# Technical Document Extraction: System Performance Metrics
## Image Description
The image contains three vertically stacked line graphs representing system performance metrics over time. Each graph has distinct axis labels, legends, and data trends. The graphs are plotted against a white background with black lines and colored annotations.
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### **1. Top Graph: Alarm KPI**
- **Axis Labels**:
- **Y-Axis**: "Alarm KPI" (range: 40–90)
- **X-Axis**: Time (00:00–01:50)
- **Legend**:
- **Red Dashed Line**: "Alarm Threshold" (value: 70)
- **Pink Shaded Area**: "Host Cluster Overload" (time range: 00:40–01:00)
- **Data Trends**:
- The black line starts at ~55, fluctuates between 50–65 until 00:40.
- At 00:40, the line sharply rises to ~85, remaining above the 70 threshold until 01:00.
- Post-01:00, the line declines to ~50 by 01:50.
- **Spatial Grounding**:
- Legend positioned in the **top-right corner**.
- Pink shaded area spans **x=00:40 to x=01:00** (centered at 00:50).
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### **2. Middle Graph: VM1 KPI (Root Cause)**
- **Axis Labels**:
- **Y-Axis**: "VM1 KPI (Root Cause)" (range: 0.2–0.8)
- **X-Axis**: Time (00:00–01:50)
- **Legend**:
- **Dashed Line**: "Begin Throttling" (time: 00:40)
- **Data Trends**:
- The black line starts at ~0.6, fluctuates between 0.4–0.7 until 00:40.
- At 00:40, the line spikes to ~0.8, then declines to ~0.3 by 01:50.
- Post-00:40, the line shows a gradual downward trend with minor fluctuations.
- **Spatial Grounding**:
- Legend positioned in the **top-right corner**.
- Dashed line at **x=00:40**.
---
### **3. Bottom Graph: VM2 KPI**
- **Axis Labels**:
- **Y-Axis**: "VM2 KPI" (range: 0.2–0.7)
- **X-Axis**: Time (00:00–01:50)
- **Legend**:
- No explicit legend elements (line color matches top graph).
- **Data Trends**:
- The black line starts at ~0.4, fluctuates between 0.3–0.6 until 01:30.
- At 01:30, the line spikes to ~0.7, then declines to ~0.3 by 01:50.
- Post-01:30, the line shows a gradual downward trend with minor fluctuations.
- **Spatial Grounding**:
- No additional annotations or legends.
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### **Cross-Graph Observations**
1. **Correlation Between Metrics**:
- The "Host Cluster Overload" (00:40–01:00) in the top graph coincides with the peak in VM1 KPI (00:40) and a subsequent decline.
- VM2 KPI shows a delayed peak at 01:30, suggesting a secondary impact or delayed response.
2. **Thresholds and Anomalies**:
- Alarm KPI exceeds the 70 threshold during the overload period.
- VM1 KPI reaches its maximum value (0.8) at the start of throttling (00:40).
3. **Temporal Patterns**:
- All graphs exhibit cyclical fluctuations, with peaks occurring at 00:40 and 01:30.
- The pink shaded area in the top graph aligns with the most significant deviation in Alarm KPI.
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### **Conclusion**
The graphs illustrate a system under stress, with the "Host Cluster Overload" period (00:40–01:00) correlating with elevated Alarm KPI and VM1 KPI. The delayed peak in VM2 KPI at 01:30 suggests a cascading failure or secondary bottleneck. Throttling initiated at 00:40 appears to mitigate VM1 KPI but does not prevent subsequent anomalies in VM2 KPI.
