Fedora :: Everything Hangs On Heavy Network I/O?

Oct 24, 2010

After first installing Fedora on my computer, I was having a problem with my programs hanging for about 10-20 seconds, and then starting working again. After a while I discovered that every time it happened, there where some disk activity, and when the disk activity stopped, the programs started working again. The problem also occurred, when I was copying large files. Then the programs would hang until the copy was finished.After some googling around I tried to change the scheduler for SDA from cfq ro deadline, which seemed to solve the problem.

However the problem still seems to occur, if I do something that requires heavy network activity. If I copy a large file from one computer to another or download something using Vuze, all programs becomes unusable until network activity stops again. have 2 computers, which both seems to have the same problem (AMD X2 3800+ and Intel Core I5 750). They are running Fedora 12 and 13 both 64 bit. Both are using Asus motherboards with onboard LAN

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Ubuntu :: Shutting Off Under Heavy Network Use?

Jun 5, 2011

so I've scoured the web and I can't seem to find anyone else having this issue. The issue:

Whenever my box is heavily using the internet, it seems to just wimp out. It shuts off and reboots.

When it's happened:I first deduced the connection to the network connection when I was trying to set up the system. When I tried an upgrade after the first time I installed the system, it crashed, leaving me with broken packages and all kinds of mess. So I decided to start over, and since I then had the network set up, I used the install latest version feature in the installer. If failed again. I battled issue this a couple of times before I opted to do updates in chunks instead of all at once. Success. Then I tried to download an entire website. You see, I had bought the computer to use as a test server for work. I ran wget, I believe. After a lot of recursive downloading, it decided to take another unauthorized break.

Now, I've got a minecraft server running too. It's been working pretty nicely, until lately. I've got a cron job set up to backup the server files with dropbox. Bad, bad, bad. The computer started acting up again, shutting off and rebooting. I figured it was having a hard time uploading to dropbox while simultaneously serving up the game. I moved the cron job from hourly to daily, and haven't had issues all day. Great. Until late tonight. It did it again while we were playing. It's relentless. So I went through the whole process of assessing damage. Luckily no damage. Then I went ahead and ran the dropbox script that didn't get to run while I was performing diagnostics.


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Ubuntu :: Network Manager Stops Working Under Heavy Load?

Jan 19, 2011

this is with both network manager and WICD, a problem i've had since i got ubuntu - multiple wipes and reinstalls the wifi is supported out of the box, the problem i've randomly run into since installing is, it will randomly stop detecting networks "no networks detected"

i've noticed over time as this as been happening, that it usually happens whenever there is a high load - multiple videos going on multiple tabs, videos queued up etc. its never happened during regular browsing - theres always a lot going on when it happens, almost like it collapses. the only way to fix this, is to quit the manager - shut off the computer (restarting doesnt work) and then it comes back after

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General :: Network Stop Working After Heavy Load Of Packets Received

Aug 6, 2011

My LAN has 2 PCs installed, Ubuntu 10.04 and Windows XP. I run the server on Ubuntu, and client on Windows XP. Because I am doing stress test, so the client will keep sending tons of packets to server.

The strange thing is: After few seconds, the client program crash because of insufficient network buffer, the server is still ok. But after that I cant connect Ubuntu PC anymore until I restart it. And I check the router, the led for the Ubuntu PC is always ON (not blinking), look like it is jam already.

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Fedora :: PulseAudio Update - Heavy CPU Usage

Jan 29, 2010

I have Seamonkey set to play a .wav file when mail arrives. Since the latest update to pulseaudio, whenever mail arrives part of the sound plays, then one of my processor cores goes to 100% running pulseaudio. When I kill that process, the system returns to normal. This happens every time a sound is played.

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Fedora :: Heavy Software Raid I/o Causes System Lockup

May 9, 2011

Here is the scenario: I load hundreds of h264/ac3 video clips from my HD video camera onto a four disk software raid stripe under Fedora 14 running the kernel. I then run a python script I've written to do batch process transcoding on the clips so that I can then edit them in cinelerra. FWIW, the transcode command is: nice ffmpeg -i infile.MTS -y -deinterlace -s hd720 -r 29.97 -acodec pcm_s16be -ar 48000 -ac 2 -vcodec mjpeg -qscale 2 out.mov. The python script batches these commands until they are all completed.

