CentOS 5 Hardware :: Poor I/O Performance On IDE/SATA Disks?
Jan 13, 2010
I've just removed fedora 10 and installed CentOS 5.4 both x86_56 on my Lenovo ThinkCentre 9091-CTO workstation, and observed serious performance degradation while intensive I/O operations and huge load without significant CPU consumption in user mode with about 50% in I/o wait.For example if I do the "tar xjvf some_large_tar.bz" file and run vmstat i get the output below. This is the only cpu and io intensive process running. The load gets up to 6 on C2D CPU and the machine has unacceptable responsivness.
[root@f00 ~]# vmstat 5 10
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
I just installed CentOS 5.4 on a brand new DL160 G6. In order to get the data raided I decided to go with mdraid. But I see quite harsh performance hits, I have no GUI or anything and just the basic server installation, and even the console feels sluggish.
The output from getinfo.sh disk:
==================== BEGIN uname -rmi ==================== 2.6.18-164.15.1.el5 x86_64 x86_64 ==================== END uname -rmi ====================
ok, we had to move one of our databases due to failing hardware. This box is newer than the old but it's just dog slow. 1st I thought it was mysql but now I am realizing it's the network. As a test, I tried copying a remote file to that box and the old server (located at the same co-lo, same provider), same switch, etc.Here are the results;
Old server: access_log.1 100% 4192KB 1.4MB/s 00:03
New Server: access_log.1 100% 4192KB 72.3KB/s 00:58
So now I see why people were complaining about webpage load times, etc. I can't figure out why the network latency. I looked around a bit, see below for some things, I thought mtu, nic speed, etc.
mii-tool shows; eth0: 100 Mbit, full duplex, link ok eth1: 100 Mbit, full duplex, link ok[code].....
Are there other things I can type to test or provide more feedback somehow to get more information.
I installed on a Intel SR2612UR Server with integrated LSI Expander and a Adaptec 5805Z controller a Raid 6 Array with 12x 2TB Drives (2 ext4 Partition: 16TB, 2TB), but I get very poor read speed depending on the blocksize that I set it vary between 130 MB/s and maximally 170 MB/s which is really poor for a Raid 6 Array of 12 drives, on a similar Dell Server I get above 650 MB/s. The Adaptec Controller has the latest Firmware installed.
I have servers which contain SATA disks and SAS disks. I was testing the speed of writing on these servers and I recognized that SAS 10.000 disks much more slowly than the SATA 7200. What do you think about this slowness? What are the reasons of this slowness?
I am giving the below rates (values) which I took from my test (from my comparisons between SAS 10.000 and SATA 7200);
dd if=/dev/zero of=bigfile.txt bs=1024 count=1000000 when this comment was run in SAS disk server, I took this output(10.000 rpm)
(a new server,2 CPU 8 core and 8 gb ram)
1000000+0 records in 1000000+0 records out 1024000000 bytes (1.0 GB) copied, 12.9662 s, 79.0 MB/s (I have not used this server yet) (hw raid1)
i'm trying to run ubuntu 8.10 intrepid ibex on an old hand-me-down laptop that i got from a family member, and i've noticed that the performance is actually much worse than it was on windows xp professional (32-bit).
first of all let me give you my specs: ibm thinkpad r32 intel mobile pentium 4-m 2.0 ghz ati radeon mobility m6 (i think this is actually the mobility radeon 7000 igp) with 16mb ram 256 mb ram (pc-2100)
i understand that these are very low performance specs, but it feels like the computer is running very sluggishly even for those specs. the computer ran just fine in windows xp, but is extremely sluggish in ubuntu. it seems like it detected all the hardware just fine, but i feel like it may not be utilizing the cpu and/or video to the extent that it should be. a couple of places where it really seems to struggle is when first opening new programs, viewing flash intensive web 2.0 type webpages (i.e. videos), and listening to music/podcasts (with rhythmbox).
it seems like rhythmbox really kills my performance more than anything else, but the performance is poor all around compared to xp, and i feel like that shouldn't be the case. like i said, i understand that the specs are poor, but it feels like it's not even living up to those specs. i know that 8.10 is old and outdated now, but it's what i had laying around and i figured that it might perform better on this old deprecated laptop than 9.10 would anyway. am i wrong in this assumption? would 9.10 perform better for me?
I am running karmic and have wireless performance which is terrible on the EEE 1000HA I see it as low as 1mbit at times and others at 24mbit and briefly at 48 and 54mbits. running an Internet speed test with wireless I get pathetic speeds as low as 15Kbps, Its 5 feet from the wireless router ... and other machines that are wireless in the same area show 54mbits and perform great ... any one solve this problem with the asus EEE1000HA running on karmic?
