CentOS 5 Hardware :: 5.5 And IBM X3550 M2 - Slow When We Run Them With 64GB RAM
Mar 14, 2011
we have 3 identical IBM x3550 M2 with identical OS installation. All 3 have 32GB RAM and run Centos 5.5 with Kernel Version 2.6.18-028stab070.14 (virtuouzzo). We now wanted to upgrade the RAM of all 3 Machines with another 32GB RAM.
Maschine 1 runs great with the 64GB RAM but the other 2 get extremly slow when we run them with 64GB RAM. After init it takes about 30 minutes till the OS is up (without errors). Then it takes another 5 minutes to get a shell over SSH. Working with this Maschines is awfully slow. With 32GB RAM everything is fine.
All RAM slots are full, so it is not possible to insert them the wrong way. We have no idea whats wrong with the other 2 x3550 or with CentOS and why 1 Maschine is running fine.
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May 21, 2011
I am having a problem installing SR drivers for my IBM x3550 and x3550 M2 servers that have CentOS 5.x
The files I am using are:
ibm_dd_mptsas_4.22.80.04_rhel5_32-64.tgz
ibm_dd_aacraid_1.1.5.24702_rhel5_32-64.tgz
It seems it is asking for kernel-xen-devel
1. Am I using the correct files?
2. Is it safe to install kernel-xen-devel?
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Jan 18, 2011
I rip the DVDs that I own to my hard disk using a straight-up 1:1 copy, ie to an ISO image. This works great usually, but for this specific DVD that I'm presently trying to rip, I'm being told that the DVD is literally 64GB in size. It's definitely not a BluRay disc, and I don't even have a BluRay drive, so that possibility is ruled out.
I'm not having any problems playing back the DVD file in VLC. I'm running Ubuntu 10.04 64bit. How on earth could it be a 64GB DVD?!? Isn't the max capacity of a DVD around 8 gigabytes? I don't even think that BluRay discs hold 64GB of data!
[Code]...
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Apr 14, 2010
I just acquired a shiny new 64Gb iPod Touch and for the life of me I can't get it working in either Amarok or Banshee at all and it doesn't automatically mount as it is supposed to on 10.04 Beta 1 or 2
lsusb shows it's there and after following this thread I could get it mounted and see the directory structure.
[URL]
But it doesn't show up in Banshee or Amarok at all.
Is it just because it's new and might have a quirk? Or could it be something simple I have missed? I'm not a total noob but still learning
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Sep 9, 2009
I have an MSI K9A2 Platinum mobo, which has a 10/100/1000 Fast Ethernet Realtek 8111B built-in, a D-Link DIR-655 Router and a DSL modem. Compared to Windows Visya and other Linux distros ( Fedora 11, Suse 11.1, Mandriva 2009.1 ) access to the internet is much slower. It seems there is a noticeable delay when running CentOS 5.3. before internet access kicks in each time I am surfing the web or updating my system.
Is there any way I can speed things up, or determine why CentOS 5.3 seems much slower ?
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Jul 14, 2010
Anyone know why my fresh installation of centOS server is so slow? Seems like it takes over a minute to execute a command, im not doing anything complicated either. Secondly, how come at times when I type reboot the machine starts to beep, one long loud annoying beep.
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Mar 1, 2011
My box is centos 5.5 x86, and it is got slow nowadays. The "top" is as attached.
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Jun 10, 2009
When I login to ssh enter username then it takes quite a bit of time before password prompt comes up.
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Feb 11, 2010
in my office I've setup a centos server which uses no GUI only the console with apache & mysql for testing purpose, notice that I haven't setup any vhost or any mysql db yet, so the load is 0.00 The strange thing that suddenly one day I tried to login to this "server" from my windows pc (in the next room) via putty , and since that day the "server" is very very slow. What do i mean? when I try to login with SSH it makes 15 seconds or more to ask me about login, and then about password (like it happens in a server with massive load). then when I type the command in the konsole it always delays between letters.
I run top -c and everything is dead (0.00) so there is no load. even If I ping -t localip the machine , after 3-4 pings I get "Request timed out". so I think something is wrong with the local network. If I get connected physicaly in the "server" and start pinging my windows pc it works great, everything is going fast, the konsole is fast (as it should be) and if I ping any other servers it also goes withoute a problem. The I think its not a problem with the "servers" network connection.
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Mar 1, 2011
I am not an expert and have only been managing my server not too long. My server is running kind of slow so someone suggested running the 'top' command via shell, and I found a few things using major resources, but I don't know what they are or how to fix them. can someone suggest some things.
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Apr 28, 2010
I am using CentOS 5, I have recently installed it on my Dell LATITUDE laptop but the resolution was 800x600. I've tried to put it on 1680x1050 and it worked out well I guess but the graphics had become very slow. For example I have to wait 5 to 6 seconds to scroll from page to page in a pdf file. Minimizing a window takes also a lot of time. I have a NVIDIA card in my PC.
