roonAppliance hangs every few hours for 30-60 mins - roon not useable

Core Machine (Operating system/System info/Roon build number)
Specs of my server:
Windows 10 Pro 64bit
Intel Core2 Quad CPU Q9400 @ 2.66GHZ
Mainboard Gigabyte P35-DS3P
DDR2 RAM 4,00 GB
Realtek PCIe GBE Family Controller
Samsung SSD 850 EVO 500GB
Roon Server 1.7 Build 528 64bit

Network Details (Including networking gear model/manufacturer and if on WiFi/Ethernet)

Netgear Router WNDR4500
Netgear WNDR3800 as Access Point
Synology NAS with music files - 1 GBit Ethernet
Windows 10 Server with roon server - 1 GBit Ethernet
iMac with Roon as Client - 1GBit Ethernet
Macbook Pro with Roon as Client - 1 GBit Ethernet / WiFi
iPhone, iPad as Roon Remote - WiFi
2 Raspberry Pi as Roon Bridge - 1GBit Ethernet

Audio Devices (Specify what device you’re using and its connection type - USB/HDMI/etc.)

iMac with Roon as Client - HDMI to Yamaha Receiver
Macbook Pro with Roon as Client - direct output
Raspberry Pi as Roon Bridge - Analog Out
Raspberry Pi as Roon Bridge - USB to DAC

Description Of Issue

After booting my Windows 10 Server (after a Windows update for example) it takes the roon server a few minutes to rescan the files of my library. During this time, I have no chance of accessing the server with any client, only the pulsating roon icon appears. After this time roon works as it should. I can access the server with any remote, can play local files and Tidal music files on every endpoint without a problem.
But - and now comes my problem - after about a day or so the service roonAppliance starts doing something. CPU usage is at about 25-40% (more cpu, ram, etc infos see screenshots). When it is doing this, roon is nearly not useable! Searching locally or in Tidal takes 2 minutes until something appears on screen. Playback is impossible. This state lasts from 30-60 minutes and appears every few hours. When its done, roon is useable again. After 2-3 days roonAppliance does not recovery anymore after 30-60 minutes and stays in that state. The only thing, I can do then, is to reboot my server completely.
I know, that 4GB of RAM are not enough for the number of files I have, but I do not understand why it is working for hours and then it is suddenly doing something for 30-60 minutes and everything hangs.
I have set rescan of all my storage locations to ‚only at startup’ and I have no database backup configured. So I do not know what tasks roon should do every few hours, while I do not even use it.
Could you please start logging my server to see what the problem could be?

KR Peter

If you have a large library that cpu is underspecced as well even compared to a gen 8 i3 NUC.

So you’re asking for trouble. Not enough memory leads to the system swapping out memory to HD/SSD and things start to become really slow.

So your music files are not on a local file system. Your rescan setting might just get ignored. See also:


Because we need to detect whether the storage device is still on and available, we do check on a regular basis that the NAS is still on and available

Thank you for your feedback. As I said, I know that RAM and CPU are not up to date, but what I do not understand is, why it works without problems for hours and then suddenly has massive problems! I also forgot to say that it worked with no problems under Windows 7 with the same amount of files. Since Windows 10 I experience these problems. Thats why I‘d like @support to start logging on my server.
Because just checking if the NAS is still online cant take 30-60 minutes, can it?

KR Peter

Hi @Peter_Seemann,

What is the current size of your Roon collection? How many tracks/albums do you have listed under the Overview tab? Is there any change in behavior if you temporarily disable your NAS storage under Roon Settings -> Storage?

Hi @noris!
I have 18.300 albums / 250.000 tracks at the moment.
Is this too much for my server setup?
I could try disabling the NAS storage.

KR Peter

I’d say so. Try disabling the local storage and just stream and see what happens. 4 clients and a underspecced processor and memory. Hmmm

I would try temporarily disabling the NAS storage @Peter_Seemann. See if that helps Roon work better, if it does, we have located the source of the issue.

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