Debian Configuration :: Seeing Slow Network Performance With Large Mtu?

Apr 22, 2010

I have 2 ASUS Boxes (one with 8GB, one with 4GB) When both mtus are set at 7200, using scp to copy a 56MB file takes 2:06. If I reduce either mtu to 1500, the speed is 2 seconds. I'm wondering if this is some kind of kernel bug or driver bug or what. For the moment, I've lowered the mtu to 1500 to get the performance out of the machines, but find it interesting that what should make it faster is actually slowing down. Where should I post this to get it looked at? Is anyone else seeing it.I see a similar performance issue with smbclient too.

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Debian Configuration :: Deconfiguring Network Devices Is Slow

Jan 26, 2010

I've been keeping my feet wet learning Debian. So far only in a virtual machine but I have had that machine running every day. I'm running a Lenny/Squeeze mix.The system is running well, yet every time I reboot or halt the system there is a long pause at the "Deconfiguring network devices" message. I traced the message to S35networking. With this virtual machine, which is a model for my eventual physical machine installation, I have only a single wired eth0 NIC (pcnet32).

I'll take a wild guess the script might be trying to find additional cards to halt, or perhaps a wireless card that does not exist, but that is just a guess. I'm stil learning my way around with how the init.d scripts and various /etc config files interact.I'm using a static IP address. DHCP is disabled, as far as I can tell. I did not notice anything in the logs.

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Debian Configuration :: Slow And Laggy Network With AR5008 (Ath9k) - XP Okay

Mar 4, 2011

I got a TP-Link WN951N Wireless-N PCI card for my Squeeze HTPC (this is AR5008. Performance is awful. On the lucky runs I'm getting 4 MB/s from Samba, most of the times I'm seeing 1-2 MB/s, and sometimes less than 1 MB/s. Also, ssh is not smooth, e.g. when I type commands, it can take seconds before text appears on the console, or I get slo-mo. Forcing 11g gets me a consistent 2.2 MB/s but lag is still there.

The machine has also been tested under XP SP3 and pulled off a solid 11 MB/s on a large file with no lag, so the hardware would seem OK. I've tried several kernel versions (both Liquorix and Debian stock), and a couple versions of compat-wireless (2.6.38-rc4 and 2011/03/03 bleeding edge), with little variation in outcomes. The logs got no weird messages in them, although with the more recent drivers/kernels iwconfig looks like this:

wlan0
IEEE 802.11bgn ESSID:"GuessIt"
Mode:Managed Frequency:2.457 GHz Access Point: x:y:z:t:u:w
Bit Rate=270 Mb/sTx-Power=19 dBm
Retry long limit:7RTS thr:offFragment thr:off
Encryption key:off
Power Management:off
Link Quality=46/70 Signal level=-64 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:64 Invalid misc:19967 Missed beacon:0

Tx discarded packets are through the roof and excessive retries is not bad either. The system doesn't run NetworkManager, wicd or whatnot. All of the wireless is configured through /etc/network/interfaces:
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
iface eth0 inet dhcp
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-driver wext
wpa-ssid GuessIt
wpa-ap-scan 2
wpa-proto RSN
wpa-pairwise CCMP
wpa-group CCMP
wpa-key-mgmt WPA-PSK
wpa-psk <hexbabble>

Did I commit some horribly naive mistake or overlook something Really Important(tm) ?

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Ubuntu Networking :: Slow Network In When Copy Large Files From Main Desktop Pc To Mediaplayer?

Dec 28, 2010

I have just rewired my LAN using Cat 6 cables. Download- and Upload speeds to my main machine are great :However, it seems my LAN speed is very slow. when I copy large files from my main desktop pc to my mediaplayer, I only reach a speed of 3,7 MB/s in Ubuntu 10.10 using SMB protocol to connect to mediaplayer. I use a Sitecom WL351 Router that works fine as far as I can see. Using my dualboot Windows 7 I can copy the same large files using same setup (same pc to same mediaplayer) I can copy with almost 10 MB/s. I appreciate a little protocol overhead in Ubuntu, but this seems to be a little too much

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Debian :: Game Performance - Impossible To Play - Open But Everything Is So Slow And Choppy

Feb 20, 2011

My last laptop was replaced (I gave it to my step-dad, his laptop broke and I bought myself a new one).

