I will consistently have issues getting playback to happen, while trying to watch things on plex from my local computer. I am connected to localhost so there should be zero buffering. Why is there buffering happening (especially buffering that takes a massive amount of time)
Sounds like you’re transcoding. What platform/client are you using? If Plex Web and on Windows or Mac, try Plex Media Player instead. Download at https://www.plex.tv/downloads/. PMP direct plays many more items than Plex Web.
How to check for transcoding (besides CPU at 100% & fans sound like leaf blowers):
During playback, open up a Plex Web session to your Plex server. Go to Status -> Now Playing. http://127.0.0.1:32400/web/index.html#!/status/playing (substitute appropriate IP address if on a different computer).
For transcoding, the output is "converting (throttled) and the cpu is at zero percent. I have the latest gen i7 and the computer is idle except for the video playback. There isn’t an issue with throttle the device.
It appears to be network related, because I mostly get this issue when my network is down or slow, which makes no sense.