Quickly Check for Disk Bottlenecks

Q: I think my disk might be causing performance problems in my environment. How can I quickly check?

A: The easiest way to see if your disks are causing performance problems is to look at read and write delays on each physical disk. This can be done as follows:

Look at the values. Anything sustained above .030 (30 milliseconds) is typically a storage performance problem. (For high-performance storage it's typically 0.000.) Certainly when you start seeing .1, that's a huge performance impact that will affect all performance.