# 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.

