# Full CPU Usage with Syncthing 2.1.6 on Synology DS with DSM 7.4.1
**URL:** https://forum.syncthing.net/t/full-cpu-usage-with-syncthing-2-1-6-on-synology-ds-with-dsm-7-4-1/27213
**Category:** Support
**Created:** [October 13, 2026, 9:05am UTC](https://forum.syncthing.net/t/full-cpu-usage-with-syncthing-2-1-6-on-synology-ds-with-dsm-7-4-1/27213 "2026-10-13T09:05:19Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@clathi06](https://forum.syncthing.net/u/clathi06)
#### Post date: [October 13, 2026, 9:05am UTC](https://forum.syncthing.net/t/full-cpu-usage-with-syncthing-2-1-6-on-synology-ds-with-dsm-7-4-1/27213/1 "2026-10-13T09:05:19Z")
A couple of days ago I mentioned slow response of the shares on my DS-723+
top says: PID USER PR NI VIRT RES %CPU %MEM TIME+ S COMMAND 18179 sc-sync+ 31 11 2147.0m 355.6m 115.1 1.109 170:35.19 S /volume1/@appstore/syncthing/bin/syncthing serve --config=/volume1/@appdata/syncthing --data=/volume1/@appdata/syncthing
The 115.1% CPU now are with “export GOMAXPROCS=2” in /volume1/@appdata/syncthing/options.conf Without GOMAXPROCS the DS has a permanent CPU load over 80%
All Folders are in Sync and no Scan is active The abnormal high CPU Usage lasts all the time since then The DS hosts about 360K Files in 33T Directories with 2,3 TiB Data
Any idea?
Regards Claus
---
### Author:  [@asdf8dfafjk](https://forum.syncthing.net/u/asdf8dfafjk)
#### Post date: [October 13, 2026, 10:07am UTC](https://forum.syncthing.net/t/full-cpu-usage-with-syncthing-2-1-6-on-synology-ds-with-dsm-7-4-1/27213/2 "2026-10-13T10:07:09Z")
Consider looking at this? And maybe report back …
---
### Author:  [@calmh](https://forum.syncthing.net/u/calmh)
#### Post date: [October 13, 2026, 12:32pm UTC](https://forum.syncthing.net/t/full-cpu-usage-with-syncthing-2-1-6-on-synology-ds-with-dsm-7-4-1/27213/3 "2026-10-13T12:32:01Z")
Try the 2.1.7-rc
---
### Author:  [@clathi06](https://forum.syncthing.net/u/clathi06)
#### Post date: [October 13, 2026, 12:57pm UTC](https://forum.syncthing.net/t/full-cpu-usage-with-syncthing-2-1-6-on-synology-ds-with-dsm-7-4-1/27213/4 "2026-10-13T12:57:47Z")
> Try the 2.1.7-rc
How? DSM is not normal Linux and Update is only done via SynoCommunity packets.
---
### Author:  [@clathi06](https://forum.syncthing.net/u/clathi06)
#### Post date: [October 13, 2026, 4:11pm UTC](https://forum.syncthing.net/t/full-cpu-usage-with-syncthing-2-1-6-on-synology-ds-with-dsm-7-4-1/27213/5 "2026-10-13T16:11:39Z")
Well, I fetched [https://github.com/syncthing/syncthing/releases/download/v2.1.7-rc.1/syncthing-linux-amd64-v2.1.7-rc.1.tar.gz](https://github.com/syncthing/syncthing/releases/download/v2.1.7-rc.1/syncthing-linux-amd64-v2.1.7-rc.1.tar.gz) to give it a try. First stopped syncthing in DSM Paket Manager.
Then renamed syncthing in /volume1/@appstore/syncthing/bin/ to syncthing.216. Then put syncthing from the Tarball to that directory, changed Ownership and Flags and started syncthing. Now the GUI shows version 2.1.7-rc.1 and after initial scanning CPU load is about 5%. Seems as the new version fixes my problem. I think I’ll wait one day before marking it as solved.
Thx Claus