I've got a Lenny system on a quad core system with 4GB of ram. Currently Linux www 2.6.26-2-amd64 #1 SMP Thu Nov 25 02:05:44 UTC 2010 x86_64
I've had it for a couple of years, and its been fine, very fast and reliable.
Lately, its got a problem: after its been running for a day or two, access using SSH, or TLS/HTTPS gets really slow. Painfully slow. A reboot returns the system to normal fast operation.
I can't think of anything that has changed, other than I got a new SSL cert and installed it.
The system is mostly a vanity domain server, with Apache HTTPD running a half dozen very low volume services. Its running bind9, mysql, and a few other things, nothing big, nothing that would load down a quad core with lots of ram. The disk is only 14% used.
I'll often run iceweasel for watching videos via flash (hulu, ....., et cetera) while working, in fedora I never noticed any performance problems, watching the video while using chrome for browsing, gedit for editing, et cetera, everything was responsive. Though, now on debian running iceweasel for the same purpose hogs memory and processor time, which slows down the responsiveness of the system as a whole, making it difficult to use other programs.I'm curious how I should go about troubleshooting this issue, and what diagnostics might help me find the solution.
I've got this weird problem: when I reboot my Debian 8.3 server, I have to run through the crypto unlocking processes for my encrypted volumes a few times before I actually get to a login screen. The operation times out 85% of the time, leaving me to reboot and try over and over until the system is happy.
Here's my partitioning setup (manually partitioned at install): /boot: 500 MB, EXT2, nodev, nosuid, noexec /tmp: 2 GB, EXT2, AES-256/xts-plain64 with RANDOM KEY swap: 2.5 GB, AES-256/xts-plain 64 with RANDOM KEY /: 35 GB, EXT4, AES-256/xts-plain 64 with PASSPHRASE /var: 35 GB, EXT4, AES-256/xts-plain 64 with PASSPHRASE /home: 45 GB, EXT4, AES-256/xts-plain 64 with PASSPHRASE
Here's the output from journalctl -b -p 3: Code: Select allDate and time | server name | systemd[1]: Timed out waiting for device dev-sda5.device Date and time | server name | systemd[1]: Dependency failed for Cryptography Setup for sda5_crypt Date and time | server name | systemd[1]: Dependency failed for Encrypted Volumes Date and time | server name | systemd[1]: Dependency failed for dev-mapper-sda5_crypt.device Date and time | server name | systemd[1]: Dependency failed for /tmp
[Code] ....
I had the same problem in previous builds where I chose Twofish instead of AES, and I was hoping that the timeouts would be fixed by switching to AES as my CPU has the AES instruction set. Obviously that didn't make a damn bit of difference.
What am I doing wrong, or what should I change in my setup? The encryption is a requirement. Could the problem be caused by something as stupid as using a RANDOM KEY instead of a PASSPHRASE on /tmp and swap?
I recently bought two DreamPlugs and replaced the preinstalled aged Ubuntu 9.04 with Debian Squeeze on them.I built a Marvell Orion 2.6.35 kernel from git. OpenSSL performes lousy on this hardware (my VIA Nano with PadLock support gives me ~690 000k on 8192 size blocks):
I ran Karmic until last week, and noticed that it seemed to be getting slower. I was hoping a clean install of Lucid would fix that. it's worse. If I leave my machine running for a few hours, something begins dragging down the performance to a crawl.
System Monitor sometimes won't come up - launches an empty grey window. Other times, System Monitor reports that gnome-system-monitor is consuming 86-96% CPU. This is a dual-core Dell e6500 laptop with 4 Gigs of RAM, it should fly. Any ideas on troubleshooting this?
I have a newly installed Dell Optiplex 755 with Ubuntu 10.04 (64-bit) and I am having serious issues with network copying. Whenever I start rsync och scp with larger amounts of data my system becomes practically unresponsive (all types of apps grey out) until those processes are completed. Cpu stays at below 10% and I have lots of free memory and such .
My system slows much down so that i cannot use it at all when am watching any online videos or movies am using firefox 3.6.13 .
