Fedora :: /dev/shm - 224 Mbyte Ramdisk That Is Consuming 224 Mbytes Of System Memory Whether Or Not Use It
Dec 5, 2009
I just noticed this in my "df" output:
There's an entry in /etc/fstab which mounts this automatically. If I interpret that correctly, that's a 224 mbyte ramdisk that is consuming 224 mbytes of system memory whether or not I use it. Is that correct? If so, will anything break if I unmount it and delete it from /etc/fstab? Do programs typically depend on it? I'd like to reclaim the system memory (low DRAM machine) for other uses.
There is squid 3.1.8 on a Fedora 12 server with 2 GB of RAM. It is used for sharing the Internet for approximatively 80 PC's. The problem is that it is really a memory hog, when enabling delay pools. I am using the following configuration for the memory pools:
There are moments when the squid process uses approximatively all the RAM and goes into swapping. After that I restart it, it goes well for a while and again eats up all the memory. On the Internet it says that Squid uses a lot of memory, but should it use 2 GB of memory, even if all 80 people are online at the same time?
I've just upgraded to 10.04. I love it. I've been running dark themes for a long time and this upgrade merged seamlessly with my setup.There is a nasty problem that I've noticed on only my desktop box (laptop is fine, also upgraded to 10.04). The dbus-daemon is hogging approximately 50% of my cpu cycles. Is there a way to limit this? I'm watching this via the System Monitor and the % CPU. My laptop registers its dbus-daemon % CPU as 0.
I have 3.5GB of usable RAM as reported by System Monitor. Now after a couple of hours, System Monitor shows that around 52% of my RAM is being consumed. Switching to Processes (I have All Processes selected), I see firefox-bin consuming around 200-250MB of RAM while Xorg consumes around 100-140MB. The rest adds up to another 200MB consumed.
So it doesn't add up. Yeah, I can grab another RAM block and be done with it (giving a projected total usable RAM of 7.0GB, I have another slot). I just want to know where the rest of the consumed RAM is.
how could i mount the whole system into the ramdisk?I follow the article "http://www.linuxquestions.org/questions/red-hat-31/building-a-diskless-redhat-enterprise-linux-cluster-765393/",and it works.when i use the "df -h" on the diskless client .I find many system driectory is mountted from image_server.when i stop the connection between img_server and diskless client,the diskless client stop working. my question is how can i mount the whole system into ramdisk.
I'd like to learn it. So I installed lenny & grub2, after that win7, reconfigured grub2, upgraded to squeeze. All is fine, but I cant start working in Debian as I can work only in Windows. So I decided to use qemu to emulate win7 booting. I have sda1, sda2 for squeeze; sda3 and sda4 for win7. If I try "qemu /dev/sda3" I get disk read error. If I try "qemu /dev/sda" I have grub 2 boot screen and when continue booting win7 I get "Ramdisk device creation failed due to insufficient memory" (as screen on [UR:]). I tried to use m -1024 parameter and got screen with "Windows load files" and reboot to grub2 screen/
I have built a kernel with a ramdisk(ramdisk.image.gz) included. Also in the kernel command line I specified root=/dev/ram0. I am trying to use this ramdisk to load a loopback file as the root filesystem off a fat partition. This is /sbin/init from the ramdisk.
#!/bin/sh mount -n -t msdos /dev/mmcblk0p1 /mnt losetup /dev/loop0 /mnt/linux/linuxdsk.img mount -t ext2 /dev/loop0 /mnt2
The problem is both umount and blockdev report "device is busy". I want to free up this RAM any suggestions?
I just installed Fedora 13 onto a "new" (to me) box, and everything seems mostly fine, except that I only seem to be able to use about 900.2 MiB of 991.4 MiB of RAM memory, according to System Monitor. I haven't set up a swap partition yet, so the problem became very, very, very obvious. When I get to about 890 MiB usage, everything goes very quickly downhill, locking up, etc. The peak I saw was 900.2 MiB. What's going on? Does this have anything to do with the system being 64-bit? Might the memory be bad?
I have worked in linux for a long time but never managed the system until I got my own server, which is running Fedora 14. I have a 3 TB Drive and apparently can only handle 2 TB. At least the Disk Analyzer is telling me that 2TB is 100% max capacity. Also viewing disk analyzer, I am only using 50GB of my 2TB but I am out of memory in the Root file system. If I run df -h, I get he following:
Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_dev1-lv_root 50G 40G 7.2G 85% /
I had Fedora 13 64 bit before which was correctly reporting memory as 4GB. After I wiped off Fedora 13 and did a fresh install of Fedora 15 32 bit, the memory is reported as 3.2 GB in the system Info and also in free -mt command code...
Where is 600MB memory gone missing? I checked the BIOS setting and it correctly says total memory is 4GB.
The hardware is exactly same and I did not change anything.
