search for: iotop

Hi! i have a problem with iotop : root at alien: ~ # iotop Traceback (most recent call last): File "/usr/bin/iotop", line 16, in ? main() File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 567, in main main_loop() File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 557, in...

Is there something like iotop in rpm form available for Centos 4.x? Matt

Hi Everyone, My Xen host has 2 X 1TB hard drives in a RAID1 setup. If one DomU starts to dd a 5GB file (A ran it in a loop as a test), access ssh on the other DomU becomes very slow. Is this normal? Many Thanks _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

...o 100 megs/sec). With iostat, I find that it's almost a write i/o problem. How can I find to which files the OS writes ? On OSX boxes, there is a utility called fs_usage that can reports any disk activity for a particular process or all processes. Is there any utility like this on Centos ? iotop can points me to wich process, but that doesn't points me to what files are the culprits...

OK.? That is interesting.? I am assuming tps is transfers per sec? I would have to get a stop watch, but it seems to go a bit of time, and then a write. Is there something that would accumulate this and give me a summary over some period of time?? Of course it better NOT be doing its own IOs... On 11/10/19 6:03 PM, shimi wrote: > iostat 1 > > On Mon, 11 Nov 2019, 00:11 Robert

...lt;at> gentoo.org> writes: >> [...] >> >> Every few minutes, (I guess) when applications do fsync (firefox, >> xchat, vim, etc), all applications that use fsync() hang for several >> seconds, and applications that use general IO suffer extreme >> slowdowns. iotop shows various combinations of the processes listed >> below doing writes, and the total write as 2-3MB/s. >> >> [btrfs-dealloc-] >> [btrfs-submit-0] >> [btrfs-transacti] >> [btrfs-endio-wri] >> [flush-btrfs-1] > > I''m using btrfs under a 2.6...

...py_4.png Not saying there are no issues with Windows, but the problems seems to be very repeatable in my home setup. Removing "vfs modules = io_uring" makes everything 100% OK in all tests. A note regarding threading. I do not know how Windows is requesting the files, but looking in iotop, it seems at least several smb threads are used serving the requests: This is "iotop -o" when copying from the no_io_uuing share: https://paste.tnonline.net/files/G1impe8EHhUU_no_io_uring_copy.png ###### NO IO_URING ###### # iotop -o Total DISK READ :????? 86.32 M/s | Total DISK WRITE...

On Thu, Apr 30, 2020 at 10:25:49AM +0200, A L wrote: > So I did some more tests. smbclient mget does not copy in the same way > Windows Explorer does. When copying in Windows Explorer, there are many > multiple concurrent threads used to transfer the files. With smbclient mget > there are no corruptions, both locally and over the network from another > Linux machine. > > I

Hello, I am running a mail benchmark test using smtp-source[1] with VM running postfix on Xen hypervisor. My system configuration is: uname -a -> Linux cadlab 3.1.10-1.19-xen #1 SMP Mon Feb 25 10:32:50 UTC 2013 (f0b13a3) x86_64 x86_64 x86_64 GNU/Linux I am observing a very high disk write usage by xenstored (some 5 Mbps) without even anything running on the VM. Is it normal? During test, I

Hello, I am running a mail benchmark test using smtp-source[1] with VM running postfix on Xen hypervisor. My system configuration is: uname -a -> Linux cadlab 3.1.10-1.19-xen #1 SMP Mon Feb 25 10:32:50 UTC 2013 (f0b13a3) x86_64 x86_64 x86_64 GNU/Linux I am observing a very high disk write usage by xenstored (some 5 Mbps) without even anything running on the VM. Is it normal? During test, I

...(--bwlimit), nor can the "trickle" command be used with it in order to limit IP bandwidth usage; trickle simply has no effect. Reportedly this is because the Go language (the "golang" package in Debian-land) uses system calls directly rather than via libc. :( (3) Same goes for iotop. Iotop has no effect at launch time, and it can't re-iotop (reclassify the i/o priorities of) already-running diskrsync processes, either. :( (4) The "nice" command doesn't work at diskrsync launch time to control CPU usage, but renice works on an already-running diskrsync proces...

