instance limit increase EC2

I understand your urgency regarding the EC2 instance limit increase request for the x1e.xlarge instance. Here are some steps you can take to help process your request:

1. First, it's important to note that quota increase requests don't receive priority support, and processing times can vary. However, three days is an unusually long wait time for an unassigned case.

2. Since your case is still unassigned after three days, it's recommended to follow up on your request. You can do this by logging into the AWS Support Center and adding a comment to your existing case. Provide any additional information that might be relevant to your request, such as the urgency of your need and any specific business impact.

3. If you haven't already, ensure that you've provided a clear justification for why you need the quota increase. This can help expedite the review process.

4. You might also want to check if there are any EC2 High Memory instances available in your region that could meet your needs. AWS has been expanding the availability of these instances, which are designed for large in-memory databases and applications.

5. If you have an AWS account representative or technical account manager, reach out to them directly. They may be able to help escalate your case or provide additional guidance.

6. As an alternative, you could consider using the AWS CLI to request the quota increase if you haven't already. This requires attaching the AWS managed policy 'ServiceQuotasFullAccess' to your IAM principal or adding 'iam:CreateServiceLinkedRole' to your existing IAM policy.

7. If none of these steps yield results, you may want to open a new support case specifically about the delay in processing your original request.

Remember, while waiting for the quota increase, you can monitor your current EC2 usage against existing limits using Amazon CloudWatch metrics. This can help you plan and manage your resources in the meantime.

Lastly, keep in mind that AWS has been moving towards vCPU-based On-Demand Instance limits, which might affect how your quota is calculated and applied. Be sure to check your current limits in the EC2 console or Service Quotas console to understand your current usage and available capacity.
Sources
Requesting a quota increase - Service Quotas
vCPU-based On-Demand Instance Limits are Now Available in Amazon EC2