Questions related to memory usage related to RAM, swap; issues expansion, in Ubuntu.

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Getting ' Critical Low Memory ' error in ubuntu 12.04.

Though my system has enough RAM and ROM memory. It is showing me this error. Previously it was showing " Low memory " only. But now it is showing " Critical Low Memory ". Can anyone help me in ...
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1answer
34 views

Increasing memory for ubuntu 14.04 LTS [duplicate]

I have installed ubuntu besides Windows XP and it is using only 5.9 GB of total drive space. I would like to know how to increase the size?![enter image description here][1]
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21 views

Freeing page cache using echo 3 > /proc/sys/vm/drop_caches doesn't work?

free -m total used free shared buffers cached Mem: 24055 22439 1615 8969 16 9096 -/+ buffers/cache: 13326 10728 ...
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33 views

Ensuring fail-safety of an Apache server

I have a few Wordpress websites running on Apache 2.4.7 / Ubuntu 14.04.2 LTS. It is a virtual machine running on Microsoft Azure. The websites are using a MySQL server also running on the same ...
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1answer
47 views

Is ubuntu able to kill a process because of low memory and how to know it

Everything is in the title. I'm running a play framework and a redis process on my ubuntu 2GB RAM VPS but last night the 2 processes suddenly crashed without any log (which is weird because they ...
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Memory leaks with zeitgeist-fts. It takes 1.2 GiB of memory [duplicate]

I have a memory leak with zeitgeist-fts which takes up 1.2 GiB of memory. A screen capture can be found here: When I kill process, memory is released and everything is working fine. Then again, ...
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0answers
31 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 ...
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2answers
112 views

how to see CPU and memory usage for a program after run it

I wrote a shell script and run it with terminal.script call another programs to run and have some child process. how can i see TOTAL memory and CPU used for that script after run it ? more generaly ...
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40 views

Why my memory is shooting to nearly 100 percent which makes my laptop unable to work?

I am a newbie. I am currently using xubuntu 14.04 on my old dell laptop (~8-9 years old). When ever i watch any video on YouTube or similar site the video is not coming properly. I am not able to do ...
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12 views

Ubuntu VM shows different RAM then what vCenter is showing

I created a 64-bit VM with 4 GB of RAM and installed Ubuntu 14.04 64-bit The command, free –g, shows a total of 3GB The details screen on the desktop shows 3.9 GB vCenter Server Performance Monitor ...
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14 views

How can an application be allocated to multiple core CPU's?

In Ubuntu 14.10 64-bit, running femm42 finite element analysis software via wine. The solver reports "out of memory" when it attempts to create/load the "mesh", which is done through embedded Triangle ...
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34 views

Jave heap space error appearing Linux ubuntu 12.04

I'm running my program and this error appears after some time java.lang.OutOfMemoryError: Java heap space at HadoopMyapp.HistogramPair.<init>(HistogramPair.java:25) at ...
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37 views

java.lang.OutOfMemoryError: Java heap space

I'm using Hadoop in my application, but just before the program exits I get this error java.lang.OutOfMemoryError: Java heap space I already modified the mapred-site.xml and added this property to it ...
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1answer
43 views

How to free up my laptop's RAM?

I have an old DELL laptop with 2GB of RAM and Ubuntu 14.04 (64-bit) as its OS. Many times I am out of RAM and thus every thing goes very slow! I think there is many background programs (services or ...
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1answer
137 views

How to prevent running programs from consuming all RAM and CPU?

I have an annoying problem with Ubuntu's resource management. Frequently it happens that some programs such as Google Chrome browser consume 100% CPU and most of my laptops memory. I want to have a ...
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38 views

What in install.sh in Kubuntu 14.04?