My spec is: intel celeron 2.53 Ghz 512 Mb ram ubuntu 10.04 on 40 GB seagate ide harddisk Windows Xp on 80 GB western digital ide harddisk in dual boot.
And also my browser cannot open login page of yahoo site and some time it waits saying waiting for s7.addthis.com, or waiting for ad.yieldmanager.com like some thing when i am trying to open some sites
I noticed that sometimes my Linux server will randomly start to lag really badly, to the point where even a http request takes forever. It is an Intel Core2Quad with 8GB of ram running FC9. This is my "Everything" server so it does file, email, DNS, web (for local stuff only), VMs and so on. There are about 5-6 VMs running on it at any given time. I manage it through a VNC session and have some SSH consoles within that session. This way if I reboot my PC I don't lose all my SSH consoles. If I need to SSH to any server I do it from there. I treat it kinda like a terminal server to some extent.
When this slowdown happens, top is not really useful because I also do F@H so that will always be to the top, but it's low priority. The VMs are also always near the top. This does not change whether it's slow or not, so when it's slow, I have nothing to go by on how to troubleshoot. The load does seem to skyrocket though. Right now it's doing the slowdown thing and it's at 8.09. Normally it's at around 3 which imo is good as it it's under 4. I have 4 cores so anything more than 4 means it's queuing. At least that's how I understand it. This is the output of top:
I find gnome-shell 3.14.2 becomes slugish after several days of use. This manifests in short delays on window functions, such as closing a window or opening a new one. Restarting gnome shell fixes it.I thought of trying to take a stack trace during the delay, but found 2 issues:
1) debian doesn't have gstack/pstack package ...? 2) attaching a debugger to gnome shell from gnome shell hangs it (duh) , which means I can't type the "bt" command
I use Debian Testing with the default Clearlooks theme - (nvidia graphics, 32-bit kernel 2.6.38-2-bigmem) For some time i noticed Nautilus opening folders slowly. I did a gtkperf test and i was surprised that i got 12 or so seconds. Before i had ~3 seconds. Gtkperf test output with the libcairo2 version 1.10.2-6 (notice the high GtkComboBox and GtkToggleButton values):
Why there is too much error in every version of gnome-shell and after everything slows down after a few hours of working in gnome-shell on debian(only on debian, i'm using gnome-shell in fedora and excellent experience i had in it) some of syslog output :
A few months back I performed a routine aptitude upgrade on a Squeeze installation on a DELL Vostro desktop. My eth0 upload speed is now very bad although download speed is good. I suspect that it could be related to my other problem [URL] which was caused by the OS enabling noveau driver instead of the installed NVIDIA proprietary drivers.
On a bunch of servers, we use integrity checking tool on a large amount of data. Therefore, we compute SHA1 hash from a lot of files everyday. The CPU is a "generic" one, enough powerful for normal use, but get's totally saturated when integrity check begins. Is there any kind of server using a crypto-processor so as to delegate crypto functions to this dedicated processor?
How do you find what typs of crypto ciphers are supported.? I've dumped out /proc/crypto, which lists out a bunch of types, but none of the names listed seem to work. So far I have only got a couple types to work, the default(when I don't supply cryptsetup any cipher type) aes-cbc-plain and aes-ecb.
Since I don't even see aes-cbc-plain in /proc/crypto
Having installed 9,10 onto a laptop my cherubic daughter swicthed off the power (no battery) and upon restarting i am faced with "Starting Init crypto disks... OK) and there it stops!! I had hoped that I could go to recovery mode and fix it but am faced with the same stalling point. I see others are unresolved in this.
I hope somebody has a solution to this annoying situation: right after restart my system is very fast (at least for me), but after few days it slows down to the point when using it becomes a waste of time. As soon as I restart everything is OK. Usually I keep open 1-2 Open Office files, couple large PDFs, and some Firefox tabs at the same time, nothing special. No gaming/video on this rig, just basic internet and text processing. Here are my specs:
Using ubuntu 10.10 64 bit, last few days my desktop is not stable. Everytime my system becomes very slowwwwwwwww after login (after 5 mins, after 2 mins very random), sometimes it takes a while even to get to login screen. I checked System Monitor when this happens, i don't see high cpu usage/memory usage. Only thing i see is, when i shutdown my machine, it giving few errors about Virtualbox.
