DS415Play - CPU Usage 90% plus when viewing movie

I run a DS415Play, almost exclusively for PLEX. Over the past year, it lags. I will be attempting to load a video, perhaps on my phone or AppleTV and it takes forever. I was doing some investigations today, was watching a video, checked the CPU usage sure enough, nearly 100%. Stopped video, CPU usage dips down to 25ish%. Restart video, jumps back up to nearly 90+%. Ive always kept PLEX UTD - running version 1.21.0.3711. DSM is UTD 1.21.0.3711. Is it that my NAS is just too old to keep up these days or is PLEX too bloated of a program for my 5 year old NAS? TIA for any comments/feedback…

For starters you could check out the “now playing” tile for that playback on the Plex server dashboard. This should show you not only how much CPU/memory/network load you got but also what’s happening “under the hood” – namely if the video requires transcoding and if so what parts of the file are being transcoded etc.).
Exemplary screenshot from the "now playing" section

im thinking its the transcoding of 1080p…maybe time for an upgrade…

I have a brand new synology 918+ and i was getting high cpu loads. I added a plex pass to take advantage of full hardware encoding and that made all the difference for me. I think its also worth making sure if you want to use full encoding, the NAS fully supports it.

Thats what I was thinking too old to keep up…

what would you move to a 420+?

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