Samples per second increase and decrease

[tornello]

Hi!
When I do a render, for example with gpu acceleration, I see that samples per second increase gradually and then stop on a value (for example 1000).
So, I leave the computer and come back after a few hours: i find the screensaver (I have unchecked to stop the disks in mac preference), and i found indigo is going but I see that the samples per pixel restart at low values ​​and gradually grow.
How so?
if I'm not always in front of the program does it restart slowly?

Thanks if you can help me

"edited"

[galinette]

You mean samples per second, not samples per pixel (which should never decrease...)

It is likely that render stops during sleep (screensaver), this is a known issue on macs. You need to change some settings of Mac OS X for that (I don't know well, I'm on M$oft)

It then increases gradually because Indigo "smooths" the samples per second to give a less jittery value.

[tornello]

thanks galinette
I have edited...you are right: samples per second

So I turned off the screensaver ... probably there is no other way
Thanks a lot

You mean samples per second, not samples per pixel (which should never decrease...)

It is likely that render stops during sleep (screensaver), this is a known issue on macs. You need to change some settings of Mac OS X for that (I don't know well, I'm on M$oft)

It then increases gradually because Indigo "smooths" the samples per second to give a less jittery value.

[Oscar J]

You can keep your screen saver.

Instead: find the Indigo applications in the application folder, open info (cmd-I) and click the "prevent App Nap" box.

Hope it works.

[tornello]

tomorrow I will try;
thanks!