Fedora :: What Programs Can Be Used To Test And Find Faulty Memory (RAM, Video Adapters, Cache)
Oct 23, 2009What programs can be used to test and find faulty memory (RAM, Video adapters, cache)?
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Ubuntu :: How To Check Memory If Faulty
May 28, 2011I bought a 2nd hand DDR 1GB memory chipset a few days ago and inserted it in to spare slot on motherboard. However unsure if memory is working properly because bios does not recognise it and neither does Linux but system does appear to run a lot smoother with programs loading faster. If there is a test I can perform to check if memory is working fine or simply return back to shop I bought it? Computer is a DELL Optiplex 170L mini tower system.
View 1 Replies View RelatedServer :: Clear Cache Memory ( RHEL 5.1 ) As It Consumes Almost 100% Physical Memory?
Jan 11, 2010let me know how to clear cache memory ( RHEL 5.1 ) as it consumes almost 100% physical memory.
View 3 Replies View RelatedProgramming :: SHM Memory Counted As Cache Memory With Kernel 2.6.18?
Aug 25, 2010Is that possible that SHM shared memory is counted as cache memory on Linux with kernel 2.6.18?If find it really odd since this memory is not file backed, but I have a piece of code that loads data using shm_open+mmap, and it generates an amount of cache memory in /proc/meminfo that corresponds exactly to the amount of shared memory (I load that data from a file but I am using posix_fadvise(fd,0,0,POSIX_FADV_DONTNEED) to ensure this file is not cached and I made sure that it is working as expected). As far as I know SHM memory was not tagged as cache memory with kernel 2.6.9.If it is the case it is really unfortunate since normally cache memory can be considered to be part of the "available" memory since it can be flushed promptly but this is clearly not the case with SHM memory... Is there an easy way to get the total amount of used SHM memory on a system?
View 4 Replies View RelatedFedora Hardware :: Memory Test Passes But It Breaks Before Finishing?
Jun 24, 2011I've got this really weird problem and I'm not even sure if it is a problem. I recently upgraded the RAM on my Compaq Presario Laptop from 3GB to 4GB by swapping out a 1GB DDR to a 2GB DDR so now it contains two 2GB DDRs. The BIOS shows 4096 MB of memory, Fedora shows 3955MB (Probably after the reduction for the video memory) so that's fine.
But I noticed a very quick flash during boot in between the Compaq Screen and GRUB. It only started coming after the RAM upgrade. I'm not able to make out what exactly is written. It's too fast. Will try with a proper camera at home. In any case, I could make out some large number probably in the order of gigabytes written in bytes. Again, not sure of the exact value.
So I get a little curious about this message and decide to run a memory test. It's working perfectly. Around 74%, it stops and says Memory Test Passed and moves on to check the HDD. I try the same from the BIOS. In the BIOS, it's a progress bar and no percentage value mentioned. Though the BIOS says 4096MB of memory, the progress bar also stops at roughly 75% and says passed. I'm not even sure what to search for on Google though I tried and got no similar results.
why this is happening? Since it's stopping at 75%, I have a feeling that the change in the amount of RAM hasn't been made in some place by the system.
General :: Ubuntu: Failure To Login With Multiple Video Adapters?
May 10, 2010I have a computer with three video cards and six monitors. Works great on Windows. Trying to get it to run Ubuntu 10.4 as well. It loads fine when I have it configured to run on one adapter; detects both screens, runs ok. But I want to turn the other 4 monitors on and run the whole thing as one extended desktop (one session, etc). So I downloaded and installed the newest ATI driver for Linux, which seems to work, kinda. I ran this to set up the screens:
aticonfig --adapter=all --initial -f Now when I boot, Ubuntu seems to turn on all the screens (3 viewports, each with two cloned displays from what I can tell). When I enter my login info OR move the mouse off the main screen, the screens freeze and the kbd/ms become unresponsive.
[Code]...
CentOS 5 Hardware :: Can Find What Wireless Adapters Are Supported?
Jan 2, 2011My recent CENT OS install went very well. However the only thing missing is wireless support for my modest FR-300USB Wireless adapter. Since I do not have the expertise to create a driver I need to know where I can find what wireless adapters are supported.
View 1 Replies View RelatedFedora Hardware :: Skype Video / Microphone Not Working - Test It?
Apr 9, 2011My Internet videos and sounds work, but when i went into call skype test, they said my microphone was not working. I also tried to test my video and that is not working as well. So I believe my microphone/webcam is not installed properly. How do I check if its installed at all? How do I test it?