I am running Squeeze (as I was on my other laptop) and everything is fine except for the games. On my other laptop games like OpenArena and Warzone 2100 ran perfectly fine, but on this laptop, they are impossible to play. The game will open, but everything is so slow and choppy that it takes a couple of minutes to even move the cursor to the exit game buttons.

My current laptop is an HP ProBook4525s with the current specs:

AMD Athlon Dual-Core P340 2.2 GHz processor
2GB DDR3 RAM
ATI Mobility Radeon HD 4250 Graphics Card

I'm not sure what other information to put here, I've tried searching how to fix this and most people say to lower the resolution and details for the games but that doesn't work, heck, even Tux Kart is too slow to play!

When I installed squeeze I was informed that I didn't have the rtl8168d-2.fw firmware for my laptop, I'm not sure if that helps here at all (can't seem to find what it is for, the only things that google gives me are very technical with fixes that involve re-compiling the kernel).

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Debian Configuration :: Transfer Large Files Between Windows ?

Jul 17, 2011

I would like to transfer my music library and movie collection from my Desktop computer running Windows Vista and my laptop running Debian Squeeze. I have the laptop connected via wireless but it's possible to connect the two either directly with a CAT5e cable or through the router. I'm just wondering what the best way to do this would be.

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Debian Configuration :: Intel GM45 Terrible Performance.

Jun 7, 2010

Ok first off, I love debian, but on my new notebook I am getting a little frustrated with the terrible, video performance.Direct rendering is enabled on both systems, and openGL is working (I can if I wanted to use compiz etc...) fine on both systems, just running slow on debian.

I have tried Lenny, Squeeze and Sid, I have compiled the intel driver (and Mesa3D) from git and got it working (I am sure its working because its given me a slight boost), I ahve also tried building the latest stable (and RC2) kernel.If I install ubuntu 9.10 I get pretty decent 3D performance, its not ground breaking, but hey its an intel chipset so I am not expecting to kick the latest nvidia / ati card's backside.I really dont want to use ubuntu, I find it unstable when compaired to debian, but I also want to be able to play the odd game when I am bored, and at the moment I just cant do that under debian

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Debian Configuration :: Jessie LVM - Full Disk / Large Logs And GParted

Sep 23, 2015

So, my issues since upgrading to Jessie seem to compound. When I fix one issue, two more arise. Right now, I have a full system disk. How it got so full. So I started poking around. I ran

Code: Select all find / -type f -size +50M -exec ls -lh {} ; | awk '{ print $NF ": " $5 }'

Found a few files I could delete, and did, but I also found Code: Select all/var/log/syslog.1: 33G
/var/log/messages: 33G
/var/log/user.log: 33G

What I find strange is that they're all exactly 33G each. So that accounts for the missing 99GB I deleted them, however only recovered 27Gb. Whats weird is when I type df -h I get

Code: Select allFilesystem      Size  Used Avail Use% Mounted on
/dev/dm-0       106G   74G   27G  74% /
udev             10M     0   10M   0% /dev
tmpfs           3.2G  9.7M  3.2G   1% /run
tmpfs           7.9G     0  7.9G   0% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           7.9G     0  7.9G   0% /sys/fs/cgroup
/dev/sda1       228M   27M  189M  13% /boot
/dev/sdb1       1.9T   62G  1.8T   4% /media/ntfs
tmpfs           1.6G     0  1.6G   0% /run/user/0

What are the tmpfs's and how can I reclaim that space, and what is /dev/dm-0 and why is that taking up so much space?

I have 2 LVGs vgdisplay -v

Code: Select allroot@SETV-007-WOWZA:~# vgdisplay -v
    DEGRADED MODE. Incomplete RAID LVs will be processed.
    Finding all volume groups
    Finding volume group "WOWZASERVER"

[Code] ....