I just installed Ubuntu 10.04 on a laptop that was given to me. It is having a lot of lag issues,especially when playing videos and visiting websites using flash. It's an Intel Pentium 4 2.4GHz machine. I think that it should perform better because I had used and AMD Sempron 2.0GHz machine with Ubuntu before and video playback was much better than this. I'm thinking that my problem is the graphics card driver. Here is the card that this machine has:
Code: :~$ lspci | grep Radeon 01:05.0 VGA compatible controller: ATI Technologies Inc Radeon IGP 330M/340M/350M The AMD machine was using a VIA graphics chipset.
I used the command "Xorg -configure" to create a xorg.conf file, hoping that might help. But it didn't. Here it is:
Is there any tweaking that I can do in the xorg.conf that might help? I don't know which of those options I should set. I also tried changing the driver to "ati" but that did nothing. found some info for settings with "man radeon", I'm going to try some of those out.
I have an ATI RADEON 7000 (taken from lspci) 64 MB graphics card. My computer has a 700 MHz Celeron CPU and 650 MB RAM with Ubuntu 10.04. Anything graphical is slow. I cannot even play basic games like SuperTux. I think it is a graphics driver problem. Will this card ever work well with Linux, what do I need to do?
I experience very poor desktop performance on my system. General clicking responsiveness is poor, taking over second or two to focus to a new window, move windows around, ... etc. The Xorg process constantly uses over 60% of the CPU even when I'm doing nothing, and when I do click around it will quickly go up near 100% usage. Performance is initially OK when I first launch into my Gnome environment, but it soon deteriorates within 30 minutes or so. Eventually, after days of being up and running, my desktop will crash.I am running Ubuntu 10.10 with latest upgrades. I have four monitors attached to my "nVidia Corporation G98 [Quadro NVS 420]" graphics card. I am running the "NVIDIA accelerated graphics driver (version current)" recommended in the Ubuntu "Additional Drivers" app. I get a fair number (hundreds) of these in my /var/log/Xorg.0.log:
though they don't appear constantly while my desktop is running (I assume they may come in batches?). Not sure if they're relevant. A separate issue, though possibly related, is the SpeedCrunch app (a desktop calculator) is guaranteed to crash my desktop as soon as it gets focus. Here's the relevant output of "lspci -v" which shows my graphics card:
03:00.0 PCI bridge: nVidia Corporation NF200 PCIe 2.0 switch for Quadro Plex S4 / Tesla S870 / Tesla S1070 / Tesla S2050 (rev a3) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=03, secondary=04, subordinate=06, sec-latency=0
So for the last, oh, three or four hours now, I've been trying to get videos to play properly in Ubuntu. I have the default player, I have vlc, I (apparently) installed mplayer, but it won't play anything at all.
I was having horrible screen tearing with standard definition .avi's in vlc, fixed that by setting vsync in catalyst control center to always on or whatever it is.
Now, I have tried to run a 720p x264 video. It PLAYS, but not well. Audio is fine, however video is all jerky in VLC, and in Totem it's just a mess of screen tearing (although the video does no jerk on that player).
I have just spent HOURS trying to get VIDEOS TO PLAY. This makes no sense. Playing a video should be the simplest thing in the world for any OS to do, but with Ubuntu it is like pulling teeth. I have NEVER been so frustrated while using a computer. What is going on here?
BTW, I installed every single thing needed to use mplayer but it still does not work. The player comes up but will not play any type of file.
My system specs: 2.2Ghz dual core (intel) 3gb ram 1GB radeon hd 4650 vid card asus ipibl-lb mobo
I was really enjoying Ubuntu until I got around to trying to watch some videos. Now I am maybe minutes away from going back to vista. At least on there I can watch full 1080p videos if I want with no problems.
I am running kubuntu 9.10 on a dell inspiron 14 with an intel GM45 graphics card. When I run 3d games like Nexuiz, openarena and tremulous I get really random performance. Sometimes things are totally playable with somewhere between 50-80 fps and other times I get maybe 4 fps and everything takes forever to load. These effects persists between logouts, X restarts and reboots! I get no errors when I run things in console either.I never really play games much but when something doesn't work...
iwconfig shows that the bit rate is 130Mb/s and link quality is 98/100. I'm using the wcid network manager instead of defaul gnome one. I'm getting lots of packet loss and performance is very bad. The connection is practically unusable. I've tried installing the compat wireless backport package but that did not work at all.
