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poimen-memory/tasks/M3.8.3-compression-benchmarks.md
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docs: update M3.8 task specs (M3.8.3-6 detailed)
M3.8.3  COMPLETE (7 tests)
- MetricsCollector: per-project aggregation
- Structured logging (tracing)
- Prometheus export format

M3.8.4  IMPLICIT (no work needed)
- Query path already clean (no compression)
- Only cache_metrics() uses optimizer (for observability)

M3.8.5  ACTIVE (16 tests spec'd)
- Compression ratio benchmarks (5 tests: log/json/text/diff/mixed)
- Search quality validation (8 tests: pgvector/opensearch/fusion)
- Performance baseline (3 tests: latency/throughput/memory)

M3.8.6  PENDING (13 gate assertions)
- Safety (6): no data loss, deterministic, structure preservation
- Performance (4): latency p99 <3ms, throughput 1000+/sec, memory <100MB
- Quality (3): compression targets, search improvement, cache accuracy

Project progress: 64/78 complete (82%), 8/13 gates green
Total M3.8 tests: 103 (62+5+7+0+16+13)
2026-08-28 11:46:09 -07:00

2.2 KiB

M3.8.3 — Metrics & Monitoring (UPDATED)

Field Value
Phase M3.8 — Context optimization
Size M — 1 day
Status COMPLETE
Depends M3.8.1, M3.8.2
Blocks M3.8.4

Deliverables Completed

MetricsCollector (7 tests)

  • Per-project aggregation of OptimizationMetrics
  • Merge metrics from multiple optimization runs
  • Structured logging via tracing
  • Prometheus-compatible export format

Test Coverage (7 tests)

  • test_collector_merge_single_project — Store and retrieve per-project metrics
  • test_collector_merge_multiple_projects — Aggregate across projects
  • test_collector_merge_aggregates — Multiple runs per project
  • test_collector_nonexistent_project — Handle missing project gracefully
  • test_collector_per_compressor_stats — Track per-compressor breakdowns
  • test_prometheus_export_format — Valid Prometheus text format
  • test_prometheus_compression_ratio — Correct ratio calculations

Prometheus Export

  • Counter: m3_8_optimization_records_total
  • Gauge: m3_8_optimization_input_bytes_total
  • Gauge: m3_8_optimization_output_bytes_total
  • Gauge: m3_8_optimization_compression_ratio
  • Per-compressor stats with labels

Integration Pattern

use mem_ingest::{MetricsCollector, optimize_record_with_metrics, OptimizationMetrics};
use std::sync::{Arc, Mutex};

let optimizer = ContextOptimizer::from_env()?;
let collector = MetricsCollector::new();

for project_id in projects {
    let metrics = Arc::new(Mutex::new(OptimizationMetrics::default()));
    
    for record in source.records() {
        let optimized = optimize_record_with_metrics(
            record,
            &optimizer,
            &metrics,
        )?;
        embed_and_index(&optimized)?;
    }
    
    let final_metrics = metrics.lock().unwrap().clone();
    collector.merge_project(project_id, final_metrics);
}

// Log summary
collector.log_all_projects();

// Export for Prometheus
let prometheus_text = collector.prometheus_export();
http_server.register_metrics_endpoint("/metrics", prometheus_text);

Status

Complete and Production-Ready

  • All 7 tests passing
  • Prometheus format validated
  • Ready to integrate into rebuild pipeline