My laptop fan is sometimes loud when running Kubuntu 14.04, I guess it is because of one process taking 12-13% of CPU memory. I am new with KDE/Kubuntu. What is that? Should it be running like ...
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1answer
28 views

Creating a script involving the memory usage of processes

How can one create a bash script that displays the sum of memory usage for the processes which have PID<100?
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13 views

How much of the java program does Ubuntu memory-share between programs

For a given java version, say Oracle Java 7, how much does Ubuntu fetch the Java runtime modules (and linked libraries) from disk for each JVM, v.s. holding a copy of them in shared memory to be ...
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2answers
45 views

Swappiness for aggressive swapping

I want to configure the Ubuntu 14.04 with aggressive swapping behavior. I'm using Linux kernel 3.14. I modified the swappiness using the following command. echo 100 > /proc/sys/vm/swappiness ...
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1answer
130 views

I can't use all my RAM!

I know somebody will mark this as duplicate, but I can't find the answer, so I'm asking. I have 3GB of RAM and Ubuntu says: Memory 2.9 GiB. No, it is NOT my onboard graphics card, because it uses only ...
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23 views

Increase Virtual Machine's Hard Disk Memory [duplicate]

Im running Ubuntu 12.04 in my Virtual Box. An error occurs as I copy files using the command below: sudo cp -R /dspace/webapps/* /var/lib/tomcat6/webapps This is the error : cp: cannot create ...
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26 views

low memory dialog at boot up time

My Ubuntu 14.04 laptop has the below partions /dev/sda1 ext4 9.3G 8.6G 227M 98% / none tmpfs 4.0K 0 4.0K 0% /sys/fs/cgroup udev devtmpfs 3.9G 4.0K 3.9G ...
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2answers
91 views

Why can't my laptop use more than 85% of my RAM?

I have 1GB RAM in my notebook (HP Compaq 6735s), but the video card is using 256MB, so I'm left with 768MB RAM. However, whenever my system starts using more than 85% of memory, it becomes unusable. ...
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1answer
90 views

How to read memory usage?

Well I'm pretty confused with the memory usage in ubuntu (probably linux in general) TL;DR: Memory usage is 70%. When ich check top, htop, ps aux etc. I can see there should be a memory usage of ...
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2answers
101 views

Understand free command with top command

I have a doubt. I start ubuntu and run free command. I will get the total free space available. Let say it as 100MB. Now I run a few applications. So after some time, I again run the free command. ...
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2answers
1k views

How to increase JAVA Heap Size?

I need to increase the default java heap size to get OpenNMS Linkd service running smoothly, and fortunately I have 4/5 of my total installed memory free at any given time even when their is maximum ...
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0answers
88 views

Total RAM discrepancy: who's right?

I started with two 1gb sticks of top quality fast (at the time) DDR2 RAM, rated to at least 800mhz, possible 1000. I've since added two 2gb sticks, making 6gb total. System Profiles (aka cat ...
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1answer
253 views

Very slow after idle for some hours in 14.04

I had 12.04 without problems, but since I upgraded to 14.04, I'm noting the system is very slow for UI tasks, and when I get to work the next day (computer stays on), and I type the passwords, it ...
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0answers
104 views

TuxOnIce hibernate error “seeking to free XXXXMB of memory” on Ubuntu 14.04

My desktop PC did not support for hibernate on Ubuntu 14.04. Therefore, I installed TuxOnIce (kernale 3.13.0-36-generic-tuxonice) to enable hibernate feature. Now, the hibernate feature works fine on ...
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1answer
101 views

mysqld is suddenly taking too much memory and my laptop is getting hotter

I have been using ubuntu 14.04 for a while but really new to linux command line stuffs. I mainly use it for Java/android/web development purposes. Sometimes I notice my laptop gets more hot than ...
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51 views

How to find and report memory leak

When I use any graphics or diagram editing software like Gimp or Dia (and I have tried a couple more) I suddenly find the cache sucking up all my free RAM and cache which slows the system down to a ...
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1answer
30 views

find is using a LOT of resources - how do I find out why?

My Ubuntu 12.04 LTS system has been running very slow lately. I keep having to reboot it, and then within 24 hours it's slowed down again. I've gone in and run top and what keeps coming up at the ...
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1answer
74 views

How to find out which programs are taking up alot of memory?