I have been using for over a year now, my 64-bit computer first with Fedora 8 and now with Fedora 10 with 2Gb of RAM just fine. Today I purchased an extra 2Gb for the system and upon installation from the GRUB screen Fedora 10 simply won't boot. It does boot with 3Gb, and it doesn't matter which stick I use for the 3Gb configuration, or what slot do I put the sticks into the motherboard, however if I place the four sticks, F10 simply won't boot. Should I pass a command line argument tot he kernel? If so, which?
i have a RAM of 1 Gb & swap of 1Gb with fedora11 installed, initially in RAM programme memory uses around 300 Mb & cache uses 600-700 Mb , but after some time it starts using swap memory though my programme memory is still around 300 mb, it keeps on increasing swap memory as a result my system keeps on slowing down & finally when swap memory is 100% system almost stops responding but programme memory is still around 300mb.
My server is keep on hanging So I have rebooted several times in the last couple of weeks, the system is eating more memory and the usage is keep on increasing and at particular time it became saturated and my server hungs. I could not find which process is eating more memory. I have used the below commands to check if any process is eating more memory but no luck. No such process are using high memory.
So after deciding to upgrade the existing fedora install on my laptop from 11 to 12, I decided to use the preupgrade method. After grappling with the boot space issue by clearing out an old kernel that was deemed safe to remove by the python script on the preconfig wiki page and then using tune2fs, I left the computer to do it's thing, periodically checking back on it. I come back to my computer, and after an apparent restart I see this message spat out at me:
kernel panic - not syncing : VFS : unable to mount root fs on unknown block (0,0) I need this laptop up and running for tomorrow and I would appreciate any help given. I have a Fedora 11 live CD running on the laptop and there seems to be an extra 210 filesystem present with the folders efi, grub, lost+found in there, as well as some config files, elf-memtest86+-400, what seems to be .img file amongst other things. If necessary, I can provide a screenshot.
Is there a system admin tool for RHEL on montioring and logging system memory used and released that can dump to a log file?I'm having an issue with memory not being released when an application is closed. I need to have a tool monitor and log so I can troubleshoot to verify that it's an application not the OS.
I am looking to buy some memory for my netbook. Currently I have 1 GB of DDR3 memory. However, the specification says that 2 GB of memory is the max. However, when I do the following it says that 4GB is the max:
I was following this tutorial on How install the rpmfusion nvidia drivers in Fedora 13Here's the tutorial:Quote:Originally Posted by leigh123linuxF13 Howto for the rpmfusion nvidia drivers This is a Three-Step Process. If you don't follow all three steps, your install will fail!1. Install the nvidia driver. ( if you have 4Gb of RAM or more you will probably have a PAE kernel [32bit only] so follow the PAE part )For GeForce 6, 7, 8, 9, 200 & 300 series cards
Code: su rpm -Uvh http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-
I have Mythbuntu 10.04 installed on an exclusive HTPC and working great... until tonight. After letting the system update some packages (161 packages if I remember right), I suddenly have an issue where the graphical system won't start. After researching I found three error messages that might be causing that.
1. At the start of splash screen I see "UUID=xxxxxxxCD7 not ready yet or not present" I checked in /etc/fstab and found that this is the swap partition. I don't remember seeing this before so this could be the culprit.
2. I'm not at the computer in question right now but I saw a Plymouth error about "mountall" and then the message "plymouth command failed". Not sure if this could be the main error.
3. after a while (usually ca. 1-2 min) I receive thousands of errors of the kind "out of memory"... "kill process XXXX" (process vary wildly e.g. dbus-daemon, mysql, etc)... "process killed"..."respawning"
After error 3, I'm not able to switch to graphical console (ctrl-alt-F7). If I was in the graphical console at this moment, I simply can't switch to the CLI console. I'm always afraid of updating my system since I've seen lots of things breaking afterwards (usually the proprietary graphic drivers) but this is really strange.
This doesn't happen all the time, but right now I can't kill skype!I noticed that it's consuming 100% of CPU, so I closed it on desktop, but it's still there consuming 100% of CPU. So I tried to send the kill signal "killall skype," and nothing happens.Then, I tried to get the process ID "pgrep skype" and then "kill process_id," but skype is still consuming 100% CPU.What the hell?
I'm new to netbooks and linux. I have an Asus 1215b (AMD FUSION E350) and I want to install an OS only for writting offline or browsing the web (and accessing to google docs or my email account) while making my battery last as most time as possible.
I'm trying to check how much ram memmory and CPU is a particular process consuming, i have checked free -m and top but is not esay to undesrtand the output from CPU
What i need is to check the consuming for a particular process; with free -m i'm able to see only the available space of memmry and i want to know how much is consuming a particular process, the same with 'top'
It's hard ot understan the output from top, to many columns and MAY process, not easy to check the process i want to monitor
I am using openSUSE 11.2 x64 with KDE 4.3.5.I am experiencing sudden, sporadic drops in performance due to the kwin and Xorg processes suddenly consuming large amounts of CPU for a few minutes (maybe 30-40% each) before dropping back to normal (1-3% each). I am seeing this using top.
After I reboot, my java process consumes 100% of the CPU then settles down to about 40% CPU and 12% memory, status sleeping (4 core AMD) I've removed the OpenJDK and installed Sun JRE but no difference. by comparison, Firefox with a lot of tabs is at 3% CPU and 5% memory. Is it better if I go to 10.04 LTS, 32 bit?
With everything visible that I can see closed, my laptop is consuming half if of it's available RAM (and that does not include caches). I can only, at an eyeball, account for a quarter of it: [URL]. Where is the rest being spent at?