The system is capable of 16 concurrent threads and I set up 8 concurrent run queues to do the processing. Occasionally (about one in every 7 runs), the system will hard lockup during the batch. The X screens are still visible, but the mouse and keyboard are dead and the onscreen clocks freeze. The network io led still flashes but the hard disk io led is on solid at that point, leading me to theorize a kernel bug in the software raid handling. I am not able to remote log in and the system must be then hard rest with the reset button. After the reset there is no useful information in the system logs. this is a pretty uber SMP machine: two westmere quad core cpus, 24GB of ram and a four WD disk software stripe array running under the Intel ICH10 controller. I also have a RocketRaid controller installed but no disks are currently attached to it, and I disabled its bios in the setup. Additional disks under the ICH10 are an SSD system disk, and a sata insertion caddy that I usually have occupied with a disk I do backups to. So, all 6 channels on the ICH are usuallt occupied. General output from hdparm -i is:


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Fedora :: Can't Use Openoffice Or Any Other "heavy" Software Because Cpu Is Always 100% Busy

Sep 21, 2009

After the last update (yesterday night) I'm experiencing this problem[URL]..Now, I've also something similar[URL].. I can't use openoffice or any other "heavy" software because my cpu is always 100% busy

but I can't understand which is the process eating so much cpu: the gnome system-monitor show CPU at 100%, but in the tab "processes" no process at more than 1%; ps aux shows crond at 41% and the same system-monitor at 12.4.

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Debian :: Network - Run Apt-get Update And It Hangs

Feb 17, 2010

i got an asdl-modem and a router behind that. before that i just had the asdl-modem and connected with pppoeconf. i start the OS and run apt-get update. all is fine. i open iceweasel and it takes very long till a site is loaded. now and then it can't find the site at all. i rerun apt-get update and it hangs.


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OpenSUSE :: Mc Hangs Temporarily When Network Is Down?

Mar 3, 2011

Midnight Commander startup is usually instantaneous, but when the network (eth0) is down, mct takes over a minute to start.This is a known problem. See:#40 (savannah: MC doesn't open if network gateway inaccessible.) (07 Jan 2007)for example. The problem seems to be caused by mc's use of samba. Is there a known solution or circumvention? The above file advises me to "comment out the eth0 interface from the smb.conf "; however, my /etc/samba/smb.conf seems to have no eth0 interface.The "man mc" file mentions that "smbfs" is one of the virtual file systems used internally by mc. I tried reducing the "vfs" timeout in the ".mc/ini" file from 60 to 5, but this had no effect on the startup time.

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OpenSUSE Network :: 11.3 And Openvpn Connection Hangs

Aug 6, 2010

I have freshly installed OpenSUSE 11.3 64 bit and reimported my old openvpn connections via Network Manager. Connection can be established fine, but after 3 to 6 seconds (pings) it will stop to receive any packets on the tun device.

I tried disabling the firewall, starting openvpn manually, no avail. I checked the message log and the openvpn output, no messages recorded.

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OpenSUSE Network :: KDE Hangs When Peer On Nfs Is Offline?

May 27, 2011

I have a couple of nfs shares which I configured through the yast NFS client module. It entered these in my fstab file to start on bootup. A sample entry is: 0 0

As long as the foreign computer is online all is well. If the foreign computer is taken off line, soon after KDE applications such as Dolphin and the panel freeze, even if I am not using the shares. When the foreign computer comes online again, everything unfreezes on my computer and works fine. Likewise, if the other computer is not online when I boot, there is a long delay while the system waits for the share to come up. Is there something in my configuration that I can change to stop either or both of these problems? I am running 11.4 x86_64 on a wired network with static ip addresses.

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General :: Bridging Network Interfaces Hangs On Getting IP

Aug 14, 2011

I have two physical NICs (eth2 & eth3) with eth2 connecting to the home router/dhcp server and eth3 connecting to another machine which needs access to the internet. I'm trying to create a bridge so that the second machine on eth3 can be connected on the lan. I've tried the following, however it hangs when attempting to get an IP address from the router. Likewise, attempting to give it a static route doesn't seem to work either.

$ sudo aptitude install bridge-utils
$ sudo ifconfig eth2 down
$ sudo ifconfig eth3 down
$ sudo brctl addbr br0
$ sudo brctl addif br0 eth2 eth3
$ sudo dhclient br0 # this hangs and fails to get a dhcp address

I've tried to ensure my routing table mimics what it looks like when using eth2 normally, I cannot hit the gateway at all.

$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface U 2 0 0 br0 UG 0 0 0 br0

I attempted an 'arping' to the MAC address of the router while I had eth2/3 bridged, but it failed to obtain it's IP address as well. One interesting thing I noticed was that attempting to bring down the bridge & reactivate my internet on eth2, I was having trouble pinging the gateway. It turned out 'ipmasq' had been installed and was running causing odd problems. When I stopped the ipmasq service, my internet started working properly again. I removed the 'ipmasq' package entirely and tried bridging the NICs again thinking it may have been causing problems, but it still failed.

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Ubuntu :: Heavy HDD Activity After Login?

