Syncing 25k small files - need faster solution

bb77 · October 22, 2025, 7:36am

Indeed, it was set that way for me, too. I wouldn’t have noticed if you hadn’t posted about it. Thanks!

I did a little digging and found the following thread:

Related Bug Reports:

github.com/nextcloud/desktop

[Bug]: "Automated Bandwidth" network settings leading to slow sync

offen 09:30AM - 15 Sep 25 UTC

Ornanovitch

1. to develop bug Prio: high confirmed

### ⚠️ Before submitting, please verify the following: ⚠️ - [x] This is a **bug…**, not a question or a configuration issue. - [x] This issue is **not** already reported on Github (I've searched it). - [x] Nextcloud Server and Desktop Client are **up to date**. See [Server Maintenance and Release Schedule](https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule) and [Desktop Releases](https://nextcloud.com/install/#install-clients) for supported versions. - [x] I agree to follow Nextcloud's [Code of Conduct](https://nextcloud.com/contribute/code-of-conduct/) ### Bug description Since 3.17 upgrade, the sync is extremely slow. ### Steps to reproduce 1. Upgrade from 3.16.6 to 3.17 2. Sync a folder ### Expected behavior No sync regression ### Which files are affected by this bug all files, even small ones ### Operating system Linux ### Which version of the operating system you are running. Arch ### Package Distro package manager ### Nextcloud Server version 31.0.9 ### Nextcloud Desktop Client version 3.17.1 ### Is this bug present after an update or on a fresh install? Updated to a major version (ex. 3.16.3 to 3.17.0) ### Are you using the Nextcloud Server Encryption module? Encryption is Disabled ### Are you using an external user-backend? - [ ] Default internal user-backend - [ ] LDAP/ Active Directory - [ ] SSO - SAML - [x] Other ### Nextcloud Server logs ```shell none ``` ### Additional info _No response_

github.com/nextcloud/desktop

[Bug]: Very slow per file action since 3.17.0 on Windows 11

opened 10:13AM - 18 Sep 25 UTC

closed 10:39AM - 27 Sep 25 UTC

sniegockiszymon

bug

### ⚠️ Before submitting, please verify the following: ⚠️ - [x] This is a **bug…**, not a question or a configuration issue. - [x] This issue is **not** already reported on Github (I've searched it). - [x] Nextcloud Server and Desktop Client are **up to date**. See [Server Maintenance and Release Schedule](https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule) and [Desktop Releases](https://nextcloud.com/install/#install-clients) for supported versions. - [x] I agree to follow Nextcloud's [Code of Conduct](https://nextcloud.com/contribute/code-of-conduct/) ### Bug description When downloading or uploading a single large file, everything works fine and the speed is normal. However, when transferring multiple smaller files, it creates one file every few seconds, regardless of the file size. I can see in logs every one of them. I’ve updated to 3.17.2 and still have the same issue. I have to use 3.16.6. I’ve checked on two different servers, (They are on different networks, and hardware, locally or internet, it doesn’t matter.) The only thing in common is that both servers are running as Docker containers on TrueNAS. Every file takes a few seconds to start syncing, even if its few KBs. ### Steps to reproduce Just syncing anything ### Expected behavior Normal speed, like it used to be before 3.17.0 client. ### Which files are affected by this bug Its not particular file ### Operating system Other (e.g. FreeBSD) ### Which version of the operating system you are running. TrueNAS-24.10.2.2 ### Package Other ### Nextcloud Server version 31.0.8 ### Nextcloud Desktop Client version 3.17.0 and above ### Is this bug present after an update or on a fresh install? Updated to a major version (ex. 3.16.3 to 3.17.0) ### Are you using the Nextcloud Server Encryption module? Encryption is Enabled ### Are you using an external user-backend? - [ ] Default internal user-backend - [ ] LDAP/ Active Directory - [ ] SSO - SAML - [ ] Other ### Nextcloud Server logs ```shell ``` ### Additional info _No response_

github.com/nextcloud/desktop

Sync upload hangs randomly when "auto" limit is set (okay if set to "no limit" or a specific limit)

offen 09:15AM - 29 Oct 23 UTC

geschlossen 03:31AM - 05 Sep 25 UTC

ferdiga

0. Needs triage bug feature:

sync engine

### ⚠️ Before submitting, please verify the following: ⚠️ - [X] This is a **bug…**, not a question or a configuration issue. - [X] This issue is **not** already reported on Github (I've searched it). - [X] Nextcloud Server and Desktop Client are **up to date**. See [Server Maintenance and Release Schedule](https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule) and [Desktop Releases](https://nextcloud.com/install/#install-clients) for supported versions. - [X] I agree to follow Nextcloud's [Code of Conduct](https://nextcloud.com/contribute/code-of-conduct/) ### Bug description MacOS 14.0 NC Desktop 3.10.1 NC 27.0.2 Sync stops randomly - nevertheless I could sync very large folders with many GB and many files without problems for a while suddenly stops syncing 5 4MB image files - and uses 100% CPU look at the negative (!) number .... which was frozen. I didn't find any error logs. ![Image 28 10 23 at 18 11](https://github.com/nextcloud/desktop/assets/6248560/14ae901a-beb2-42b8-89dd-120f8ea37629) ### Steps to reproduce 1. After update of MacOS to 14.0 on "old" chip and update of NC Desktop 2. move files to synced directory 3. NC Desktop stalls sometimes with 100% CPU I tried the last 3 releases of NC Desktop - same problem I tried to move 1-6 jpeg files to the synced directory, this works sometimes, sometimes not. the sync directory is a group folder ... ### Expected behavior sync should (as before) sync all newly detected files. ... ### Which files are affected by this bug jpeg ### Operating system Mac OS ### Which version of the operating system you are running. 14.0.1 ### Package Appimage ### Nextcloud Server version 27.0.2 ### Nextcloud Desktop Client version 3.10, 3.10.1, 3.9.4 ### Is this bug present after an update or on a fresh install? Updated from a minor version (ex. 3.4.2 to 3.4.4) ### Are you using the Nextcloud Server Encryption module? Encryption is Disabled ### Are you using an external user-backend? - [ ] Default internal user-backend - [ ] LDAP/ Active Directory - [ ] SSO - SAML - [ ] Other ### Nextcloud Server logs ```shell no errors ``` ### Additional info _No response_