Insufficient Redis capacity

Question

Insufficient Redis capacity

Omar Bazaraa 0 Microsoft Employee

I had an Azure Managed Redis of SKU "Balanced_B0" on East US2, and as part of automating the provisioning process, I deleted the instance and attempted re-provision it using a Bicep template. However, I keep getting the following error:

Request failed due to insufficient capacity. Retry using a different Azure Managed Redis size, region or contact Azure support for assistance. (Code: AllocationFailed)

I find this wired because I just deleted my previous instance and no other deployment took place. It's also wired because I can find plenty of available compute quota in our subscription. That's why I suspect there might be a corrupted state in Azure that is preventing us from provisioning Redis.

Praveen Bandaru 11,555 Reputation points Microsoft External Staff Moderator

2026-05-02T17:26:51.4133333+00:00
Hello Omar Bazaraa

Hey Omar, it looks like you’re hitting a region‐level capacity constraint for the Balanced_B0 SKU in East US2 rather than a subscription quota issue. When you delete a Redis instance, the underlying capacity isn’t freed up instantly—and if that SKU is in high demand in that region, new deployments will fail with AllocationFailed until capacity is reclaimed or replenished.

Here’s what you can try:

Confirm deletion is fully complete • In the portal or via CLI (az redis list --resource-group <RG>) make sure there’s no Redis instance stuck in Deleting state.

Retry after a short wait • Capacity typically becomes available within minutes, but it can take longer during peak usage.

Pick a different SKU or region • Run az redis list-skus --location eastus2 to see other available SKUs. You might switch to a slightly larger size (e.g., B1) or deploy Balanced_B0 in another region with free capacity.

If you need that exact SKU in East US2 right now • Open an Azure support request to check for transient capacity shortages in that region.

Hopefully one of those approaches will get you back up and running quickly!

Reference list

• Managed Redis Cache Deployment Failure (capacity errors & retry guidance)

• Scale an Azure Cache for Redis instance (how to change SKU/region)

• Azure Redis SKUs by region CLI reference (az redis list-skus --location)

Note: This content was drafted with the help of an AI system. Please verify the information before relying on it for decision-making.