Oct 31, 2010

I'm running Ubuntu 10.10 on an Acer Aspire 5530G. On a fresh install, the HDD is silent after logging in and the desktop is immediately ready for use. A few days and updates later, after every login, there's heavy HDD activity that lasts about 20/30 seconds and makes it almost impossible to perform any other task. The entire desktop is visible during said event.

Not a big issue, however it bothers me a little. I've observed this behavior since Ubuntu 9.10. Anyone else experiencing similar problem?

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Ubuntu :: Why Are Mac Programs Always Really Large And Heavy

May 26, 2011

It always seems to me that Mac programs use far more resources compared to gnu/linux and windows. for example the mac version of Firefox is 27MBs while the windows version is only 12. Also system requirements for programs often require far more ram for mac than they do for linux of windows. Is this just because they are poorly written? obviously, the mac version of firefox is just as good as the windows version. but if it's heavier, and does the same stuff, then it's worse, right? This probably has something to do with stupid formatting stuff.

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OpenSUSE Network :: SSH Client Hangs After Typing Password

Jan 5, 2011

After connecting to any host, the openssh client hangs after I type the password. The strange part is, it only hangs if when I use the wlan card. If I connect my phone to the computer and uses it to connect to my server, it works 100%.

If I use any other computer at the wireless network, it works 100%
If I use putty on the same machine, it works 100%

It is only a problem when I use the build-in wireless card, under openSuSE 11.3, on my Lenovo L512. (note that everything besides ssh works completely).

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Ubuntu / Apple :: Network Hangs In Karmic On MBP 5.1 / Sort It?

Feb 10, 2010

When I browse the web and download files, the wireless network connection now and then seem to take a pause of several seconds before recovering. Is this a know issue? Doesn't seem to affect Piding, only my browser and my apt-get upgrades.

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Debian :: System Remains Sluggish After Heavy CPU Use

Jun 11, 2011

I have a problem with my Debian squeeze system. After I have run some CPU-intensive application for a while the system becomes sluggish. Ok, maybe one would expect that. But. The system remains sluggish even after that process has been killed and then top shows high cpu usage from unrelated processes and a high %sy percentage as well. I don't really know where to begin solving this problem except I've checked that this is specifically related to (at least) CPU use as opposed to heavy memory use or IO (by running an application with low mem/no io but high cpu use). I am running the latest standard kernel from squeeze, 2.6.32-5-686. Also, thing is, I remember having similar problems with other Linux distros before, where for example gzipping a large file would cause the same. I did not have similar problems on {Net,Open}BSD, so a hardware fault seems an unlikely reason to me.

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OpenSUSE :: Digikam & Xorg Heavy Cpu Load?

Oct 24, 2010

i run right now digikam and rebuild my thumbnails. It seems like that this task takes a lot of cpu power and its not digikam itself, rather xorg takes the load. Is this right? I just wonder.


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General :: Big Cpu Usage But Top Shows No Heavy Use Process

May 6, 2011

I have been running to a strange problem. For a few days, a few times a day something seems to take over my machine. Suddenly I can't type, or the key shows up about 5 seconds are being pressed, music players halt, etc. In anticipation, I had top and htop running. Sure enough, when this business begins htop reports all 8 cores firing at near 100% for a few minutes. However, top is telling me nothing about who is too blame. The cup%sy on top shows heavy usage, but the top processes are nothing remarkable, mostly just top and htop and conky, all running at around 1 or 2% on average. I am a bit puzzled as to why I can't see the cpu hog so that I figure out what is going on. My question then: Are there some processes (in kernel space?) that don't show up in top, yet which could be hogging the cpu?

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General :: Diagnosing Heavy Cpu System Usage?

Jul 26, 2011

I have been encountering lots of heavy system cpu usage. It is sporadic, last for about 10 minutes, and brings everything else to crawl (latency of even typing characters into an editor or a terminal is painfully slow). My computer is an i7 quad, and all 8 logical cores fire at near 100% during these periods. I can see the usage clearly with htop. The red bars in htop indicate system use (I have attached a screen shot for an example). However, as there is no process per se, I have no clue what is causing it.

It is something I have to fix as the computer becomes unusable periodically throughout the day.I One thing to add, I am using the computer as a ltsp server on ubuntu, attaching to it using two thin clients. There is always heavy ethernet traffic through the second ethernet card. I don't know if this is related. However, I do think all this problem began when I installed the ltsp and switched to using a thin client.

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Slackware :: Heavy Instability On X86_64 Current?

Sep 29, 2010

I have a very frustrating stability problem on my Workstation where I run a Slackware64 Current installation. The problem is, many programs just crashes, after they started, or after a quit short while. Affected are Firefox, Thunderbird, Krusader, Amarok, Konsole, and many other programs. The second problem is, if I downloaded a bzip2 archive, it is corrupt. I downloaded many archives, from other mirrors, and all corrupt. I had installed, the Multilib-packages, thought they would be the reason for the problems, and installed the standard packages of glibc and gcc. No changes. Then I upgraded the kernel from, to (Compiled it myself) Nothing better.