After deleting the log files, I was able to regain access to my GDM session. But I still cant find out what /dev/dm-0 is, and where all the 75 GB is being taken up.

I just noticed, however, even though I can access the drive A-OK via browser, terminal, and web services (Our wowza) when I enter gParted I get this error for sda, my primary OS drive!

Code: Select all  Libparted Bug Found!

Error informing the kernel about modifications to partition /dev/sda2 -- Invalid argument. This means Linux won't know about any changes you made to /dev/sda2 until you reboot -- so you shouldn't mount it or use it in any way before rebooting

Now that I'm in gParted I see 3 partitions: [URL] ....

It reports now, that I have used ALL of my disk space.

Post Log delete, and fresh reboot, this is what Code: Select alldf -h outputs

Code:
Select all Filesystem      Size  Used Avail Use% Mounted on
/dev/dm-0       106G  8.7G   92G   9% /
udev             10M     0   10M   0% /dev
tmpfs           3.2G  9.8M  3.2G   1% /run
tmpfs           7.9G   80K  7.9G   1% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock

[Code] ....

What the heck is going on?

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Debian Configuration :: Partitioning The Four Individual Drives To Get Maximum Performance / Space From Them?

Jan 25, 2011

I've got 4 identical 1 TB drives and would like to use them in a software RAID configuration on my home server. I'm running Debian Linux using 'mdadm' utility to manage the software RAID. I don't know how much I've read is fact or dated or even false so I decided I would ask here to get help from people who know more about this than I do. This is essentially just a file server machine to store all my data so being that I've got four identical SATA hard drives, I was thinking about doing RAID level 5. I guess I'll start here and ask if that is the recommended level of RAID. I think RAID level 5 will be fine for my general server usage. My second issue is partitioning the four individual drives to get maximum performance / space from them. Basically just asking here how would you or you recommend I partition the drives? I was thinking about doing three seperate partitions per drive:

/dev/sda1 = 4 GB (swap)/dev/sda2 = 1 GB (/boot)/dev/sda3 = 995 GB (/Now from that partition schema above, obviously all the types will be 'fd' for RAID and the partition for /boot is going to be bootable. My confusion is that I read Grub doesn't support booting from RAID 5 since Grub can't handle disk assembly. If /dev/sdx2 (sda2, sdb2, sdc2, sdd2) are partitioned for /boot (bootable), how would you guys configure this RAID to match up equally? I don't think I do a RAID level 1 on 4 identical partitions, right?

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Ubuntu Servers :: Performance For Large Scale Website Or Critical Mission?

Aug 6, 2011

anyone of you could share if you have been using ubuntu for large scale website or critical mission project, say for 500.0000 secure transaction per 3 hours with 4 million users accessing server. how does ubuntu perform?

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Debian Configuration :: When Install NIS / System Becomes Very Slow

Apr 12, 2016

I have installed jessie on a couple of machines. One is configured as the NFS filesystem exporter and NIS server. The other one, I am trying to configure as NFS and NIS client. NFS does not seem too much of a problem, I can mount the exported filesystem to a directory in the client and unmount it, but when I install NIS the system becomes very slow. Any command preceded by "sudo" takes a very long time (a few minutes) to complete. Then, upon rebooting the system, it reports many services failed to start (login, accounts, modem manager, avahi, network manager, exim). When if finally completes, I get a terminal login, instead the graphic login window.

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Debian Configuration :: Wlan Really Slow Under Lenny

Jan 10, 2010

i use a telekom s100 set-top-box, which originally had a prism54 wlan-card. but wlan was very slow. but the driver was working well and it did not seem to be a configuration issue, so i assumed that its that card which is so slow. following i purchased a atheros based wlan-card which is working perfectly well with the ath5k driver of my linux kernel (2.6.26-1-686). but the connection is pretty bad anyway. i get max 300kb/s from pc to pc. as its the same with 3 different cards i tested in the s100 i assume it is a configuration issue? or might there be chipset or mini-pci-slot limitation?

when i check the connection with iwconfig the bitrate is somewhere between 1-54mb/s, rising to 54mb/s and then falls back to 1mb/s, rising to 54mb/s again, falling down, its an infinite loop. im using wpa_supplicant for the connection, but i don't think thats the malefactor. well, you never know .. i tried to set the bitrate with iwconfig wlan0 rate 54M but that ended in a disconnection ...

