Added 3 CRITICAL missing health indicators that were identified during
comprehensive log analysis. These detect the most severe system issues
that require immediate attention.
NEW CRITICAL DETECTIONS:
========================
1. Memory Thrashing Detection (kswapd0)
- Detects when kernel swap daemon (kswapd0) is consuming CPU
- THE definitive indicator of severe memory pressure
- System is constantly swapping pages in/out - performance destroyed
- Alert threshold: kswapd0 CPU > 1%
- Recommendation: Immediate RAM upgrade required
2. I/O Blocking Detection (D-state processes)
- Counts processes stuck in uninterruptible sleep (D-state)
- Processes blocked waiting for I/O operations
- Indicates severe disk performance issues or hardware failure
- Alert threshold: Any D-state processes detected
- Recommendation: Check disk health, look for failing drives
3. CPU Steal Time Alerts (VM resource contention)
- Detects hypervisor stealing CPU cycles from VM
- Physical host overcommitted or experiencing contention
- Critical for cloud/VPS environments
- Alert threshold: steal time > 10%
- Recommendation: Contact hosting provider, request migration
ENHANCEMENTS ADDED:
===================
4. Top Memory Consumers Tracking
- Similar to top CPU consumers
- Aggregates MEM% across all snapshots
- Shows average memory usage by process
- Helps identify memory leaks
REPORT IMPROVEMENTS:
====================
- Added 3 new alert types to Critical Alerts Summary
- Added Top Memory Consumers section
- Added critical recommendations for new alerts with action steps
- Used red circle emoji (🔴) for CRITICAL severity
- Provided specific commands to run for diagnostics
TECHNICAL IMPLEMENTATION:
=========================
- Parse ps auxf STAT column for D-state detection
- Search top processes for kswapd pattern
- Already parsing steal time, added threshold check
- Created top_mem_processes.txt for memory tracking
- All enhancements tested on production logs
IMPACT:
=======
These 3 additions close critical gaps in system health monitoring:
- Memory thrashing: Most severe memory issue, previously undetected
- I/O blocking: Indicates imminent disk failure, critical early warning
- CPU steal: Cloud/VPS-specific issue, helps identify hosting problems
The analyzer now detects ALL critical system health issues that can
be identified from loadwatch logs.
cschantz