About a week after installing 11.04, I started noticing that my computer basically locks up after leaving it for many hours. When I come back, I cant get any programs to respond. I click on Firefox and it takes about one minute for it to finally respond. If I try to launch Konsole, it locks up too. But suddenly all programs start responding at the same time, after about one minute.
This is very frustrating and I just feel the problem is zeitgeist. Of course I am not sure because I cant even run System Monitor to check the problem since I cant run any apps for about a minute. By the time I run System Monitor everything is working again.
I'm running Ubuntu in a virtualbox on a Windows 7 host. It works great - except after I start up the machine, the response to keystrokes and updating of the screen slows way down. It gets slower and slower until it is unbearable after about an hour. If I save the machine state and reload it, things work great again - so it sounds like a virtualbox problem, not an ubuntu problem. Do other people who run Ubuntu in a virtualbox see this behavior? Do other people who run virtualbox in Windows 7 see this?
I have a Actiontec m1000 modem from Qwest that seems to offer more speed to my brothers Windows PC then my Linux PC (same make and module) I checked the ping on all systems, and they all look fine. The only thing that seems different is the number of open sessions in the modem, Linux only uses 2, and Windows uses 80. My guess is that the modem uses sessions to control the bandwidth, but I don't know how to add sessions to Linux networking to compete for bandwidth. I did test in the same browser.
I'm using OpenVPN to connect to a remote system. When I run
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It brings up a new tunnel interface. The problem is that once the tun interface is brought up and the VPN is established, my whole Internet connection slows to a crawl.
Here is the output from ip route show before openvpn:
I have an old laptop that used to run on Vista. It got so bogged down with excess software etc that it was barely running. There was no sound and it was unbelievably slow.
I know its supposed to be more stable (almost uncrashable!) and generally faster so I've done a complete reinstall with kubuntu (I tried a few different distributions with live discs and this was my favourite). All I need it to do is play DVDs - I have a netbook for everything else but the screen is too small for watching movies.
The reinstall worked perfectly and I love kubuntu. The sound now works fine and its MUCH faster.
Except ...
Half way through watching a DVD the system seems to suddenly slow down. The DVD playback becomes choppy and unwatchable and even when I close the player, the whole OS is painfully slow. Programs take ages to open. Even selecting shut down or restart takes over a minute.
And here's the weird part. A restart doesn't fix it. If I restart the system and try to watch the DVD again its instantly choppy. And the whole OS is slow. I actually have to leave the whole system off for a while (I usually give up for the night!) before it calms down.
The laptop is not noticeably hot. Leaving the machine on for a long while doesn't cause problems. It seems to be only when watching DVDs. The spec is not especially low (1GB ram and a reasonable processor) and it doesn't matter whether I use VLC, Dragon or Movie Player.
I've just added an extra 1GB of RAM memory to my laptop (HP 530). Now I have 2 GB. Everything runs great, except Compiz and 3D games. It looks like anything that's related to the graphics card now slows down. Rotating the cube lags badly, so does the Burn effect, and UrbanTerror is lagging too.
Before the upgrade, I had a Samsung 1GB SO-DIMM, 667 MHz. Then, I bought a Kingston 1GB SO-DIMM, 667 MHz too. When the laptop boots with either of the SO-DIMMs (only ONE GB at a time), everything runs smoothly, like before. But when I put both of them (regardless of the order in the sockets), my video card seems to slow down at nearly half of it's speed.
I haven't tried with Windows yet. Also, my graphics card has a dedicated memory of 256 MB, so there's no memory sharing between video and the RAM.
I just don't get it. Also, there are other people that seem to have slowdowns after upgrading the RAM, but usually the whole system is affected. For me, it's just the video. It actually boots faster with the 2 GB. Yet I found no clear solution to this.
Running Fedora 10 i686, on a 32-bit Intel Core Duo @2200 MHz, video card Intel 945GM Express, with 256 MB of dedicated memory. The swap partition is 2.8 GB in size.
