this is apparently also a problem in Bionic-Beaver. I started a file copy 7,633 files to a new USB stick (SSD to USB 3.1). The copy started out like I expected, at a displayed rate of about 345MB/s. By the time, it reached roughly 1/2 the copy began to slow and before long, it was down to about 34MB/s.
This is after recovering from a very similar issue Friday (last). Where in, it slowed even further, down to 1.2MB/s. I did the research over the weekend, and found reports, very similar to this one, attributing the issues to the Nautilus FS. I also found that Ubuntu 18.04 chose to not update Nautilus, but rather stayed with a previous version. lsb_release -a gives No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04 LTS Release: 18.04 Codename: bionic Machine info: Memory 3.13GeForce GTX 1070 with Max-Q Design/PCIe/SSE2 GiB Processor: Intel® Core™ i7-7700HQ CPU @ 2.80GHz × 8 Graphics: GeForce GTX 1070 with Max-Q Design/PCIe/SSE2 GNOME: 3.28.1 OS type: 64-bit Disk : 97.9 GB (500 GB SSD partitioned into 100 for OS, 400 for local storage) cat /proc/vmstat | egrep "dirty|writeback" yields: (about 2 min after slow transfer finished) nr_dirty 48 nr_writeback 0 nr_writeback_temp 0 nr_dirty_threshold 1502867 nr_dirty_background_threshold 750516 On Friday, I did try to use the command line "cp" on a smaller subset of the file set, with no visual, I cannot say xfer rate, however, it took quite a while (over 5 minutes) to transfer approximately 1500 2MB files. Not sure if there is anything more that I can provide. Oh,a colleague with whom I was sharing these files, was able to upload them (after my laborious download) onto his ubuntu 18.04 in like 20 seconds or so. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1728053 Title: Copy to USB is very slow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1728053/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