[Code].....

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Debian Configuration :: System Running Is Very Slow

Oct 28, 2010

I'm running testing and over the last week or two my system is getting slow. Any disk access slows everything to a crawl. Even the cli can take several seconds to display characters as I type them.

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OpenSUSE :: Overall Slow Performance Of 11.2?

Dec 22, 2009

First of all, apologies if this is not the correct place to post this. I recently installed openSUSE 11.2 (Gnome, 32bit) on my newish PC. It is an Acer Aspire X3200 (AMD Phenom X4 Quad-Core, 1.8 GHz, 4096 MB, NVIDIA GeForce 8200 Integrated, can provide detailed specifications if needed). I've to say I am very disappointed with the results so far! Sorry to say this but I'm having a whole load of problems that I never had when I had Vista or with current Win 7. Here are the issues:

1. Slow network performance. I've disabled ipv6 but it is still the same. Not only when I use Firefox, it is also slow when I use console based programs. 2. Instability - Gnome system monitor crashed 6 (or more) out of 10 times I use it. System Monitor users more CPU resources than anything else! Also when I started the PC this morning, I only had the desktop wallpaper. No icons, no taskbar, no mouse movements or menus, nothing. I had to force shut down it after a while. I'm sure we all are familiar with this on XP but I've never seen something like that on Linux!

3. Annoying noise coming every time I move mouse (mainly when scrolling) and even if I'm not doing anything. I suspect it is coming from my HDD indicator as it always blink even when nothing is running. This can't be a hardware issue as I've never had this on Vista or Win 7 (it is virtually silent on Vista and XP but not on SuSE) This noise is driving me totally mad.

4. Slow performance in general. No matter what I do, even typing this on this text window, it seems everything is running so slow. I never had this problem when I was running 10.x on my 6 year old PC. CPU is always running around 20%-30%, when I don't run any other applications but just Firefox (I have Foxclocks, Delicious and FEBE as add-ons and I don't have any problem using them on Vista or Win 7). I am using Compiz, not sure if this has got anything to do with that.

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Debian Configuration :: Graphic Slow After Kernel Upgrade From 3.16 To 4.1

Sep 24, 2015

Intel Core i7-5500U with Intel HD Graphics.So I updated to the backports kernel and backports intel xorg drivers and I have the weirdest thing.Everything is stuttery even cinnamon desktop effects are no longer smooth. If I boot back to 3.16, everything is butter (except the screen corruption). Even my favorite wine game dropped 25% in fps.

I remember that on windows, if the cpu is too slow (pstate_min_speed), graphics is also stuttery. However, increasing /sys/devices/system/cpu /intel_ pstate/min_perf_pct even to 100% didn't do the trick. I suspect, that this measure is causing it: URL....

how to increase the performance again? I just found out, after running glxgears (with about 40 fps), that xrandr shows an available framerate of 40fps

xrandr
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 293mm x 165mm
1920x1080 60.00*+ 59.93 40.00

I guess that's what makes it feel slow. Do you know how to get that back up to 60 (fixed)? It seems like the screen refresh rate set in xrandr has no effect on the problem. When I boot, glxgears runs with 60 fps and everything is fine. After a while, it drops to 40 and the whole desktop keeps stuttering. if I change the resolution with xrandr and then change it back, it goes to 60 again for a while

LVDS_DOWNCLOCK is disabled
Code: Select allsystool -m i915 -av
Module = "i915"

  Attributes:
    coresize            = "1028096"
    initsize            = "0"
    initstate           = "live"
    refcnt              = "5"
    taint               = ""
    uevent              = <store method only>

[code]...