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Mar 4, 2009
SSH access works fine from a LAN computer, but anything over the internet is extremely slow or times out. We're talking a good 1-2 minutes just to get the login prompt!This is a new installation, I switched from Fedora to CentOS. Previously, SSH from off-network worked perfectly fine with Fedora.What could it be? All other network services on this machine are working properly and at normal speeds, it's just SSH that is not willing to cooperate.
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Apr 14, 2009
I am having a problem with slow data transfers with both Samba and scp. I have gigabit NIC's on both all three machines that I am transferring to and from, connected to a gigabit switch. My data transfers under both smb and scp average around 21 MBit/s, (I am using nload to monitor transfer speeds).The machines are configured as follows,1) desktop
AMD Athlon 64 X2 6000+
6 gig Corsair memory
Realtek RTL8168C(P) gigabit NIC (on board)
[code]....
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Jul 19, 2009
I'm not sure why, but over the last couple of days when I browse the web with my Centos 5.3 machine running firefox 3.0.5, it takes a very long time to load web pages. Loading the app itself is pretty quick, and I have not issues with system resources (it's an HP Proliant ML115 server, with dual opteron processors & 3Gb RAM). Looking at CPU & disk useage there's nothing out of the ordinary:
top - 18:59:19 up 1 day, 22:54, 2 users, load average: 0.28, 0.90, 1.20
Tasks: 162 total, 1 running, 161 sleeping, 0 stopped, 0 zombie
Cpu(s): 2.2%us, 0.3%sy, 0.0%ni, 96.0%id, 1.5%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 3090912k total, 2278624k used, 812288k free, 194520k buffers
Swap: 2031608k total, 0k used, 2031608k free, 1241912k cached
[Code]...
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Aug 1, 2009
I've just installed my first OpenLdap + TLS + Samba + Webmin box.Everything seems to work but when i try to open the Ldap User and group module from Webmin, it takes about 3 minutes but it works.When i use $ getent passwd or$ getent group.to see if everything works okay, it also takes ages but does not show my ldap users...Here's my spec
$ cat /proc/version
Quote:Linux version 2.6.18-128.2.1.el5 (mockbuild@builder10.centos.org) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)) #1 SMP Tue Jul 14 06:36:37 EDT 2009
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Oct 31, 2009
Ever since the upgrade to CentOS 5.4 the system boots extremely slow and x-windows is virtually unusable unless the machine is connected to a network. It hangs at netstat, cups, httpd during the boot process. I utilize the operating system to create Asterisk servers and sometimes they are not connected to a network ever.
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Dec 23, 2009
I am using CentOS and sending mail through php mail function. It is taking too much time to send a mail.
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Feb 10, 2010
1) I have installed centos 5.2 on my desktop computer, it was very slow i couldn't even copy from pendrive to harddisk, if i do mouse pointer stuck and move no smoothness in working in centos...! can't work ! (i have installed minimal installation and also turned off many service using chkconfig command) specification of my computer :---- gigabyte 8 series mobo and pentium IV 2.6 GHZ, 1.2GB Ram, and 6200 GeForce nVidia graphic card ----
2) After installation ntfs-3g it won't work to access harddisk.
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Feb 17, 2010
have the latest Vbox installed on CentOS 5.4, i have a XP home VM & Server 2003 VM set up. Im using the T1000 Emulated network driver and only getting 100-150mbps throughput when checked with QCheck. I tried the virtio-net (paravirtualized) drivers and only getting 50-90mbps using it, which i found odd. Is there any way i can increase the througput to my VMs? I seen some people on forums talking about getting 300-350mbps, but im no where close to that. When i check throughput to the host (CentOS) i get at least 800 mbps.
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Aug 25, 2010
I just installed CentOS on my Compaq desktop pc with HP laserjet 2100 printer on parallel port.However it takes an extremely long time to print.
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Jan 17, 2011
we got a dell nf600 network storage server which functions as headnode for our little computing-grid and network storage system
i did a normal install of centos 5.4, upgraded to 5.5 and so far there haven't been any problems with one exception:there are 2 harddisk configurations present on the box:
- a raid system where i store all the data with 4TB, mirrored
- a harddrive where the system files are stored
the network access happens via samba and nfs and is fast enough, but when i want to copy something from the raid to the single harddrive or vice-versa, or make some bigger file operations on the raid, the system slows down VERY much and is not responsive at all that there should be some extra-configuration for the filesystem/raid controller/... but i don't know where to start looking i would appreciate it very much if someone could help me further - and i will ofc provide all the configuration files you need for that (i just don't know which ones to post here in the first place)i'm not too lazy to read through some manuals, if you know a good one for setting up a fileserver in centos (with info how to tweak performance)
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Jul 6, 2009
When running Firefox, page loading is very slow (e.g. taking nearly a minute for a ..... video to start; even gmail is slow). This is in contrast with my performance when using, e.g. linuxdcpp (file sharing), where I get speeds over 300kbps. Here is some relevant information:
[root@cgwatson ~]$ uname -rmi
2.6.18-128.el5 x86_64 x86_64
[root@cgwatson ~]$ rpm -q centos-release
centos-release-5-3.el5.centos.1[code].....
