Can't believe this bug dates all the way back from 2014 and 8 years later in 2022 this is still a thing! Not only that the bug has nobody assigned to it and is of "undecided" importance!
My experience is appalling even by juggling with the vm.dirty_ratio and other dirty bytes values and my system is nothing to sneeze at (2 x 7763 Epycs, 2TB RAM etc). Trying to copy 16TB of data, that consists of big files (tens and even hundreds of GB of files), to a USB 3.0 RAID0 drive, would start initially at ~300MB/s copy speeds (cp, rsync...doesn't matter) and fall quickly to like 10% of that value of 30MB/s as dirty bytes values soar as soon as copy begins. Bumping the drity ratio to even 99, meaning filling up the RAM with the dirty values, doesn't help much either as it only block the whole RAM but also allows for only a few files to be copied at full speed, the throttle still being applied as soon as the threshold is reached. To get back at full copy speeds, one needs to either wait for dirty values to go down (ages) or find a way to clear the RAM cache (hard reboot would do it but it's unacceptable). This BUG is simply incredible and prof that Linux and the kernel more precisely has yet to mature itself even after 30+ years -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1208993 Title: Ubuntu slows down and hangs while copying file from/to USB Status in linux package in Ubuntu: Confirmed Bug description: Hi While copying many and large files to and from a USB drive, the system becomes incredibly slow and sometimes hangs. I watched the system monitor while it was running slowly but cpu was not above 50% at any time, the same for memory. I'm using the "WD my passport" HD with a USB3 port of my "ASUS K55VD" laptop. Description: Ubuntu 13.04 Release: 13.04 nautilus: Installed: 1:3.6.3-0ubuntu16 Candidate: 1:3.6.3-0ubuntu16 Version table: *** 1:3.6.3-0ubuntu16 0 500 http://ubuntu-archive.mirror.nucleus.be/ raring/main amd64 Packages 100 /var/lib/dpkg/status Steps to reproduce: 1) Aquire many large files (like your totally legit moviecollection) 2) Copy files to external HD 3) Open your browser and be sad when your system becomes incredibly slow after a few minutes This is my first bugreport so if I'm missing something, please tell me. ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: nautilus 1:3.6.3-0ubuntu16 ProcVersionSignature: Ubuntu 3.8.0-27.40-generic 3.8.13.4 Uname: Linux 3.8.0-27-generic x86_64 ApportVersion: 2.9.2-0ubuntu8.1 Architecture: amd64 Date: Tue Aug 6 22:56:34 2013 EcryptfsInUse: Yes ExecutablePath: /usr/bin/nautilus GsettingsChanges: b'org.gnome.nautilus.window-state' b'geometry' b"'656x715+154+151'" b'org.gnome.nautilus.window-state' b'maximized' b'true' InstallationDate: Installed on 2013-05-31 (67 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MarkForUpload: True SourcePackage: nautilus UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1208993/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