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Debian Configuration :: Access And Connecting To SAMBA Are Too Slow

Mar 29, 2016

Let me introduce myself, my name is Carlos Alegría from Chile and I'm System administrator for a educational Institute. We use samba+ldap, for login accounts and file sharing but we not use samba with PDC.

Long time ago at the 2009 year, I was Installing the same system and this worked perfectly. But on our summer the hard disk of server has broken, so i was need installing all the system again. So the problem is with SAMBA, when i connect to the network resource, this is to slow, and when i try transfer files are slow.

My sistem is on Debian 8 Jessie and the Samba Version is 2:4.1.17+dfsg-2+deb

Code: Select all[global]
   workgroup = LABORATORIO
   netbios name = Shinigami
   server string = debian

[Code].....

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Debian Configuration :: Torrent Traffic Very Slow / Make It Up?

Jul 10, 2011

I am running on debian squeeze 6.0.2. I have been using it for the last id say 3 weeks and really am enjoying it.

I generally use transmission-gtk to share files over the internet. Normally I seed torrents at 110-160kb/s for hours at a time. However after messing around with firestarter my upload speed for seeding torrents rarely peaks over 70kb/s. I have purged firestarter with no success of my regular upload speed, and am very confused as to what happened. I also notice sometimes when it will get to about 70kb/s it will immediately drop down to the 20-30kb/s range.

For incoming bittorrent connections I use port 37294. I have set port 37294 to be allowed in my firewall, and forwarded in my router (since purging firestarter did not help I just reinstalled it).

I have also read allowing ports 6881-6889 is important, but I have never done that in my history of using torrents, and I have never experienced a decrease in UL speed like this.

Have I done something incorrect? I have never had this issue on other machines?

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Debian Configuration :: Direct Ethernet Rsync To NAS Very Slow (74kbits)

Jan 30, 2016

So I have a GoFlex NAS driver, which according the specs has a theoretical maximum performance of 100 MB [URL] .....

I connected by ehternet to my PC (GNU/Linux, Debian 8 ) to do a backup.

I mounted it with cifs:

Code: Select allmount -t cifs "//goflexhome.local/GoFlex Home Personal" /mnt/gf/per/ -o credentials=/root/gfpass,uid=1000,gid=1000

And then tried rsyncing my home folder.

Code:

Select allDIR=/home
BACKUP_FILE=/mnt/gf/per/bck2016/

FLAGS=" --archive --one-file-system --acls --xattrs --numeric-ids --fake-super --progress  --human-readable --ignore-existing --log-file="backup.log" "                                                                                                                 

FLAGS+=" ${DIRS} ${BACKUP_FILE}"

rsync ${FLAGS}   

I then used iptraf to check the performance and I get miserable results (from the PC), even below 1 MB:

total 74.7 kbits
in 30.4 kbits
out 48.5 kbist

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Debian Configuration :: Sata Disk Write Speed Is Very Slow

Sep 14, 2010

I got a new machine with GA-p55A-ud3 mobo and a WDC WD10EARS 1T disk. When I tried to benchmark the disk IO, I was suprised by the low write speed:

[Children see throughput for 1 initial writers = 35962.63 KB/sec
Parent sees throughput for 1 initial writers = 35962.63 KB/sec
Min throughput per process = 35962.63 KB/sec

[code].....

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Debian Configuration :: Xen4 On Squeeze - Slow Mysql In DomU

Oct 23, 2010

I have a mysql server in guest domU on debian squeeze. when i create test table and do INSERT INTO test (name, value) VALUES(RAND(), RAND()); Query OK, 1 row affected (0.28 sec)

At other physical server with same configuration Query OK, 1 row affected (0.00 sec)

I try this several time but on physical server max value never get over 0.05sec and on VM lowest value was 0.13sec.

Another tests:

On physical server:

OLTP test statistics:

Threads fairness:

on VM:

OLTP test statistics:

Threads fairness:

performance of disk write speed on VM is much better then on physical server .