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Mar 28, 2010
My server is really slow. When I did a top -c or ps aux, below shows up. Shouldn't there be only one? Shall I kill all those processes and leave only one?
3135 nobody 15 0 15900 5232 1860 S 0.0 0.1 0:00.17 /usr/local/apache/bin/httpd -k restart -DSSL
3173 nobody 16 0 15900 5244 1848 S 0.0 0.1 0:00.05 /usr/local/apache/bin/httpd -k restart -DSSL
3174 nobody 15 0 15900 5232 1860 S 0.0 0.1 0:00.15 /usr/local/apache/bin/httpd -k restart -DSSL
5153 nobody 15 0 15900 5228 1860 S 0.0 0.1 0:00.04 /usr/local/apache/bin/httpd -k restart -DSSL
7598 nobody 16 0 15900 5228 1872 S 0.0 0.1 0:00.20 /usr/local/apache/bin/httpd -k restart -DSSL .....
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Mar 30, 2010
I ran into this today accidentally turned on networkmanager and it took it upon itself to rewrite some things and proceeded to make any DNS lookups on my server Especially those reverse DNS for SSH and SFTP take so long they would just time out instead of completing.. Disabling networkmanager did not undo the damage either. Short fix, Erase your resolv.conf file and add 2 lines to it as so, your nameservers!
nameserver xxx.xxx.xxx.xxx
nameserver yyy.yyy.yyy.yyy
save, and run the following commands
service network restart
service httpd restart
service sshd restart
Mine had a search line added by networkmanager and some others, when i reverted it back to as above, almost instantly after restarting the services the systems lookups were once again, lightning fast. DNS lookups were taking upwards of 20 seconds for unknown reasons after this happenned
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Aug 7, 2010
I changed the host name on this CentOS 5.5 machine but whenever I reboot the machine the startup pauses at the point of starting sendmail for several minutes and then eventually moves on. What could be causing this?
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Jan 12, 2010
New CentOS 5.4 system working fine. Sys admins came in and copied the hosts file from one of the servers down to my desktop and ever sincethen machine has been slow (progs take 10-20seconds to load). RunningGnome. Luckily I saved the old hosts file and copied it back and all is now well. But I'd like to understand why, particularly as I will need to change myhostname in the future.
As configured:
/etc/hosts (yes my hostname is "dummyName" that I will need to change later)
127.0.0.1 dummyName localhost.localdomain localhost
[code]....
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Aug 31, 2010
I am using MySQL 5.0.77 Version rpm on CentOS 5 Red Hat Linux. I want to install micro second slow query log patch on this MySQL S/W version.As I found the slow query micro second patch on percona site i.e. [URL]step by step to install above mentioned patch with rpm based MySQL installation? Do we need MySQL source files to apply patch ?
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Nov 16, 2010
I have CentOS 5.5 x86_64 with Apache, php and mysql.
I have just installed OTRS (helpdesk - trouble ticket system) on that server and no users.
This system works with perl, apache and mysql.
I notice that is slow to respond and at times unresponsive the apache welcome page. code...
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May 22, 2011
I have a problem with speed of read/write operations (3Mb/s max)
Hardware - HP DL160.
CentOS 5.5 working on VMWare ESXi4.1.
R/W operations on CentOS 5.5 without ESXi - 60Mb/s
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Jun 28, 2010
I am new to Centos and linux in general. I have just got myself a Dell 1950 server with 2x 1T SATA2 hard disks in it. now the server comes with a PERC5i Raid card with 512Mb. Well I put these in raid 0 and the raid card initilzed the disks to 128 writeback and read ahead. When I loaded centos it did not recognize the dell layout so therefore wanted to initalize it again, so I done this as it wanted. Now I created a 80gb boot and o/s partition and a 100gb swap the rest was created into LVM space to run solus vmwear. But I found the raid 0 to be getting extreamly slow read and write speeds.
Example same disks
Desktop PC max 214mb/s windows vista 64
Server with centos 104mb/s
Now I am not sure but I am told that I need to align the o/s with the raid card settings but I have no idea how to do this. How to do this in plain easy step by step instructions. I mean how to calculate it, how to format the disk this way, and what files to edit where if needed. I have spent hours trying to figure out why my raid 0 is slower than a single disk.
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