Random-access memory (RAM) is a form of computer data storage. Today, it takes the form of integrated circuits that allow stored data to be accessed in any order with a worst case performance of constant time.

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Ubuntu 14.04 64 bits - Only half of the RAM is recognized

I have 8 GBs of RAM (2 4 GBs memory sticks) in my computer. They are recognized by Windows 10, the "memtests" and the BIOS, but Ubuntu doesn't show more than 3696 MBs. I already tried several ...
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80 views

Ubuntu 15.04 crashes with scattered screen

I have recently installed 4GB DDR3 RAM (Innex) with an existing 2GB RAM (Dynet), currenlty it runs with 6GB RAM. I use Eclipse, Java, Chrome extensively for my development purpose But after this ...
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100 views

“-/+ buffers/cache memory” is zero

i have an OpenVZ VPS with ubuntu server 14.04.2 and i can access to a SolusVM control panel. Recently, "memory usage" is always 0 KB, and only "vswap usage" shows real swap usage. if i run free -k i ...
3
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140 views

Lubuntu: text on system menus/bars appears blurred when memory usage is high

I have an old system (Core 2 Duo 2.0 GHz, 3 GB RAM), running Lubuntu 14.10. When I run memory intensive applications, the text on title-bars, menu-bars and notification panels appears extremely blurry ...
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50 views

Is it possible to suspend applications?

The main idea is to add a "suspend" button to the title(behind the "quit" cross button) of the application window that will copy the memory taken by application to swap/local storage with pid ...
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0answers
3k views

Is there a default limit to the amount of memory a process may use?

Running 64-bit Matlab 7.12 on a 64-bit 10.04 Ubuntu Server. When I try run a big problem that should need 46GB of memory (the server has 72GB of Memory and plenty of swap space), the experimental ...
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0answers
40 views

Edit Aufs Tmpfs partition size

I followed this instruction https://help.ubuntu.com/community/aufsRootFileSystemOnUsbFlash to create a aufs RAMDISK for my xubuntu. It creates a 512MB Filesystem. SO, HOW CAN I CHANGE THAT SIZE FOR ...
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1k views

ZFS - Always Out of Memory

I read that ZFS was set to use all physical memory except 1GB on systems that have 4GB or more. Since I have virtual machines running my home-server that is running the ZFS filesystem, I wanted to ...
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339 views

Chromium build fails due to `out of memory` allocation

I am trying to build chromium content_shell. But it fails at the last linking stage because of out of memory. Error Log: [1/1] LINK content_shell ... /usr/bin/ld: out of memory allocating ...
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351 views

huge cached memory, mostly freez system :(

I have a problem with system memory cache, i think it is bigger than normals. after 5-10 minute of usage, system become unusable and i must restart my "Asus X451-CA" laptop. this command ran upon user ...
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234 views

Can only access 1.9 gb of RAM on Ubuntu 12.04

So I installed Ubuntu 12.04 (edit: 64-bit) on my PC. My PC had 4 GB of RAM installed, which the BIOS recognizes. It also displays when I type uname -m, so the OS knows it's there. However, according ...
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367 views

ubuntu 12.04 Init process provokes memory leak and CPU intensive usage

I have lately been having some memory and CPU issues with init process. After rebooting, the memory used by it keeps increasing at quite high pace, and after half hour it occupies all the memory RAM ...
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422 views

Ubuntu crashes with high memory use without swapping

I'm running some memory intensive calculations on Ubuntu 13.04. I have 8 GB of RAM, and a swap partition with the same amount of memory. The hard disk and swap partition are encrypted. › free -m ...
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0answers
282 views

Can I have a Ubuntu 12.04 live usb work with both the -persistance and -toram additional boot options?

I really like using the Ubuntu 12.04 live CD/USB's "-toram" additional boot option for my laptop because "-toram" adds a few extra hours to the battery and makes things a little faster. I add the ...
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0answers
1k views

Ubuntu 12.4 on 3.4.45 kernel: Can't access USB memory stick

I installed kernel version 3.4.45 [LTS] on ubuntu 12.4 on a Acer laptop. With this configuration, the USB memory drives can't be accessed, some details are follows. Upon inserting the USB drive dmesg ...
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179 views

Why do I run out of memory even when nothing is running?

