nuke not using all threads help

[Morbid Angel]

Im learning nuke and working on a small project. For some reason, nuke is not using all threads when rendering. I thought it is multi threaded app? Maybe some of you have an idea how to make that happen?

[instinct]

Well nuke is definately multithreaded. And it does a pretty damn nice job at threading btw (even with ops written by idiots like me...kudos to the NDK :P )

Usually not using all threads is caused by IO issues. Keep in mind that all threads need to read/write when you process a frame. Also keep in mind that due to the way EXR was designed (if using them that is of course heh) even if you only use RGB all channels have to be read. Best performance is achieved using Zip1 compression in Scanlinebased (as opposed to VRays default output as tiled EXRs).

Regards,
Thorsten

[Morbid Angel]

might be the issue...im using multichannel exrs...so possible it affects. Thanks!