...reate a thinly provisioned logical volume: pvcreate /dev/nvme0n1 vgcreate vgg /dev/nvme0n1 lvcreate -l100%FREE -T vgg/thinpool lvcreate -V40000M -T vgg/thinpool -n brick1 mkfs.xfs /dev/vgg/brick1 If I run a write test ( dd if=/dev/zero of=./zero.img bs=4k count=100000 oflag=dsync ) I see in iotop that the actual disk write is 30 times the amount of data that I'm actually writing to disk). Total DISK READ: 0.00 B/s | Total DISK WRITE: 1001.23 M/s TIME TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND 10:59:53 34453 be/4 root 0.00 B/s 30.34 M/s 0.00 % 12....

...as: /dev/md0 /mnt/raid1 ext4 defaults 0 0 Under CentOS 7 the /dev/md0 mirror was silent when not in use. Now under 8, the hard drives are constantly "pinged" by some process, at about the same frequency as a heartbeat monitor. I can not figure out what process is keeping them active. iotop does show a process named [ext4lazyinput]. Is there something I've missed?

...> Is there something that would accumulate this and give me a summary over > some period of time?? Of course it better NOT be doing its own IOs... I like iostat -x 4 which will give a summary every four seconds of accumulated stats, but check the man page for all the options you can use. iotop (yum install iotop) may also be helpful as it shows disk usage per process like top does for CPU and memory. Peter

Hello, I''m a newby to dtrace and have just installed the dtrace toolkit v0.92 on a core soalris 10 1/06 installation on SUN v40z. I have tried the following commands: iotop iosnoop but I get the message dtrace: invalid probe specifier and a lot of code. At the end it says: : in action list: failed to resolve uid: Unknown variable name Could it be, that there are some things missing in the core installation? thanks for every reply Peter

hi, i use libvirt 1.0.2 (-r1 , gentoo linux). when i create a vm with win7 guest, virtio nic, virtio hdd, all is running fine. but when i shutdown the windows guest, it takes somestimes 20-34 minutes !!! iotop shows me in the whole time writing with 2,xxmb/sec. is the complete machine "rewritten" to disk? i use disk.images on a raid6, but hey, dd shows me it can writes there with 26mb/sec. any ideas what causes these long shutdown times? thanks for any hints, marko

...took 465 minutes... BackupPC uses hard links for unchanged files between backups, if that''s relevant. When copying a large file over gigabit, I''m getting around 50MB/s burst speed for about 30s, followed by a minute of 0B/s when btrfs-submit and btrfs-transaction are at 99% IO in iotop but minimal READ/WRITE. Is there anything I can do to relieve that? If more details can help, I''ll gladly provide them. [1] http://pastebin.ubuntu.com/5755800/ Thanks, -- Michał (Saviq) Sawicz <michal@sawicz.net>

Hi, I'm running dovecot 2.2.x and I'm having an issue where I see many dovecot processes use all the available IO on a server. According to iotop the worst offenders seem to be in this state (NOTE: I swapped in phony username & IP info): dovecot/imap [someusername 123.456.789.012 UID SEARCH] The server in question is running with Maildirs on top of an XFS filesystem. Is there anything I can do to optimize "UID SEARCH" or find...

Hi Users I am using RHEL 6.5 on my server. From top command i can see that the processors in my server are spending a lot of time on wait for I/O. I can see high percentage in terms of 30-50% on "wa" time. Here is the df output about the disk space in my system: ********** [root at localhost images]# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1

...; Loaded plugins: fastestmirror {'arch': 'ia32e', 'basearch': 'x86_64', 'releasever': '6', 'uuid': 'd42ce92e-d28b-4637-8365-2cf02892ee58'} But yum exits with error: # yum --disablerepo='*' --enablerepo='epel' search iotop Loaded plugins: fastestmirror, security Loading mirror speeds from cached hostfile Error: Cannot find a valid baseurl for repo: epel I've tried to open http://mirrors.fedoraproject.org/mirrorlist?repo=epel-6&arch=x86_64 but got # Bad Request 2960 # {'repo': u'epel-6', '...