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Debian Configuration :: Squeeze Installed - Slow Responses To Ping

Feb 15, 2011

Just installed squeeze and noticing slow responses to ping. Ping with -n is fine, and as expected. Ping without -n is very slow to appear on the screen.

ben@WOPR:~$ ping google.com
PING google.com (74.125.230.114) 56(84) bytes of data.
64 bytes from 74.125.230.114: icmp_req=1 ttl=54 time=26.2 ms
64 bytes from 74.125.230.114: icmp_req=2 ttl=54 time=25.9 ms
64 bytes from 74.125.230.114: icmp_req=3 ttl=54 time=29.3 ms
64 bytes from 74.125.230.114: icmp_req=4 ttl=54 time=25.5 ms
^C64 bytes from 74.125.230.114: icmp_req=5 ttl=54 time=25.8 ms

--- google.com ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 20199ms
rtt min/avg/max/mdev = 25.514/26.569/29.308/1.399 ms
ben@WOPR:~$ ping -n google.com
PING google.com (74.125.230.115) 56(84) bytes of data.
64 bytes from 74.125.230.115: icmp_req=1 ttl=54 time=25.6 ms
64 bytes from 74.125.230.115: icmp_req=2 ttl=54 time=26.0 ms
64 bytes from 74.125.230.115: icmp_req=3 ttl=54 time=26.8 ms
64 bytes from 74.125.230.115: icmp_req=4 ttl=53 time=21.5 ms
^C
--- google.com ping statistics ---
5 packets transmitted, 4 received, 20% packet loss, time 4006ms
rtt min/avg/max/mdev = 21.540/25.042/26.859/2.064 ms

I've tried disabling ip6, disabling avahi and adding options single-request to my /etc/resolv.conf - problem remains. If it helps when installing Squeeze was prompted to install firmware-realtek, which I didn't have. So downloaded onto usb from another machine installed once setup was complete.

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Debian Configuration :: Slow Boot Waiting For DHCP On Wire?

Mar 23, 2011

Up until very recently I've had a wired network, and at boot I'd see messages about DHCPREQUEST and DHCPOFFER and stuff as it set up the wired network.

Now I've just got wireless working instead, but it still tries to use DHCP on the no-longer-existing wired network. So it says "DHCPDISCOVER on eth0..." and waits for a bit, then again and waits again, and all the time the boot is waiting for a reply to its DHCP requests and it's not going to get one. It doesn't seem to do any harm, because once it's given up and proceeded with the boot then the wireless does seem to work fine, but I'd like to speed up the boot a little by cutting out this needless waiting. Has anyone got an idea how I can stop it? I tried in Preferences-Network connections and in Administration-Network, and in System Tools-Network tools, and also from the network icon in the task bar, but I can't find anything which lets me configure the wired network eth0 or disable it or disable the DHCP.

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Debian Configuration :: Slow Wifi In Squeeze With Atheros Ar928x?

May 14, 2011

I have Acer Aspire 4740 laptop with Atheros ar928x wireless. My wireless is very slow, unstable. Wireless card still works well and fast in Windows (dual booting). After searching I see that there are many Ubuntu users have the same problem in Ubuntu 11.04 with this card.

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Debian Configuration :: Wheezy Xfce 4.8 VERY SLOW First Thunar Startup

May 16, 2011

I upgraded my main PC's Xfce 4.6 to Xfce 4.8 this morning.Now, every time I start Thunar for the first time after a new boot, it takes about 30 seconds to appear, and then about 10 seconds later, a second instance of it appears.After that, Thunar appears instantly every time I start it during that same session. But if I shut-down or restart my PC, Thunar again takes about 30 seconds to start up, and a second instance of it appears about 10 seconds later.

Google searches seem to indicate that people running other distros are also experiencing this problem. On advice in a different forum, I deleted the ~/.config/Thunar folder and restarted my PC, but that didn't help -- it created a new Thunar folder, but the long delay and the double-Thunars are still there every time I run Thunar for the first time in a session.

