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Untrusted device never finishes syncing, very high memory usage

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(I filed this as a bug report but got redirected here)

Hello amazing people !

I’ve added an untrusted device (let’s call it U) to my normally working setup and it’s struggling to do the initial synch of all the folders. It got around 80% of the data with no problem, synchronised full folders, but it’s struggling with the last 2 of them. The synchronisation rate dropped to 1 byte per second, syncthing uses around 8-14GiB memory on U now and 2 full CPU cores, but not on any of the other hosts.

    PID       TID    MINFLT    MAJFLT    VSTEXT    VSLIBS     VDATA    VSTACK    LOCKSZ     VSIZE    RSIZE     PSIZE     VGROW     RGROW    SWAPSZ    RUID        EUID         MEM    CMD        1/6
  10984         -     96015     60689    10376K        8K     14.1G      136K        0K     14.7G     6.7G        0K        0K     -0.1G      6.0G    syncthin    syncthin     88%    syncthing

This is an excerpt from the logs on U:

Jul 31 23:23:14 brix syncthing[8247]: [] 23:23:14 INFO: Puller (folder photos, item "8.syncthing-enc/DT/L03IHLC16JCGC2LDEHQFOLLD3RVBBO2L64OHKA1MHQ6M4Q1EIMEK5I6TV6OF2Q2VJSV77RBD1UTM0TKLKA7CMLECU4689"): syncing: pull: generic error
Jul 31 23:23:14 brix syncthing[8247]: [] 23:23:14 INFO: photos: Failed to sync 136 items
Jul 31 23:23:14 brix syncthing[8247]: [] 23:23:14 INFO: Folder photos isn't making sync progress - retrying in 35m51s.

When restarted, the syncthing process on U seems to get better for a while, downloading at around 50KiB/s (normally it would be ~30MiB/s for that machine) but then deteriorates again quite quickly.

I’m on Linux (all devices that sync together, except one which is Android). U is an NixOS server, U and most of the other devices are running Syncthing 1.18.0.

22 posts - 4 participants

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