memory spikes using the Parquet Writer, e.g. in the nodestate retention?
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### Prompt 3
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[Request interrupted by user for tool use]
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### Prompt 4
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Compare the archive writer implementation with @~/tmp/cc-backend/pkg/metricstore/parquetArchive.go . Compare and explain differences.
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### Prompt 5
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Add an Info logmessage in archiveCheckpoints that archving started and provide timing information how long it took.
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