Centos5 Use Less Memory Than 4

May 18, 2008

centOS5 don't come with mass install software?

Any perl modules and rpm sources can compile on 64bits version?

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Less Ram With Centos5

Jul 6, 2007

we got a new box with 4GB of ram but seem that Centos 5 show only 3Gb why?

root [/]# free -m
total used free shared buffers cached
Mem: 3290 2757 533 0 228 968
-/+ buffers/cache: 1560 1729
Swap: 8001 0 8000

root@mikonos [/]# uname -a
Linux 2.6.18-8.1.6.el5 #1 SMP Thu Jun 14 17:46:09 EDT 2007 i686 i686 i386 GNU/Linux

the same server with Centos 4 report 4GB

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CentOS5 - HDD Partition

May 14, 2008

I'm trying to install CentOS5. Although the default partition should work fine for me, but I would like to create my own partition for /var, /usr/, /tmp, /swap, etc. Can you recommend me a good partion including the size. My server has 4GB RAM and 500GB SATA2 HDD. I don't use much space of HDD.

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Libxcrypt On CentOS5

Jan 26, 2008

Trying to get something sorted on a VPS that I want, but when I try to run a script I get the following error:

cp: cannot stat `/lib/libxcrypt.so.1': No such file or directory

which is easy enough for me to understand however, I cannot find what package I need to install to provide the file.

I have searched for libxcrypt* on the box to see if its hidden elsewhere but to no avail.

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Install Xen Centos5

Nov 26, 2007

i have installed xen kernel et libraries, i try to install a guest os with virt-install, and when i hit the network installation it doesn't seam to work. The installation doesn't go further.

Anyone has experience with xen ? I'm a good unix admin but i havn't worked alot with xen yet. I can make it work on other hardware but it seams that for some reason it doesn't work on my dedicated server.

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CentOS5 And CPanel :: Subdirectories

Nov 18, 2008

I have a VPS with CentOS5 and CPanel...for some reason if I went to that URL it would show the website for the second account created in WHM...so I modified the httpd.conf and added the domain, but for some reason subdirectories won't work on it.

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Unable To Connect Via SSH With Centos5 X64

May 27, 2007

I have been struggling with a couple of new servers that we want to run Centos 5 on. For a second assume that is our desire so going back to 4.x isn't an option yet.

Now while I mention Centos 5, the problem seems to be with PAM and x64.

When trying to login to the server via ssh, the login succeds but then immediately kicks the user out. I have tried this with root and another user created. I have set the UsePam option to no to try to resolve this in sshd_config.

On the H-Sphere forum I found this reference:

[url]

" if i try to connect with ssh and i enter the right password i get an error and ssh closes the connection. The answer already was in the ticket you opened:

Quote:

That is known bug dealt with PAM authentication.

The bug was fixed for i386 systems long time ago. But it was not fixed for x86_64 architecture.

We build FreeVPS kernel new version 1.5-13.1 for x86_64 architecture to fix the problem.
We also installed the kernel into the box IP 64.71.227.16.

Please reboot the box with the new FreeVPS kernel version: 2.6.9-freevps-1.5-13.1smp.
Let us know the result."

Does anyone know how to resolve this? A reinstall of PAM was attempted by a well known sysadmin here but to no avail.

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Steps To Install FFMPEG On Centos5

May 5, 2009

Can someone please provide me steps to install FFMPEG on centos5.

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CentOS5: VI Not Showing Files With Color

May 2, 2007

I tried CentOS5 on my new server. Having CentOS 4 on all other server I never faced this issue. I always get server with vim -minimal installed and I install vim enhanced and common to get text color highlighting.

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Centos5 Cant Mkdir Numeric Directories

Dec 30, 2007

We have a weird issue on one of our centos 5 servers, running the 2.6.18-53.1.4.el5 kernel

for some reason we cant mkdir any directories that are numerically named

ie mkdir 5789 doesnt work

alpha and alpha numeric work fine... ie mkdir ab567a

Quote:

[root@]# mkdir 6
mkdir: cannot create directory `6': No such file or directory
[root@]# mkdir 6ab
[root@]#

Someone suggested the adore-ng rootkit was to blame but we have run ossec root check, rkhunter and chkrootkit and even run clamav over the drives and cant find anything nasty

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CentOS5 VPS - Yum Barely Working. How To Exclude A Mirror/Mirroring For YUM?

