I can't say for sure but once I restarted and quit avid link right away my performance is back to a more normal. I am noticing when I stop play and restart there is a few seconds where the video is out of sync then it hops into sync. I hadn't noticed that behavior on my work system but it is only on 2018.12.5. It seems there may be a link with the Avid link excessive memory draw and my performance issues. This is just speculation.
I have read of others complaining about sluggish performance that will go away after a computer restart but that was attributed to a memory leak that I heard was fixed in 2018.12.3. I don't know if Avid link is having a memory leak issue or what. I'll know more after I work on the system for an extended period.
---In Avid-L2@yahoogroups.com, <bigfish@...> wrote :
I'm working on my home system MacPro mid 2012 12core 2.66GHz, 64GB ram DNxIO, OS 10.12.6 QTX-680,in the tower and two titanX Gpus in a cyclone microsystems expansion chassis. I'm working on a 4K DCI 4096_2160 project Rec 709. I usually render to ProResHQ on an upper track with safe color limit and then I can get full 10bit green playback from a sequence. I just upgraded from MC 2018.12.1 to 2018.12.5 and I'm finding I get stuttery playback in 10bit green after the proresHQ render. If I re render ato DNxHRHQX I get better playback but it still stutters on occasion.
It's been a while since I've taxed my home system but I use to bring projects home on 8_9_4 and before and playback was solid after a ProResHQ render. I'm playing back of a 4 drive software raid with 4 4TB Hitachi Deskstar drives. I recently changed from a 3 way internal strip to 4 to imporove throughput. BM Speed disk shows read approx 530 mB/sec.
I have found if I toggle the timeline quality to 8 bit green I get much better playback with virtually no stutter. I'm wondering if these later MC 2018 versions are more taxing on my old MacPro and perhaps the fact that it's only 2.66GHZ is contributing to the performance issues. I realize my system is not longer qualified for the latest versions of MC but I can't upgrade at this point. Given my work similar but slightly older mid 2010 doesn't seem to show the stutter on 2018.12.1 I'm wondering if 3.33GHz CPUs account for the difference. Or is MC 2018.12.5 more taxing than 2018.12.1. I'd doubt that but thought perhaps others have experienced these types of issues.
John Moore Barking Trout Productions Studio City, CA bigfish@...
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Posted by: bigfish@pacbell.net
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