I have an ATI Radeon x1300 graphic card on an Intel platform.Since the last reinstall my Debian Squeeze system shows very poor performance in glxgears,only 80-90 FPS. Last time I had a problem the kms setting in the kernel. I disabled the modding setting in GRUB and then glxgears showed about 900-1300 FPS. Now,the problem is back, even though I made the same setting in the boot loader.
i had recently loaded squeeze and had an issue with the 2d performance.i.e when being prompted for the root password, the shading slowly draws down the screen several times before stopping at the final darker shade. i then added the linux-firmware-nonfree package. all worked extremely well, even compiz, but i don't really care about compiz. i just loaded it to see how it performed. i then distro-hopped a bit and when i came back to squeeze the first thing i did was add the package, but the video is acting like i haven't added the package. i've searched for an answer, but have not found anything recent to indicate if xorg was upgraded or what.stable lenny works fine, but i'd rather have the nice console fonts when not in x and more up to date apps like gimp and xsane in squeeze.
i installed latest ubuntu server 9.10 on my mini itx board which i have 1 4gb IDE disk and 4x2TB sata disks attached no i want those disks to automount on startup is there a way without modifiying fstab? the thing is, i want to expand the storage over time (next hard disks in a few months) and maybe a second mainboard in a year so i need a simple way to mount everything without being to mainboard specific like doing fstab entries
used to run ARC linux and Windows 7 on my computer and i am now trying to install Ubuntu 10.10 X86_64When i used the live disc of Ubuntu 10.04 and load the installer it finds my four harddrive they way it should... sda,sdb,sdc,and sdd...When i however try the same with ubuntu 10.10 it displays my usb cardreaders drives first and then my hardrives as sde sdf sdg and sdh.I tried installing ubuntu with the reader unplugged and then reconnecting it after installation...But when i then boot with the reader attached it says it cannot mount drives sda,sdb,sdc and sdd becuase they are not ready.I think it is again detecting the usb cardreader before the sata controller ...Is there a way for me to alter the boot detection order so it will find my harddrives first and then the usb cardreaders ports ?
How to configure the master and slave on 5 Sata disks? Is there that or it is automatic.I install Debian, ok, master boot ok, on the first sataAnd at reboot, just after install, the boot hangs and no grub appears.
I have an old Amilo D laptop (compal cy23 mainboard) which I want to use as a NAS. As I wanted to add a big SATA drive I bought a PCMCIA SATA controller based on Via VT6421 chipset. This is where I have a problem. My drive is very slow (around 8mb/s) with this configuration. Other PATA drive is around 22-23mb/s. My O/S is latest archlinux. Before trying linux
This is a thread I've moved over from the install forum and is hopefully more focused. Sorry if I have violated some protocol. Problem I have a new machine build configured to dual-boot Windows 7 and OPENSUSE 11.4. Network performance in Windows is very good but network performance in OPENSUSE is very poor.
I have Fedora 13 installed in a new computer, and form some weird reason, udev is skipping three of my HDs. Looging the output for udev --triger, the entries for the HDs are skipped
Code: [root@storage ~]# lspci 00:00.0 Host bridge: ATI Technologies Inc RD780 Northbridge only dual slot PCI-e_GFX and HT1 K8 part 00:02.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (external gfx0 port A) 00:06.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (PCI express gpp port C) 00:07.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (PCI express gpp port D) 00:0a.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (PCI express gpp port F) .....
Trying to install SUSE on a perfectly working PC that was running Windows. Blew away all the partitions and formated the drives.When trying to install SUSE, Installer will not detect my two hard disks. Tried with version 10.x, 11.1 and 11.2, without success.My Mobo is a XFX GeForce 8209, and my SATA drives are both Seagates (1x120GB, 1x320GB). I've tried different SATA mode selection (i.e. SATA, AHCI, and RAID) without any success either.I've tried to look for SATA controller drivers for my Mobo, to try to load on Installer startup, but failed there too.
I have a Dell Studio XPS running openSUSE 11.2 with dual mirrored disks (using Dell's SATA controller). Does anyone know how I can set up automatic monitoring of the disks so that I will be informed if either fail? I think smartd might be what I need here. Is that correct? I added: /dev/sda -a -d sat -m <my email> /dev/sda -a -d sat -m <my email>
smartd is running, but how do I know that it will report what I need? I also have a client with a Dell PowderEdge SC440 with SAS 5/iR also running openSUSE 11.2. They also require automatic monitoring. There doesn't seem to be a SAS directive for smartd. I notice that the newer release says it does support SAS disk. I upgraded to 5.39. On restart (with DEVICESCAN as the directive) I get the following in /var/log/messages for my SAS RAID disk.
Sep 18 10:47:26 harmony-server smartd: Device: /dev/sdb, Bad IEC (SMART) mode page, err=4, skip device I ran: smartctl -a /dev/sdb and got the result: smartctl 5.39.1 2010-01-28 r3054 [x86_64-unknown-linux-gnu] (openSUSE RPM) Copyright (C) 2002-10 by Bruce Allen, smartmontools
Device: Dell VIRTUAL DISK Version: 1028 Device type: disk Local Time is: Sat Sep 18 11:32:08 2010 JST Device does not support SMART Error Counter logging not supported Device does not support Self Test logging
Is there some other tool/package that does support DELL virtual disks?
I upgraded F14 to F15; However, F15 no longer recognizes my 3 sata disks connected through Marvell controller. The controller is an integrated Marvell chipset 88SE6480. The controller has its own manufacturer driver but it was intended for RHEL 5.4 (mv64xx) and installation of this driver fails to generate mv64xx driver.