Apr 2, 2009

On a CentOS5 VPS I have access to "yum update" barely working due to the base mirror "styx.biochem.wfubmc.edu" being tremendously slow.

I'm trying to find out how to disable that mirror possibly via a mirror exclude setting in yum.conf or some other way. I've been searching but I've not found any documentation on this so hopefully somebody out there will know how to make this change.

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Howto Install PHP/Java Bridge In Server Centos5.2

May 10, 2009

i have server
system centos5.2
Apache 2.2.11
PHP 5.2.9

how can install HP/Java Bridge?

in this link he said install Apache Tomcat
but i have Apache 2
[url]

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Supermicro H8DA8 Kernel Issues On CentOS5 | HyperVM

Oct 24, 2008

I just colocated a 2U supermicro server for a VPS node and experiencing troubles getting HyperVM (ovz) and centos5 to run on it. First of all, the h/w specs.:

2x dual-core opteron 280
12GB DDR400 ECC Reg. RAM
Supermicro H8DA8 mainboard
Adaptec 2120S RAID card with BBU, writecache on
6x73GB SCSI as RAID5+hotspare

All firmware updated

I asked DC staff to load centos5 x64. They installed 5.1 and it was running fine.

However, they said centos 5.2 didn't install. So, I ran a yum update and it updated to 5.2 including kernel.

After the update and issuing a reboot, the box did not come back online and on consoling it, they said error messages scroll too fast to be read after the centos splash screen and it loops on like that. Only the 5.1 kernel 2.6.18-53.el5 seem to boot fine though.

I booted with the old kernel and installed hyprvm; set grub to boot using the ovz kernel and rebooted. Sadly, the same errors and server non-responsive.

Does anyone have any clue regarding this issue? Should I try my luck with centos4.7 x64 instead?

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How Do I Configure Dedicated IP's On Virtual Machines Running On A CentOS5 Host

May 24, 2009

How do I configure dedicated IP's on Virtual Machines running on a CentOS5 Host?

I installed VMWare Server 2 almost without a problem using no GUI, I now have the web interface for the VMWS2 and any machine I create and run on it seems to do so without a problem.

The thing is, I can't connect or know how to configure this virtual network so I end up using 2 dedicated IPs on the Virtual Machine.

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Cpanel VPS - Plenty Of Free Memory, But 'committed' Memory Exceeds VPS RAM

Jun 12, 2009

I have a VPS. And have had an issue both when it was 1Gig and now I recently downgraded it to 768m, because I am moving some sites to a dedicated.

However, the part I am having trouble grasping is that when I look at graphs from Munin, it will typically always show 200-400MB free memory (and free -m and top agrees with munin), but Munin shows 'committed' memory that is above the total Ram on the VPS and once the 'committed' ram exceeds the VPS limit, processes start failing.

So, why is 'committed' memory exceeding the RAM on my VPS, when Munin, free -m and top all show there is free memory available?

Code:
root@server [~]# free -m
total used free shared buffers cached
Mem: 768 449 318 0 0 0
-/+ buffers/cache: 449 318
Swap: 0 0 0
Here's a graph that munin produces that shows the 'committed' memory exceeding the total memory.
[url]

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Memory Usage :: Put More Content Into Memory?

Jul 16, 2009

I just got a new server Dual E5520 with 6GB RAM, SAS 15k rpm raid10. It's running well. However, the memory usage is just around 2.5GB, even when I have more traffic. Here is the kernel info

Quote:

# uname -a
Linux server2.[url]2.6.18-128.1.10.el5 #1 SMP Thu May 7 10:35:59 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

Any idea that we can put more content into memory?