I am currently facing a problem that when I run Uclust, it keeps showing me mymalloc running ot of memory. The thing is that cuurently nothing is running in the system and my memory shows I am ...
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0answers
316 views

Ubuntu 12.04 tilts when trying to open large excel file with libreoffice or matlab

I have an xlsx-file of size 27.3MB and when I try to open it either in Libreoffice or Matlab the whole system slows down My processor is AMD Sempron(tm) 140 Processor (should be about 2.7Ghz) Memory ...
2
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0answers
310 views

Anything sync daemon for Ubuntu?

Is there a utility providing similar functionality to Anything sync daemon for 64bit Ubuntu? Preferably in the repository or with a PPA. In particular, I'd like to stop Firefox from constantly ...
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267 views

Problem with the allocated partition memory

I installed ubuntu 12.04 using wubi on to a 60GB partition. I installed Qt sources, which are a couple of GB in size, but once I start commpiling it started complaining about lack of memory. I ...
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33 views

Hard freezes when RAM is exceeding

I have 8GB RAM, when memory is exceeded (chrome + vbox + something else): hard mouse freezes permanently lit SSD led in 90% of cases I can't login in tty, system without any response, necessary to ...
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38 views

Ubuntu 14.04 installation stops when copying files

I have the following system config i5 processor, 4gb (2+2) ram, 1gb graphics card, 500gb hard disk. I tried adding another 4gb ram to my system. So I added the newly bought 4gb ram into my pc and ...
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165 views

Failed to alloc mem for ROM

So recently, I've bought the HP Pavilion x2 detachable. It came with Windows 10 but I wanted to install Ubuntu on it. I tried to install Ubuntu 15.10 but every time I tried to do that, the computer ...
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98 views

MySQL gradually taking up more and more memory

Just to start with, I have read the following threads and they do not help: Optimising MySQL settings - mysqld running out of memory MySQL Server keep shutting down ...
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0answers
103 views

Kernel keeps killing Java process due to Out of Memory

I am trying to solve a CPLEX problem using the Java library but the kernel keeps killing my process due to "Out of Memory". I've tried setting memory limits on the CPLEX program and I've tried ...
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42 views

Netbeans uses all shared memory

Recently I noticed that when Netbeans is running, many other programs look strange when I run them,for example VLC's "floating controls" look transparent, and there is an overlap of text in the non ...
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0answers
215 views

Why does Ubuntu 15.10 64-bit only detect 2.6 GB of RAM on my 4 GB Laptop?

Mostly Fixed I'm using a ThinkPad X240, and most linux distros report my total RAM as 3.8 GiB, but Ubuntu 15.10 is reporting 2.6 GiB. I'm running 64-bit Ubuntu. I've checked my BIOS, and it says I ...
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39 views

how to enable 1MB dma-kmalloc

I'm running a ubuntu 15.10 VM and testing code that will allocate 1MB dma buffers. However, from the /proc/slabinfo, the max that can be allocated is 8K dma-kmalloc-8192 0 0 8192 4 ...
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77 views

Set limits on processes ubuntu

I am using my ubuntu to do some programming assignments at college and it keeps hanging. For example, If I have an infinite loop in my C code by mistake, ubuntu freezes. If my C program allocates ...
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0answers
79 views

constantly files corrupted after ssd and ram upgrade

I have a ~5-year old ThinkPad x201 and it worked fine until I chose to update my ram and disk to now: description: SODIMM DDR3 Synchronous (according to sudo lshw -class memory (M471B5273CH0-CH9 and ...
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0answers
113 views

Xubuntu won't boot after RAM upgrade

I just upgraded the RAM in my notebook, from 3 to 8GB. Right after this, Xubuntu won't start, blinking some text before rebooting and failing again. I could only read "PCC probe failed", but there was ...
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107 views

Running Live with 4GB RAM. 32-bit or 64-bit?

I have a laptop with 4GB RAM and it is fully 64-bit capable. However I prefer to run Ubuntu from Live CD or USB. This takes 2GB of the RAM as the main drive. Does that leave me with 2GB of RAM? ...
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66 views

Extremely slow OS. Swap related?

