Originally Posted by maxse
Guys, anyone know the processor recommendations on these for Transcoding with Plex?
Plex recommends 2.4Ghz Core2 Duo. Plex simply grabs every core it can to start transcoding, spikes the CPU, fills the buffer, then the CPU usage drops down to enough so it can keep the buffer going without interruption.
I run my plex servers on an ESX 5.1 server, so out of curiosity I tested what happens with plex and 4 clients added in over about 10 minutes, all transcoding.
The VM is running 64 bit Debian linux and has 4 cores and 4GB RAM assigned, the CPU on the host is a XEON X5650 running at 2.67Ghz.
The clients were my local web browser, an android phone, and two android tablets. All the clients except my desktop were streaming over Wireless N.
The movies are 1:1 bluray rips to MK; Amelie, Zombieland, Baraka, and Wreck It Ralph.
It's pretty straightforward what happens. Plex transcoded the movies on the phone and tablets down to 1024x576, the browser movie was playing at a 940x480. Each movie started in about 5 seconds. The time to start transcoding stream 4 was not perceptibly different than stream 1. Memory usage never went above approximately 3.2GB.
First movie - plex grabs all 4 cores to buffer and transcode, spikes the CPU, then settles down.
Second movie - plex spikes the CPU again, then settles down.
Third movie, plex spikes the CPU, then settles down, however you can see total CPU Usage rising.
Fourth movie, plex spikes the CPU, CPU stays maxxed until I stop Baraka, then it drops.