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I'm Missing 7 GB Of Ram: Installed Physical Memory 8 GB / Total Physical Memory 1 GB

Apr 4, 2009

I just ordered a server from serverbeach that should have come with 2 GB but I see that this one comes with 8 GB

Unfortunately, I seem to be missing 7 GB of ram.
Installed Physical Memory: 8 GB
Total Physical Memory: 1 GB

Windows 2008 Server Web 32-bit

Now, being a 32-bit system, I should see 3-4 GB of ram right?

Any idea why only 1 GB is available for the OS?

[url]

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512MB Memory VPS... Out Of Memory Already

Oct 1, 2009

I have a 512mb DV server with Mediatemple, which I am running 24 (ish) domains off (most of them static websites) and a teamspeak server. I would say MAX theres 10 users online at a time)

Now, I know its running out of memory because i get frequent QoS Alerts in plesk (kmemsize is apparently the memory size):

Oct 01, 2009 11:52:57 AMBlack zonekmemsize

I have attached my results (when I did top).

My questions are:

1. Should I be expecting to be out of memory running what I am?

2. Is there a way to see the problem domains (memory wise)?

3. Are there any ways I can reduce the memory? (I have followed this already:
[url]

4. Where is the memory usage coming from (I am finding it very hard to understand TOP)

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VPS Memory

Jun 19, 2007

I am hoping someone with experience of these things can comment on memory usage on my VPS partition. The master server on which my partition sits seems to be running at full memory usage and I'm getting lots of fork and mutex errors in apache causing apache to crash several times a day.

I'm running Invision Power Board on there with an average of 100 users in the last 15 mins during most of the day.

oomguarpages and privmpages are reported in 4KB blocks.

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More CPU Or RAM Memory?

Jun 18, 2009

Hello everyone.i run LAMP on a dedicated server at theplanet.I have a small vbulletin forum.

I m planning to move to a new server.Just a quick question.for my new hardware,do i give more emphasis to ram or cpu...i will be getting 2 gb at the minimum.

SO,is LAMP dependant more on cpu resources or ram?

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Xen Using More Memory

Jun 25, 2009

I previuosly have a forum hosted on a VPS with a 512 MB RAM (OpenVZ) and at that time it was only using 300MB of ram during peak time but the server was always down due to harware failures so I move to a new host this time Using Xen with a 768 RAM now it is using all the RAM available which is double the ram that it uses before. Is it really normal for a XEN vps to consume more memory than on a VPS using OpenVZ?

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Memory And Cpu

May 4, 2008

today I recieved an email from my server saying:

Drive Space Critical on server
Drive Critical: /dev/simfs (/) is 91% full

When i check the whm I see

cpsrvdfailed
exim (exim-4.68-1_cpanel_maildir)up
ftpdup
httpd (2.2.8 (Unix))up
imapup
mysql (4.1.22-standard)up
named (9.3.3rc2)up
popup
Server Load0.11 (2 cpus)
Memory Used38 %
Swap Used0.00 %
Disk /dev/simfs (/) 91 %

what i dont understand is where did it go. I dont really have much traffic and nothing was uploaded or downloaded. I dont have any automatic backups enabled. How do I get it back to the normal 40%

I do notice i have alot of cpu usage
Top Process%CPU 77.4gzip
Top Process%CPU 76.2gzip
Top Process%CPU 75.9gzip

Which is also confussing to me because I am the only user. I didnt do any backups didnt have any major traffic. And my disk space "memory used" didnt change.

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VPS And Min Memory

May 5, 2008

How much memory would I need to run a couple of websites, with gallery,postgresql,wordpress,dotproject,spamassassin on top of usual apache, mysql, php etc?

Most of the cheap VPS starts from 196MB or 256MB. 512MB upgrades are expensive :p

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How Much Memory Is Best

Aug 8, 2008

How much extra memory do I need on a VPs to be safe ?

Do I need something like 20% more of what I actually use just to be safe?