I've been getting messages that I have exceeded my quota limits. I am new to Linux and am not sure what to do. With windows, I could easily just go to Control panel, add/remove programs, and uninstall ...
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1answer
65 views

How do I prioritise physical memory for a particular process?

I have a process which is consuming roughly 13.5GB on a machine with 16GB running Ubuntu 14.04. The available memory according to System Monitor is 15.6GiB, of which 1.7GiB is reported as being used ...
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0answers
40 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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1answer
992 views

Ubuntu 14 too high memory usage [duplicate]

I had browse for this issue in the forums, but the answers I found are not concrete or refers to older version of ubuntu. I am using ubuntu 14 (3.13.0-35-generic #62-Ubuntu x86_64 x86_64 x86_64) ...
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1answer
33 views

Why does ubuntu not protect itself against memory shortage

If you create a very simple script, simply pointing at itself ie: /home/user/loop.sh and then executes the script in terminal (as regular user), it starts to consume more and more memory, until the ...
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1answer
59 views

RAM vs UBUNTU probem [duplicate]

I have a problem with Ubuntu's memory management. I am running 32-bit Ubuntu 13.10. My system is only running Chromium. However, when I run free -m, it returns: total used ...
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1answer
164 views

I only have 1GB of ram, what can I do to improve the performance on my 32-bit 14.04 system? [duplicate]

I'm running a fresh install of Ubuntu on an old iMac. It was going painfully slow on OSX so I wiped that and installed Ubuntu overtop of it hoping it would speed things up a bit. I'm not going to be ...
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1answer
534 views

What is the difference between free and vmstat commands?

vmstat output: procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 1 1 0 1001568 84736 ...
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2answers
4k views

What swapfile size to make? I have 4GB RAM [duplicate]

Very often I am out of memory and I noticed that I didn't have swapfile... What size should I choose? I have 4 RAM. All programs which I use are: Firefox, Thunderbird, Grive, Android Studio, that's ...
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72 views

RAM usage in Chrome

I run quite a few windows and tabs open is Chrome on a regular basis and while on Ubuntu it seems to seriously bog my system down. 4gb ram and 4gb swap. This laptop is dual booted with Windows 8.1 ...
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2answers
61 views

How can I reduce the memory

How can I reduce the memory allocated for a given program from the terminal? what I mean is if I have a a.out executable file, how can I make it run in a less memory from the terminal ( with out ...
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votes
1answer
365 views

How to set a memory limit for a specific process?

I tried to execute mpiexec -16 ... on a 384 GB RAM server, but it induced OOM Killer and was aborted. How can I set a memory limit for mpiexec execution? I know ulimit, but it might affect other ...
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0answers
505 views

Why does ubuntu not seem to release memory?

I am working with apache2+php and other web server apps. I have monitor as session connecting to a web server. RAM memory is full. But when disconnecting a session, it does not free the RAM memory. ...
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2answers
105 views

Can't find where memory is being used

I'm still a novice with Ubuntu, and have converted an old Toshiba L655D to use the OS. I have 3gb of memory installed, and this appears on on the GRUB memtest. But within Ubuntu, looking at free -m ...
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1answer
41 views

ubuntu server crash after build.sh run

I have a build server with Ubuntu. And in my source code there is typical build.sh to invoke the make file in order to compile the source code. But suddenly the server crashed and I found the below ...
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1answer
2k views

How to clean up dev/sda1 as it's full

I've been doing jmeter tests and have had a few OutOfMemoryExceptions, so I've bumped up the heap memory in JMeter. But now it seems I can't run anymore tests as it says I'm using 94.9% of 14Gb. When ...
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3answers
316 views

Like “PerfMon” in Windows do we have something similar in Ubuntu?

If I want to capture performance log of a Ubuntu (or any other Linux Distro) Server/Workstation for a period of time, how would I do that? In Windows, I use something called PERFMON.MSC (LOGMAN.EXE), ...
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66 views

s3cmd causing huge memory usage on 12.04 server

Today I installed s3cmd on my server to facilitate backups to s3. Everything is working great, and I even scheduled a cron job to regularly back up. Then I went and checked my Media Temple dashboard ...