# Recalculate Blob Store Storage Task Performance Testing

In Sonatype Nexus Repository 3.69.0, we introduced the _Repair - Recalculate blob store storage_ task that calculates the total space occupied by blobs in a blob store. We are providing the performance testing information below to help you appropriately plan and allocate resources for using this task.

## Environment Configuration

The performance testing environment for testing the _Repair - Recalculate blob store storage_ task included the following:

- m5d.2xlarge EC2 Instance
- An S3 bucket used to store assets
- A Gatling script used to populate assets
- Blob store containing 6 million blobs

## Collected Data

Sonatype collected the following findings when running the _Repair - Recalculate blob store storage_ task for **7 hours**:

- Task processes ~11 blobs per second
- After 7 hours, the task had counted ~280,000 blobs
- Processing speed was consistent throughout entire test duration

## Conclusions and Performance Projections

The _Repair - Recalculate blob store size_ task runs at a constant processing rate. Based on test results, the estimated processing times are:

- 5 million blobs: approximately 126 hours (5.2 days)
- 20 million blobs: approximately 505 hours (21 days)

Given the lengthy processing time for running this task, it may not be appropriate for very large blob stores.

**Note**  
You cannot stop the task once it starts.  
The blob count and used size update continuously while the task runs. Values may appear inaccurate until the task completes.