I really hope you can help me. An inexperienced sysadmin, installed Ubuntu on a new Dell Desktop, it's a pretty powerful machine, and I ran a bunch of hardware tests, and can confirm that RAM/HDD and ...
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0answers
41 views

Prevent page cache above certain RAM usage level

Someone here on AskUbuntu pointed out that disk caching is harmless thing, that only makes your disc read times faster. And that it is birds singing and flowers only. I kinda have to disagree: I ...
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0answers
941 views

Unable to find an initial ram disk that I know how to handle

After upgrading to the next linux image, aptitude has outputted the following lines: Setting up linux-image-3.16.0-38-generic (3.16.0-38.52~14.04.1) ... Running depmod. update-initramfs: deferring ...
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0answers
178 views

Firefox eventually for no aparent reason consumes all CPU and RAM and grinds to a halt pulling my computer along with it

I now use Firefox as my default browser and have found that after having it up and running for several hours, that it starts to use up more and more of my CPU and RAM, and this does not appear to have ...
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0answers
118 views

Ubuntu 12.04 only recognising 2.9Gb Ram out of 4Gb

Yes it is a 32-bit installation, but there is supposed to be PAE that allows it to use all of the ram. The command: sudo lshw -class memory | grep GiB -m 1 Tells me that yes there is 4Gb ...
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0answers
331 views

X.org is allocating more than 900MB of RAM but xrestop says ~1/40th of that is actually used; how I force it to free the rest without restarting X?

So X.org is allocating an insane amount of RAM: right now 910MB (according to the RES column in htop), second only to Firefox (really Nightly) (at just over 1GB) and trailed by GNOME Shell (at only ...
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78 views

What does it mean for /proc/kpagecount to be zero

for some entries in /proc/kpagecount, all the 64 bit entry is zeros and yet the page is allocated (confirmed from /proc/kpageflags). What does it mean for kpagecount to be zero for certain physical ...
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0answers
56 views

Memory issue. How to identify the root cause using free

I am running two application on my system. When I run two applications in parallel, Memory gets consumed within a few minutes.. [Data below is not actual.. Just for explanation] Initial state.. ...
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0answers
69 views

Why does it state that *-cache:1 DISABLED at lshw command

It seems like my memory is working correctly but I am puzzled by the output of the following command. Is the memory disabled and how do I go about testing it if it may be. $ sudo lshw -C memory ...
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0answers
99 views

Oneconf eating up memory while in chrome

When I look at the dependencies in Synaptic, it shows Ubuntu desktop, and software center as being dependent on oneconf, and I do not wish to remove these. However whenever I get to a page which has ...
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0answers
68 views

How to persistently limit resources of a program

I am running several programs on my computer and under normal circumstances my RAM (2GB) and CPU power is sufficient. However it occurs that a single program suddenly turns the system permanently ...
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0answers
136 views

Disk cache is sometimes dropped/erased

I have a memory/cpu monitor running, and sometimes see the graph line for “cached memory” drop, for no apparent reason. Earlier today Cache memory was at about 4.8GB but then dropped in two steps ( a ...
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0answers
53 views

Linux kernel: page substitution policy

I am supposed to answer for homework which algorithm is implemented in Linux for the virtual memory page substitution and also give some extracts of the code to prove that. After some research I have ...
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0answers
9 views

How can I reserve memory for a specific application? (redis in this case)

I've installed Redis-Server on an Ubuntu Server 14.04 64 bit LTS and assigned 47GB of RAM as am expecting to temporarily hold data in RAM before dumping it eventually to Postgresql. I've noticed that ...
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0answers
51 views

High usage of ram in Ubuntu 16.04

I have a problem since I upgraded from 15.10 to 16.04 some days ago: My ram is almost completely full! I have 8 GB of ram on my system, currently 6,9GB are used (with just firefox open). I've ran a ...
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0answers
33 views

RAM Memory Not Recognized

Today I put a new 8GB RAM, replacing the old 4GB one, but it's not recognized by Ubuntu nor by Windows 10 (I have dual OS). Now I have only 4GB recognized because I didn't replaced both of them. I ...
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0answers
22 views

Do I have 2 more free slots for RAM?

I ran sudo dmidecode --type memory and the result was: # dmidecode 3.0 Getting SMBIOS data from sysfs. SMBIOS 2.7 present. Handle 0x000C, DMI type 16, 23 bytes Physical Memory Array Location: ...
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0answers
14 views

Ubuntu server and mysql with bitnami

I'm hoping someone can help me or point me in the right direction. I have an Ubuntu 14.4 server running as a web server which we run a WordPress installation on, We've used the Bitnami installer to ...
0
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0answers
17 views

Ubuntu running extremely slow on P4 1GB RAM. New Install. Used to run well previously

i am currently running Ubuntu 14.04 64 bit on a Pentium 4 with 1 GB DDR2 RAM. It used to run butter smooth on 2 GB RAM. Unfortunately I had to remove 1 RAM card to use in another old PC. And now, in ...