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How Can I Use More Memory

Mar 12, 2008

I am trying to optimize my VPS setup and can't seem to get it to use all of the memory that I have. I have problems even getting it to use half of it. What kind of changes can I make so that it uses more memory while reducing load? My recent MySQL and Apache conf optimizations I have read about here and other sites have sent my loads above 1, but the memory usage is staying the same.

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Xen Memory Used

Nov 27, 2008

I've a question with XEN VPS. I rented vps with sweden provider and its 20 GB HD and 256MB memory. The setup isnt bad, done within 1 day. I check inside the vps and its XEN VPS.

I tried "top" command and wow, I am supprised !! here what I saw
Mem: 262320k total, 208708k used, 53612k free, 54680k buffers
isnt it funny ? 50MB++ left(not yet run anything, no panel running too). is it normal ?

I have other vps running inside virtuozzo, and got 192 MB inside. even its running so many process inside(about 15) that takes about 5-10MB each, its still have more left than XEN.

Mem: 196608k total, 82972k used, 113636k free, 0k buffers
100MB++ left,

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Xen Using Too Much Memory

Jun 4, 2008

I noticed that, VPS with Xen technology, are using up far more memory than others?

Lets say, I usually use about 300mb of ram in a VPS with openvz, but VPS with xen, with the same usage, is using about 820mb of ram.

Even without running anything...after a fresh install of centos 5, with only few OS processes, its using around 170mb of ram already.

Is this so with Xen? The expected ram usage with Xen? Or am I missing something?

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VPS Memory

Sep 20, 2007

I have this 512MB memory VPS plan from fdcservers.net and it kept running out of memory.

The memory went up and down like roller coaster every seconds although I switched off httpd. Anyone can tell me what RAM do they assign to my VPS? Here's the beancounter results: [Please find the result in the attachment] Dont know why webhostingtalk mess up the spaces between each texts.

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Memory Used On VPS

Apr 20, 2007

We are running into yellow status often at our new VPS. We have been with the web host for almost 1 year and recently got moved to a new VPS. WHM often show a yellow status for Memory Used (80% or so). As per the web host, WHM shows RAM for the entire server and not just our VPS. So how can we determine how much RAM we are using so? And to determine if we are using more RAM than we should or if others on the server are the culprit?

never got this yellow status on the old VPS.

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VPS Memory

Oct 5, 2007

if someone here could offer their advice/expertise in this problem. I have a 256MB CPanel VPS. When Apache is restarted, memory is around 180MB which is perfect

However, before long, memory usage is at 240MB. Looking at top processes, this is the top 5 i get...

PID USER PR NI VERT RES SHR S %CPU %MEM TIME+ COMMAND
29833 nobody 15 0 27616 14m 3776 S 1 1.4 0:30.32 httpd
26432 nobody 15 0 29104 16m 3836 S 1 1.6 0:24.80 httpd
28398 nobody 15 0 26996 14m 3776 S 0 1.4 0:28.70 httpd
28645 nobody 15 0 31324 17m 3776 S 0 1.7 0:25.93 httpd
31981 nobody 15 0 32232 17m 3776 S 0 1.7 0:38.69 httpd

Anybody able to offer any advice? I see that all processes are httpd, is lighthttpd or lightspeed a solution?

The main site serves up php content (No mySQL) and a few images. It also has a LOT of image requests which are redirected by photobucket via .htaccess.

The secondary site on the server (not yet launched) is going to be an arcade site running gamescript. I have been hesitant to release this site untill these memory issues are sorted.

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Memory Used

May 3, 2007

My VPS Service Status showing
Memory Used 70.4 %

is that normal? how I can less memory used.
----------------------------------------------
Second I just got following email from system

"The following list of files have FAILED the md5sum comparision test. This means that the file has been changed in some way. This could be a result of an OS update or application upgrade. If the change is unexpected it should be investigated:

/usr/bin/sa-learn: FAILED
/usr/bin/sa-update: FAILED
/usr/bin/spamassassin: FAILED
/usr/bin/spamc: FAILED
/usr/bin/spamd: FAILED"

any issue with server?

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