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Debian Configuration :: Slow Custom Kernel Build Amd64

Aug 17, 2011

I used make-kpkg to build the 3.0.0 source debian wheezy on a dual 3.4GHz Xeon/L1-16k/L2-1mb/800Mhz bus with 4GB PC2-3200 ECC ram and Ultra 320 SCSI, using CONCURRENCY_LEVEL=4 (2 hyperthreading cpus=4 cores). The build was slower than molasses in January! Top reported cpu usage total between 10% and 25%. Why won't the build use the amount of machine it has available. One footnote: I wasn't using swap space. It literally took over an hour to build the deb kernel package.

My notebook from 2003 is at least three times faster building the 3.0.0 debian kernel source. Is it possible that this might cause improvement: make -j4 KDEB_PKGVERSION=version deb-pkg

over

CONCURRENCY_LEVEL=4 make-kpkg --initrd --revision=123x kernel_image?

Could amd64 vs. i386 have some influence? Could the small processor caches on the XEON cpus have an effect. The 64-bit machine absolutely flies doing everything else. I'm miffed! I've used debian since woody, although I am not an expert, but I'm no slouch!

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Ubuntu :: 11.04 - Performance Slow And Laggy

Apr 21, 2011

Just installed 11.04 on my netbook (eee1015pem) and its laggy! Went from super fast 10.10 to slow and laggy 11.04.

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Ubuntu :: Firefox Slow Performance In 11.04?

May 25, 2011

Just curious if anybody else had experienced Firefox being slightly sluggish in the new release of Ubuntu? I'm running 64-bit Ubuntu on a Dell laptop (Inspiron 1445) with a fresh install of Ubuntu 11.04 on it. I haven't touched or messed with any of the settings.

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Ubuntu :: Rsync Really Slow On Large Files?

Mar 1, 2010

I have Ubuntu on both my laptop and desktop machines, both are connected to the same network. I back up the laptop to the desktop by running the following on the laptop:

rsync -avv --stats /home/alisdt alisdt@xxx.xxx.xxx.xxx:/home/alisdt/laptop_backup (with the IP address of the desktop instead of the many x, obviously). Whenever rsync hits a large file (greater than a few MB), the network use rapidly drops to ~60KB/s (that's kilobytes not bits). When I copy the same file to the same place using scp, I get > 500KB/s throughout the transfer. Things I've tried:

* mounting the desktop home dir on the laptop using SSHFS -- a simple file copy is fast, rsync is still slow
* ditto with NFS
* rsync --whole-file option, in case the delta-transfer algorithm was choking on large files
* rsync --inplace option
* HPN-SSH (http://www.psc.edu/networking/projects/hpn-ssh/) to enable dynamic window and unencrypted bulk transfer, just in case it was some ssh bottleneck I think it's either an rsync application problem, or a network problem that is only affecting rsync. Any ideas, or other ideas of what I can try to debug? In case it's relevant, I'm using 9.04 on both machines. (A standing bug prevents me from upgrading the laptop, and I haven't bothered to upgrade the desktop).

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I am using Debian sid 4.1.3-1 and when i shutdown the system it takes 3 - 5 minutes before actually shutdown, there is only a black screen until the hdd led start flashing and after that the system finally shutdown. The weird part is that sometimes it happen in less than 30 seconds , how can i figure out where the problem is ?

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Debian Configuration :: Extremely Slow Transfer Rate On Flash Disk ?

Jul 12, 2011

Same computer and flash. Two results on different OS:

Write speed under debian: 0.4 MB/s

Write speed under Windows: 6.6 MB/s

From what i've been reading on the net I guess it's something to do with the mount - sync option.

I've notice that there are couple of workarounds but all of them are pretty tedious.

Is there any simple (GUI - one/two clicks) tool that allow to mount/unmount flash disk easily using the correct options?

I'm using Squeeze 6.0.2 (Kernel 2.6.32-5-amd64), gnome 2.30.2

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