barracuda wrote:Frank Engel wrote:Is there any footage being used which is not being generated from within Fusion?
What is disk usage like during the render? If the disk(s) can't keep up this could also be a bottleneck to rendering performance.
SSD Disks all of them. I Use only SSD.
That doesn't tell me anything.
Unfortunately macOS does not include any utility I can find to monitor I/O service times.
There is a utility called ioping which can be installed via Homebrew (information here:
https://www.cyberciti.biz/faq/linux-fre ... th-ioping/) which can be used to measure this.
Check the service time of each disk being used by Fusion during a render; start ioping before starting the render in Fusion and look to see if the service time increases significantly when the render starts. A small increase should be expected, but a significant increase suggests your render performance may be limited by the speed at which the data is being accessed from the disk (SSD will typically be faster than a hard drive but is still subject to at least some of the same performance rules; they are not infinitely fast).
If your data is spread across multiple disks and if there is an I/O bottleneck then determining one which shows high service times may provide a hint as to how to spread things out or where improvements may need to be made.