AWS global accelerator suddenly got high ping

Based on the information provided, it appears that you're experiencing an issue with AWS Global Accelerator where the ping times have suddenly increased, particularly for connections from Egypt to a Middle East server in the UAE (Bahrain). This situation is unusual, especially since you mention that CloudFront is not experiencing the same high latency.

Global Accelerator is designed to route traffic to the optimal AWS endpoint based on factors like user location, endpoint health, and configured weights. The sudden increase in ping from 15-30ms to 150ms suggests a potential routing issue.

A few possibilities could explain this situation:

1. Temporary network issues: There might be temporary network congestion or routing problems between your location and the Global Accelerator edge locations.

2. Endpoint health: If the nearest healthy endpoint is further away due to health check failures, it could result in higher latency.

3. Configuration changes: Recent changes in traffic dials, endpoint weights, or other Global Accelerator settings could affect routing.

4. Regional network issues: There might be problems with the AWS global network in your region or between your region and the target endpoint.

To troubleshoot this issue:

1. Check the health status of your endpoints in the Global Accelerator console.
2. Review any recent configuration changes that might have affected traffic routing.
3. Compare the performance with other regions to determine if it's a localized issue.
4. Contact AWS Support for a more in-depth investigation, as they can check for any known issues or perform a detailed analysis of your traffic patterns.

It's worth noting that while Global Accelerator aims to optimize routing, it doesn't guarantee the lowest possible latency at all times. Temporary fluctuations can occur due to various factors. If the issue persists, it's recommended to engage with AWS Support to investigate the root cause and find a resolution.
Sources
How AWS Global Accelerator works - AWS Global Accelerator
What is AWS Global Accelerator? - AWS Global Accelerator
Use AWS Global Accelerator to improve application performance | Networking & Content Delivery