<- Glossary

What are the signs of a disk usage bottleneck?

A disk usage bottleneck is often detectable by high disk wait times and low IOPS. In addition, measuring disk throughput and latency can help to identify a disk usage bottleneck.

If you are seeing high disk wait times, low IOPS, or low throughput on your disks, then you may have a disk usage bottleneck. One way to determine if this is the case is to measure your disk latency and throughput. By doing so, you can get an idea of how much capacity your disks currently have relative to their maximum throughput. If the disks are not able to keep up with the workload, then you may have a disk usage bottleneck.

Symptoms of a disk usage bottleneck may include:

To determine if you are experiencing a disk bottleneck, you should measure your disk's throughput and iops. You can use the iostat command to collect this information. The following example shows how to collect data for a 10-second period:

iostat -d 10

This will print out the average number of transactions per second, as well as the average response time for transactions. If your response time is high and your throughput is low, you may be experiencing a disk bottleneck.

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