View 6 Replies View RelatedFedora :: Test Harddrive In Order To Find Bad Blocks?
Aug 15, 2010What software can be used to test harddrive from linux in order to find bad blocks, fix them, etc.
View 14 Replies View RelatedUbuntu :: How To Clean The Cache Memory
Jan 24, 2010I read somewhere that i can clean cache memory with this comand:
Code:
david@lap:~$ sudo echo 3 > /proc/sys/vm/drop_caches
bash: /proc/sys/vm/drop_caches: Permission denied
The problem is that permission is denied as you see...
Debian :: High Memory Usage In Cache?
Mar 12, 2011I've installed my debian sid about one month ago (first xfce, next gnome) but noticed that it's kind of really slow. The upgrades take ages, launching (and using) firefox takes so much time,... In comparaison to my ubuntu, archlinux (on the same computer) or previous installation of debian there is clearly a problem somewhere.Today I tried to do a "top" sorted by mem usage : 3.5% xulrunner-stub, 2.1% dropbox, 1.4% aptitude (doing upgrade), 1.4% clementine,... nothing terriblebut still I've 2.7Gb or RAM used (more than 50%)
$ free -m
total used free shared buffers cached
Mem: 3967 26851282 0 79 1938
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Ubuntu :: How To Clear The System Cache Memory
Feb 15, 2011Ubuntu 10.10
How do I clear the System cache memory.
For the past few days , I am facing problem in opening websites (firefox & Chrome).
I have to restart the laptop and then access the web sites.
General :: Memory Cache Losing Sync With Disk?
Nov 3, 2010(Ubuntu Linux server, 64-bits)I was troubleshooting a problem with a file (~3.0 GB) which I had just downloaded, but it was failing the integrity test, when I discovered something really unusual.First this is the MD5 of the file after download, which didn't match the expected value:
~% md5sum media.iso
5d74facb904cc1765a468354908a8f34 media.iso
Some time passes, nothing should have changed the file during this time, but when I went to check the file again:
~% md5sum media.iso
a5b97c5016afb39bd67ccfc3fa6ca59e media.iso
This was really unexpected. Since I have a lot of RAM, I suspected this was the effect of caching and something was going awry with it. I decided to retry with the whole file from disk, for my surprise:
~% sudo sysctl -w vm.drop_caches=3 # This linux command invalidates
vm.drop_caches = 3 # everything in the memory cache.
~% md5sum media.iso
2992aa6270f6e1de9154730ed3beedc1 media.iso
I redid it and now it seems to stay consistent, although this still isn't the value I was expecting. Certainly, the contents in memory cache were different from the contents on disk.This is the big problem.To fix the download, I created a torrent on the source machine and opened it in the target machine. Five 1MB chunks out of ~3.0GB failed integrity check. I used the torrent to fix these file chunks and how the file integrity is ok.The problem now is to determine where the data got out-of-sync.
I tested the memory with memtest86+, all but the bit fading test. I was expecting to see some failing memory module, but there wasn't anything. Everything is ok.Filesystem is Ext4, over LVM2, over a 3-disk RAID5 array.Ext4 is considered stable, and if data were inconsistent between disks, mdadm would have warned. But there is nothing in the logs. S.M.A.R.T. error logs are clean, the disks are new (have less than 30 days of "power-on-hours").I'm looking for information about any data-loss bugs in my current kernel (2.6.35), but there doesn't seem to be anything, as far as I looked.what else I could check, or where exactly could be the defect/bug?It is a Ubuntu 10.10 64-bit, Core i7 930, 6 GB non-ECC RAM.
Update: I confirmed that the files are being correctly written to the disk, the pages are being altered after they are read from disk, while in memory. I did a lot more memtests (I left it doing bit fade test overnight),and still nothing. All memory modules seem ok.Some more tests:
~% md5sum media.iso
cc8bcf1ce67ff7704eadc2222650c087 media.iso
~% cp media.iso tmp[code]....(direcat is a version of cat that reads with O_DIRECT, that is, bypassing page cache)There is a clear pattern: it always happens to the 2nd byte in a 16-byte alignment. In that byte, almost always the bit 4 (LSB) flips to one, but there was one instance where bit 2 flipped to zero.
Software :: Free - Buff - Cache Memory On Debian
Jun 18, 2010What it's the difference between buff(ered) and cache portions of memory?
Code:
Fedora :: Error: Caching Enabled But No Local Cache Of //var/cache/yum/updates-newkey
Sep 24, 2009I don't understand this error nor do I know how to solve the issue that is causing the error. Anyone care to comment?