When ever I choose suspend to shutdown the hard drive slows and the picture on the screen freezes. The mouse and kb are disabled and the cpu fan keeps running. My hardware in in my sig below I have turned off automaitic updates straight after installing from disc as the last time I had it switched on after a few updates I got repeated ata drive read errors and the pc would freeze for a while being unable to read from the hdd. I have run wd diagnostics on the drive and it works fine. To fix this problem I did a clean install after messing round for 3 days and achieving nothing. I have an arch partition that works fine as well although I have not attempted to get suspend working with it. ( hal error) I have read a few thread on the net and tried entering the swap disks uuid into grub.
I have a Dell XPS M1530 which has 4GB of RAM and Nvidia graphics card. I have problem with Ubuntu 9.10 (had the same problem with previous version). If I change the desktop wallpaper from System > Preference > Appearance it seems to freeze everything momentarily (15-30 seconds). Then you see the jagged transition happen when wallpaper changes from current to new.
I tried with wallpaper-tray applet and it has the same affect. I have NVIDIA-Linux-x86-100.14.09-pkg1 installed for Nvidia and all the effects enabled. They don't run slow at all...Like when I move the window, the window frame is fluid and flows beautifully. Is there a way I can make the wallpaper issue go away? Or disable the transition effect on wallpaper change?
I upgraded a copy of my previous 9.10 installation so I can still use 9.10.
Network does work with 10.04 but is extremely slow. Website loading is initially quite fast but then slows to a crawl. Second and third tabs appear to stall completely, waiting for the first tab to finish.
I have a problem multitasking in ubuntu. all i want to do is be able to browse the web or play a game while listening to music, currently trying to do this slows or makes music lag.I have a dual core processor and 2 gb of ram, and ubuntu runs lightening fast, even while multitasking everything but the music runs great. i can do this in windows, so i dont see why i cant do it in ubuntu.
i have watched my cpu and ram monitors while doing this and there are plenty of unused resources, i believe neither processor core ever tops 20% while trying to do this, and ram, 7%. I want ubuntu to use the extra resources instead of taking away from my music playback. And what i mean by games are like quadrapassel and simple stuff, im not trying anything difficult. So my question is; Can i make ubuntu use more resources, or never sacrifice music quality?
I have Ubuntu 10.10 running on a Dell Latitude E6500 notebook and am using the Broadcom STA wireless driver (just in passing, same happens on Mint 10).
My problem is this: - when the computer is plugged into a power outlet, wireless works fine, but - when the computer is running on battery, it hardly works at all: The network strength indicator item still shows the same connection strength but data are not transmitted anymore or only extremely slowly (google.com might 2 minutes to load).
The drop in performance literally happens 1 sec after unplugging it, and once the notebook is plugged into external power again, it resumes after a few seconds. (I have tested this with big downloads where you can see Firefox's or the Update Manager's download speeds.) The BIOS doesn't seem to have power saving settings that make that happen, and I haven't found any in Ubuntu.
I am programmatically doing a large FTP upload (about 5 Gb's of 2-3 Mb files) from my Windows 7 machine to a ProFTPd server on my Ubuntu box. When the program is run, transfer rates are huge! but as run time continues, transfer rates drop off significantly and eventually slow to a halt resulting in a:
Quote:
Read Timed Out
error.
The rest of the uploads fail due to Socket Read Errors.
I'm having a weird problem that I'm hoping someone can help me with.
First some specs: F13 NetworkManager Applet 0.8.3.998 Driver r8169 Opera 11 and Firefox 3.6.16
Recently my ISP switched to PPPoEand since then my internet connection has been giving me problems. While browsing, some websites load fine, some websites load fine after I refresh once or twice, some load really slowly and the formatting tends to be messed up and some websites won't load at all (they stop at waiting for website...). Ping for all of these sites is however fine. Also uploading and downloading either from sites like rapidshare or using torrents is also fine. The same ISP also provides a second similar connection which is connected through a wireless router (mine is connected directly - no modem or router) to two computers (one via a wired connection and one through wireless) both running Win 7 and everything works fine over there.
Things I've tried. I tried using the router changing it's setting to my connection and connecting through that but the problem remains. After googling I thought it might be an MTU issue so tried this:
