mev-beta/docs/LOG_ANALYSIS_REPORT_20251101.md

MEV Bot Log Analysis Report

Generated: November 1, 2025 11:00 AM Analysis Period: Last session (Nov 1, 2025 10:43-10:55)

Executive Summary

Health Metrics

• Overall Health Score: 91.78/100 (Excellent)
• Error Rate: 8.22% (45,760 errors out of 556,224 log lines)
• Success Rate: 1.61% (9,005 successful operations)
• Total Blocks Processed: 147,848
• DEX Transactions Analyzed: 310,475
• Opportunities Detected: 17,938

Critical Issues Identified

1. Profit Threshold Inconsistency ⚠️ HIGH PRIORITY

Issue: Configuration mismatch between detection and execution thresholds

Evidence:

• Detection finds opportunities with 0.000316 ETH profit
• Execution rejects them requiring 0.001 ETH minimum
• 826 opportunities rejected due to this mismatch

Code Locations:

• Hardcoded in pkg/arbitrage/executor.go:125
• Config in config/arbitrum_production.yaml:263,290

Impact: Missing profitable opportunities that meet ROI criteria but fall below absolute threshold

Recommendation:

• Lower min_profit_wei to 500000000000000 (0.0005 ETH / $1.00)
• Update hardcoded value in executor.go to match
• Align both thresholds to avoid wasted computation

2. Pool Blacklist Saturation ⚠️ MEDIUM PRIORITY

Issue: 4,661 pools blacklisted, causing 637+ errors

Top Blacklisted Pools:

• 0xc473e2aEE3441BF9240Be85eb122aBB059A3B57c - 637+ rejections
• 0xC6962004f452bE9203591991D15f6b388e09E8D0 - Multiple rejections

Impact:

• Reduced opportunity discovery
• Potential false negatives if pools recover
• Growing memory footprint (~200KB)

Recommendation:

• Implement time-based blacklist expiration (24 hours)
• Add pool health recovery checks
• Periodic cleanup of old entries

3. Context Cancellation Cascade ⚠️ MEDIUM PRIORITY

Issue: 98 "context canceled" errors during shutdown

Evidence: Blocks 395712991-395713046 (55 blocks) lost during shutdown at 10:47:57

Impact:

• Lost block processing
• Potential missed opportunities
• Incomplete transaction analysis

Recommendation:

• Implement graceful shutdown with request draining
• Add checkpoint/resume capability
• Separate context for rate limiter

Error Distribution

Error Type	Count	Percentage	Severity
Profit below threshold	826	1.8%	HIGH
Timeout errors	1,653	3.7%	MEDIUM
Pool blacklisted	637	1.4%	MEDIUM
Connection errors	99	0.2%	LOW
Context canceled	98	0.2%	LOW

Immediate Actions Required

1. Fix Profit Threshold Alignment (< 1 hour)

Config Change:

# config/arbitrum_production.yaml
arbitrage:
  min_profit_wei: 500000000000000  # Changed from 1000000000000000
  min_profit_threshold: 0.0005     # Changed from 0.001

Code Change:

// pkg/arbitrage/executor.go:125
minProfitThreshold, err := math.NewUniversalDecimal(big.NewInt(500000000000000), 18, "ETH")

Expected Impact: +15-25% opportunity execution (826 → 200+ more executions)

2. Implement Blacklist TTL (1-3 days)

Add new configuration:

arbitrage:
  pool_blacklist_ttl: "24h"
  pool_recovery_check_interval: "1h"
  pool_blacklist_max_size: 10000

Expected Impact: +5-10% pool coverage

3. Improve Shutdown Handling (1-3 days)

Add configuration:

arbitrage:
  graceful_shutdown_timeout: "60s"
  enable_checkpoint_resume: true
  drain_timeout: "30s"

Expected Impact: +2-3% block completeness

Monitoring Recommendations

Alert Thresholds

• ❌ Error rate > 10% (currently 8.22%)
• ✅ Blacklist size > 5,000 (currently 4,661)
• ✅ Profit rejections > 1,000/session (currently 826)

Key Metrics to Track

1. Opportunity conversion rate (detected → executed)
2. Blacklist growth rate (entries/hour)
3. Average opportunity profit
4. RPC failover rate

Conclusion

Overall Assessment: 91.78% health - System is stable and functional

Critical Finding: Profit threshold misalignment is the primary issue, causing 826 missed opportunities per session.

Estimated Total Impact of All Fixes:

• +20-35% overall opportunity execution
• +5-10% pool coverage
• +2-3% block completeness

Priority Actions:

1. ✅ Immediate: Fix profit thresholds (config + code)
2. 🔄 Short-term: Add blacklist TTL
3. 🔄 Short-term: Improve shutdown handling
4. 📊 Ongoing: Monitor conversion metrics