Quote:
Error: Caching enabled but no local cache of //var/cache/yum/updates-newkey/filelists.sqlite.bz2 from updates-newkey
I know JohnVV. "Install a supported version of Fedora, like Fedora 11". This is on a box that has all 11 releases of Fedora installed. It's a toy and I like to play around with it.
Fedora :: Play Video From Memory Stick Pro Duo?
Sep 5, 2011I just got a Sony DCR-DVD108. It uses a mini dvd and a memory stick pro duo. It was a gift, and it's the first time through the rodeo for me using this set up. I can get the card recognized when I plug it in using a card reader. I want to record video, and that's where I run into problems. When I insert it, I get something saying that I have still photos, and Shotwell is the default photo software. That would be OK if I had still photos, but like I said, I'm going for video with this set up. I have VLC, but when I tell VLC to "open capture device" under "Media" it gives me a dialog box with (I think) Linux 2 as the capture method (this is going to get a little fuzzy as I have no idea what it's looking for here) and a couple of blanks that need filled in. I may be going about this bass-ackwards, in fact I probably am, but like I said, this is the first time I've messed with a memory stick pro duo. I guess since it's Sony they want me to go out and buy a Play Station to get this to work. I don't think I want to go there. I might be barking up the wrong forest with VLC, but Wikipedia says it will play it.
View 14 Replies View RelatedUbuntu Servers :: Cache Directory And File Structure In Memory?
Aug 11, 2010i am running Ubuntu Lucid x64 as a fileserver that shares its files via SFTP, NFS and Samba. Currently the hard disks are configured to go to standby if they are not needed. This works perfectly as long as no one browses the shares or my HTPC is running: That one repeatedly looks through the shares for new music or movies. In other words my problem is that the disks are spinning up a lot more often than they should have to. Additionally the spin-up time delays the response time while browsing. Since the machine has a lot of unused RAM i want to tell the kernel that it should keep the directory structure in memory. That way the disks would not need to spin up every time someone browses through the directories.
View 2 Replies View RelatedUbuntu :: Natty Clears Memory Cache When Screensaver Launches
May 27, 2011It seems that something is causing the memory cache to be cleared when the screensaver launches. Then when moving the mouse or hitting a key to stop the screensaver it takes forever for the already launched and minimized applications to redisplay. I am using the ubuntu classic desktop.
Now time to rant.
Natty has so many bugs it is impossible to work around them all. This memory issue is one of the worst. The dead zone caused by the static application switcher, and the application switcher plugins for compiz (and probably any override redirect window) is another big one. There is not a single window decorator for compiz that works right. I have encountered two packages with binaries that won't even run (emerald and xpdf). The nvidia drivers seem to have issues (this may be related to this memory clearing issue).
Without a doubt more bugs than any other release of Ubuntu to date. I have worked around most of them by recompiling, and etc., but this is a real pain.
This is all aside from the idiotic switch to unity, when it is clearly not ready for release. The general direction of Ubuntu is really starting to look bad. By the way, what is up with the decision to uglify the desktop with gray scale icons (I know this is an old one, but I haven't really ranted on Ubuntu yet).
Looks like I will have to revert to Maverick.
Fedora Installation :: How Much Video Memory Will Need To Install F15 With Gnome 3
Aug 8, 2011How much video memory will I need to install Fedora 15 with gnome 3.I have an Ati Radeon Hd 4250 with 256 mb of memory.
View 14 Replies View RelatedGeneral :: Crontab To Email When Buffers/cache Memory Reached A Defined Value
Jun 18, 2010I have a Linux server running CentOS with 2GB RAM. I am searching in google and also in this forum but could not find any luck yet. I am searching the way that we can receive notification by system to a specified email when the memory reached a specified value we defined.
Is there any tool or sort of shell script we set via crontab every minute to check that?
General :: Test Memory DIMMs For A Server?
May 16, 2011I need to check if my DIMMs are working fine on my server.
View 4 Replies View RelatedRed Hat / Fedora :: Find Actual Free Memory (RAM)?
May 10, 2011When we have Oracle 10g in RedHat, the free memory goes down soon after bootup of the system and never increases. I learnt from various forums that Linux does cache the disk files for the better performance. And when any application requires memory they get the memory and the caching does not block any memory. We want to capture the free memory available for one the harware planning activity.
1) When we use vmstat command, it gives very less free memory. since it caches large size files, the free memory is very low.
2) We tried free command, but how do we know how much actual free memory is available. i.e. excluding the cache usage
Fedora :: Add/remove Programs Won't Find Sources?
