EBS/EC2 Performance Bottleneck Diagnostic Troubleshooter (Part 2)
Use the interactive troubleshooter below to identify your EBS/EC2 performance bottleneck symptom, review the raw evidence, understand the root cause, and apply the recommended fix.
🚨 Step 1: What specific error symptom are you experiencing?
Please click the most accurate description:
Quick Reference Table
| # | Scenario | Key Error Signal | Root Cause | The Fix |
|---|---|---|---|---|
| 5 | Processor C-State Transition Latency | "latency can interfere with processor benchmarking routines" | Temporarily idle cores in a supported CPU enter a sleep state (C-state) to save power and require time to wake up to become fully operational. | for i in \seq 1 $((N-1))`; do cpupower idle-set -d $i; done` |
| 6 | Instance Store First-Write Penalty | "the first write to any location on some instance store volumes performs more slowly than subsequent writes" | Because of the way Amazon EC2 virtualizes disks, writing to a new drive location for the first time incurs virtualization overhead. | dd if=/dev/zero bs=1M|tee /dev/sdb|tee /dev/sdc|tee /dev/sde > /dev/sdd |
| 7 | Amazon EBS Snapshot Copy Concurrency Ceiling | ResourceLimitExceeded | The destination AWS Region has hit the quota limit of 20 concurrent snapshot copy requests. | Wait for one or more of the copy requests to complete before making a new snapshot copy request. |