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OpenSUSE :: Pop-up For Network Manager Hangs / Will Not Go Away Covering Part Of Screen

Jul 20, 2010

I am having an issue that the pop-up for Network Manager hangs and will not go away covering part of my screen. This started after the system locked-up. If I try to edit the pop-up setting in gnome it the dialog box lockup and has to be forced shutdown.I am runnning openSUSE 11.3.

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OpenSUSE Network :: Unmount Of CIFS Hangs Or Restart Or Shutdown

Dec 30, 2009

I have a SMB share being mounted during boot using a /etc/fstab entry.All that seems to work fine, but on shutdown or reboot I found that the system hangs for a variable period trying to unmount the share. It appears from the log that the unmount is happening after the network connections are closed.Is there someway around this, or is there some other way I should be mounting the share so that it is closes successfully at restart or shutdown?

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OpenSUSE Network :: 11.3 NFS Client Hangs On Large File Transfer?

Jan 2, 2011

When accessing an NFS mount for a large (200MB+) file transfer, the transfer starts rapidly, then becomes slower and slower until it hangs. On several occasions, it has frozen the client machine. Both client and server are set to default to nfs version 3. Slowdown and hang also occur when connecting to FreeBSD NFS mounts.

Presumably (I hope), there is some sort of configuration for the client that needs to be set. what should be changed in the configuration? This worked out of the box in OpenSUSE 11.0.

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OpenSUSE Network :: 11.4 (Module E1000e And VLAN) - System Hangs

Mar 16, 2011

The module e1000e is loaded into system. At addition VLAN the system hangs at a stop VLAN or configure other devices (sound, video). In OpenSuSe 11.3 it worked correctly.
MB: ASUS P5Q-ME DO / NetCard: Intel 82567LM-3

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Ubuntu Networking :: Wireless Network Drivers Hangs When Open It?

Apr 5, 2011

Using Ubuntu 11 64 bit. I tried to install a netgear driver, it didn't work so I deleted it, now every time I try to run Wireless Network Drivers the program hangs and I can't do anything with it. I have to force quit. I have removed and installed it a few times now to no avail.

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Debian Configuration :: Wheezy32 Boot Hangs - Configuring Network Interfaces

Jan 6, 2016

As above, my wheezy 32bit hangs at boot. the last few lines displayed are

Code: Select allMounting local filesystems...done.
Activating swapfile swap...done.
Cleaning up temporary files...
Setting kernel variables ...done.
Setting up resolvconf...done.
Configuring network interfaces...

[Code] ....

I removed the files from /etc/network/interfaces.d/ just in case. i still can't boot up.

Resolved (I think) as on this post: [URL] ....

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OpenSUSE Network :: Integrate Amavisd Milter Mail Delivery Hangs At 63%

Mar 31, 2011

I am trying to built a mailserver using Sendmail + cyrus + amavisd + TLS authentication. All programs used are the latest versions shipped with OpenSUSE 11.4 I have set-up successfully sendmail+cyrus and I can send e-mail anywhere without a problem using authentication. But when I try to integrate amavisd-milter mail delivery hangs at 63% and the following message appears in /var/log/mail


I have also uninstall all involved programs, deleted all conf files and re-installed them but alas without any success. The same configuration was used at least once with almost all previous SuSE/openSUSE versions since 1998.

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Ubuntu :: Why Is Desktop So Heavy - Ram Load From 275mb To 120mb

Mar 13, 2010

I installed openbox and pcman on my old desktop and was able take the desktop ram load from 275mb to 120mb. (openbox, pcman, kupfer, gnome-panel) I was so pleased with the increased headroom and performance that I wanted to do it on my macbook. Usually my macbook has as desktop ram load of about 350mb... which I find excessive as that is heavier than OS X. That's running gnome, nautilus, compiz, and gnome-do at startup.

I performed a similar procedure today to create the same setup on my laptop and... strangely, my ram usage on the desktop is still close to 300mb! I've brought up system monitor and added up the ram of all the processes it detected myself and it only added up to about 50mb. How is it that my desktop is still so heavy in a minimal environment?? (both machines are Karmic 9.10, by the way. The desktop is hardwired to the internet while my laptop uses Wicd)

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Ubuntu :: Browser Handle Heavy Java Usage ?

Jul 21, 2010

I'm looking for a browser than can handle heavy java usage. Firefox doesn't seem to be able to handle heavy usage anymore . Chromium does a decent job, but its just so different from Firefox I just can't get used to it. I have been trying to get used to chromium for over 2 weeks but can't because of the huge difference. So what other browsers can handle heavy java usage? On windows kmeleon was my go to browser to give you an idea of the browsers that I like.

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