Checkpoint: bf29af79b268

Entire-Session: 0943a044-b17e-4215-8591-c1a0c816ddf0
Entire-Strategy: manual-commit
Entire-Agent: Claude Code
Ephemeral-branch: entire/02f82c2-e3b0c4

bf/29af79b268/0/context.md

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+# Session Context
+
+## User Prompts
+
+### Prompt 1
+
+Implement the following plan:
+
+# Fix: Memory Escalation in flattenCheckpointFile (68GB+)
+
+## Context
+
+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.
+
+## Root Cause
+
+Two-layer unbounde...
+
+### Prompt 2
+
+Are the any other cases with memory spikes using the Parquet Writer, e.g. in the nodestate retention?
+
+### Prompt 3
+
+[Request interrupted by user for tool use]
+
+### Prompt 4
+
+Compare the archive writer implementation with @~/tmp/cc-backend/pkg/metricstore/parquetArchive.go . Compare and explain differences.
+
+### Prompt 5
+
+Add an Info logmessage in archiveCheckpoints that archving started and provide timing information how long it took.
+