Aug 21, 2010I just installed Fedora 13 today, everything is working including the internet. However, when I try to get more programs it says that it cannot find the sources, and a cache reload will fix it. I wasn't sure at first what that ment, being a begginer, but I think it means going into system-refresh package lists. So I do that,ut it still wont give me the program list. I'm really confused, I come from using windows computers and I don't know what to do now, me be a little clearer, when I click on one of the catagores to find software, nothing comes up but the defalt packages that come with the system. I go into the system-Software menu, and there are no boxes cheked. I thought that this maybe to problem, so I try to cheak the top box labled without parentheses "Fedora 13 - 1386". It tells me to authenticate my action and tells me to type the root password, I do this. Then it shows the screen below. I'm running a 32 bit system,
View 1 Replies View RelatedSoftware :: Monitoring Tools Which Can Listen Disks / Overhead / Cache / Memory / CPU Performance
Jul 13, 2011I'm searching monitoring tools which can listen disks, overhead, cache, memory, cpu performance.Can anybody help me?
View 4 Replies View RelatedHardware :: Test Memory During Centos/RHEL Installation?
Apr 8, 2011I have been battling an issue for a couple of days and I have it down to 2 possibilities. Memory or mobo. A server in the DC is being very sketchy. Sometimes it will boot fine, sometimes it will boot but will not show all the memory, and sometimes it will hang before it even posts. I have replaced just about everything inside the system except for the memory and the mobo.
I would like to test the memory before replacing either because both are a few hundred dollars. The problem is, the memory doesn't log any errors and running a memory test with ubcd doesn't work because it's ecc memory. I thought I remembered hearing that there is a way to run a memory test during a Centos or RHEL installation, but I can't figure out how.
The memory is
DDR2 667 FB-DIMM
and the board is
Tyan S5380
Fedora :: Terminal-based Programs Won't Run Because It Can't Find Libtermcap
May 30, 2010I installed Fedora 12 on a new machine (Intel Core i3) and one of my terminal-based programs won't run because it can't find libtermcap. The specific error is
Quote:
error while loading shared libraries: libtermcap.so.2: cannot open shared object file: No such file or directory
I seem to have this problem every other time I install a new Fedora. I tried a few things with old libtermcap files from other machines, and I tried looking around the YUM repository, but nothing seemed to work.
What's the proper way to get the libtermcap libraries for a Fedora 12 machine on an iCore i3?
Ubuntu :: 10.04 Kernel Panic-not Syncing And Failed Memory Test?
Aug 7, 2011this is a dual boot XP/UBUNTU 10.04. while using XP, the computer rebooted itself. the GRUB's screen appears, but neither the ubuntu nor the XP option works.
Ubuntu gives this error message:
Code:
0.797795 kernel panic-not syncing: vfs: enable to mount root fs on unknown-block (0,0)
XP hangs on a black screen... and that is it (thanks for support windows!) UBUNTU 10.04 live CD hangs when the 5 processing dots appears bellow the ubuntu logo. hangs the same way with the processing bar in UBUNTU 9.04 live CD. memory check (memtest86) is showing thousands of errors right from the start.
Ubuntu :: Computer Booting To System Memory Test In Grub Menu?
Feb 20, 2010I'm very new to Linux but when I first installed it, I downloaded the Start-Up Manager so I could change the boot order. I have a dual boot Windows-Linux, I set the default as Windows. Recently my computer started booting to the system memory test in the grub menu instead of Windows. When I try to open the Start-Up Manager now it asks me for the password as usual and then does not start. How I would change it back to windows for the default? I'm running Ubuntu 9.10.
View 2 Replies View RelatedFedora Servers :: Several Postfix - Test Antivirus Scan Using Eicar Test Virus ?
Apr 8, 2009I have installed Postfix + Amavisd-new, then I am started all services (and configured main.cf and master.cf to use amavis).
The questions are:
1) I am trying to test antivirus scan using eicar test virus
Code:
And the message is successfully delivered to mailbox with mark "CLEAN" in maillog. But I cant see any attachment using
Code:
Where is my mistake?
2) Should I update clam and how I can do it?
3) Is spamassassin enabled by default in amavis (I have started daemon)?
4) Where configuration files of spamassassin is stored?
Ubuntu :: Cant Provide Testing On Memory, CPU, Hard Disk Utilization And Also Stress Test?
Feb 24, 2010is there any performance tool for linux? i av found phoronix but it cant provide testing on memory, CPU, hard disk utilization and also stress test.
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