slow rendering, processor usage only 2-3%

[janci]

Can any one please advise... my render in 4000px width is going terribly slow, becasue the processor is used only at 2-3 percent. ram usage on the computer is at 85%. I have previously renderred the scene at 2000px and it all went quite fast.
thanks for any help.

[GabaCGStudio]

Can any one please advise... my render in 4000px width is going terribly slow, becasue the processor is used only at 2-3 percent. ram usage on the computer is at 85%. I have previously renderred the scene at 2000px and it all went quite fast.
thanks for any help.

is your root drive on SSD or HDD?

[janci]

root is SSD, with 51% disk usage according to windows task manager.

[GabaCGStudio]

how much is your root drive volume free? maybe you don't have enough space for pagefile cache? and which version of corona? do you test with corona 1.6?

[Cheesemsmsm]

runs out of RAM, I guess.
I faced with the same problem. My solution is to buy more RAM.

[FrostKiwi]

Which Windows do you have?
I recall a Windows Version not showing physical RAM in task manager, but the commited total.

In that case you are hitting the point, where it is being bumped into page file, which doesn't have even close to enough throughput to keep your CPU working.
In worst case use backburner's stripe render feature and it will render 2 x 2000px and stitch it together.

[Jpjapers]

How much RAM do you have and is it getting to the rendering stage and still using the same percentage or is it during the parsing and precalc?