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

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1answer
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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 ...
1
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1answer
727 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
6k 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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0answers
81 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 ...
1
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2answers
69 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 ...
5
votes
1answer
443 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 ...
0
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1answer
839 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
112 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
46 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
3k 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
455 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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1answer
310 views

chrome memory and cpu footprint

I've searched the forums for an answer but I couldn't find quite the answer I was looking for [1] , so I thought I it could as well be of interest to more people around here. I carry out a big part ...
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0answers
67 views

Weird java memory allocation

My task manager shows that for my java process memory allocated is 16777216.0 TB (yep, TB). It happens when programming swing application with eclipse 3.8. Oh, and my distro is lubuntu 14.04. Nothing ...
7
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2answers
234 views

Why do top and lxtask show different degrees of memory usage?

Why does top show 730MB of RAM used, but the "Task Manager" shows 190MB? Some more information on my system: Lubuntu 14.04 VirtualBox Screenshots:
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vote
1answer
1k views

Rsync - memory usage

I am running on Xubuntu 14.04 and experiencing high memory usage of rsync. With a fresh start, the system is OK. I have rsync running in a cronjob, after/during rsync memory usage increases and stays ...
1
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2answers
194 views

why is all my memory used up less than 24 hours after reboot?

Running Ubuntu Server 12.04, meminfo shows pretty much all memory utilized: $ cat /proc/meminfo MemTotal: 8173180 kB MemFree: 139556 kB Buffers: 1146204 kB Cached: ...
0
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1answer
62 views

Ubuntu 12.04 LTS doesn't recognize full memory?

I have Pentium 4 Desktop, Intel D915PGN mother board with a full 4 GB of ram, but my Ubuntu 12.04 64 bit only recognize 3 GB of ram, do you guys have any suggestion? Thank you
0
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1answer
62 views

Memory is not released from swap when a program is terminated

Memory and swap are both near maximum. I shut down all the processes I initiated. The memory and swap are still both near maximum. Is there a way to release the memory used by a terminated program? ...
1
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1answer
262 views

How do I get smem to output useful results?

I recently installed smem on my ubuntu server with: $ sudo apt-get install smem It was installed correctly without errors. But when I launch it I don't get any useful information about my ...
2
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1answer
913 views

Memory is taken up by “invisible” threads

Xubuntu Saucy with 4GB RAM. When the computer is restarted and immediately after login, about 500 MB of RAM is taken according to free -m. Then I run some programs and memory usage goes above 3 GM. ...
1
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1answer
256 views

Is there a maximum swap partition size for 12.04, 64 bit

I am running 64 bit ubuntu 12.04 on HP Envy Spectre ultrabook, with 4GB of RAM. I have been running into problems with python code which uses RAM very inefficiently, see e.g. here, causing my code to ...
1
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1answer
149 views

Forgot to add swap memory during installation [duplicate]

In my ignorance I didn't add swap memory to my install. So my question is, can I work without it and if not how can I add it to my existing install? Love to get some feedback!
0
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1answer
191 views

Running an executable with fixed execution-time and memory limit and getting exit-code

What is the best way to run an executable with execution-time and memory(RAM) limit (e.g. 2.5 seconds and 32768 kB)? Also I need to get the exit-code if it exits without violating time and memory ...
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0answers
44 views

Setting Max Connections in MySQL server Globally [duplicate]

I installed my UBUNTU 12.04.4 LTS X64 yesterday and didn't installed anything except mysql-server and mysql-client. But htop showing 20 mysqld identical processes. *--Process----- MEM%---VIRT --- ...
3
votes
1answer
161 views

Will swap space auto-adjust when I upgrade my physical memory?

When I installed Ubuntu 13.10 I just ran through the default setup. Since then, I have decided to upgrade my physical memory. My question is, Will Ubuntu auto-adjust the default swap size to match ...
3
votes
1answer
229 views

How do I determine which process is using more physical memory?

I've already run free -t -m and ps aux --sort -rss, but I don't understand why there's a difference between the output of these two commands regarding the amount of total physical memory currently ...
0
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1answer
151 views

How much memory is free? [duplicate]

How much memory is free? From my understanding i have 1GB of memory, and it says free is 71MB? But why does it say that i have 536 free in buffers? So am I really using all my ram or not? ...
4
votes
2answers
352 views

How to use free -m to get memory usage for all users

I typed the free command to get the memory usage as follows : free -m output: I want to use this command to get the same info but for all users for example : I used this command .. because ...
2
votes
1answer
2k views

How to calculate the average of cpu usage and memory usage over a period of time in ubuntu

I have to generate reports for the following : 1- cpu usage. 2- memory usage. The generated reports must be looks like the following forms : I've tried with more than one command to get ...
2
votes
1answer
398 views

Why is almost all of the 3 GB RAM on my HP G62 laptop always used? [duplicate]

I am using Ubuntu 13.10 on a computer with 3072 MB RAM and 20 GB swap. It is an HP G62 laptop which overheats pretty regularly. When I type free -mt in the terminal the output is: free -mt ...
2
votes
2answers
358 views

Deactivating swap file without any computer freeze

I'm currently coding on my laptop: 4 gb of rams, never using more than 2.5-3gb but at times, I'll mess up my programs, run them with memory leaks and they'll make the computer freeze when trying to ...
0
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1answer
252 views

4GB installed, but 3GB read on Ubuntu server 10.04 LTS 64 [closed]

I have 4GB of memory installed, but only 3GB seems to be usable. How can I resolve this? Processor : Intel(R) Pentium(R) Dual CPU E2200 @ 2.20GHz root@ubuntu77:~# uname -a Linux ubuntu77 ...
0
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1answer
518 views

finding amount of memory usage of a command in bash

I wrote a program and now I need to measure it's performance so I use time to find timings but is there any command like time that I could run my program under it and have the amount of memory used by ...
0
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2answers
874 views

How can I see the memory occupied by a file and folder and also entire directory from terminal?

I'm having some files and folders in the "My Documents" directory. What are the commands to see the size of a file and directory in a terminal?
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2answers
325 views

is my ram usage natural? (clean ubuntu install by vps provider)

I'm still a Linux beginner, but for my university project I had to rent a vps. When I got my vps, free -m shows me that it is already using 175 mb of 2gb. I wanted to ask that is this normal? ...
3
votes
1answer
985 views

Which processes with daemon are unnecessary?

I saw 3 processes which have "daemon.py" at the end of them and use 10 MB of memory each of them. What do they make? Also there are a lot of processes which have daemon inside. Are they really ...
3
votes
4answers
110 views

How to monitor the memory consumed by a process?

I have a process that I would like to see how much memory it consumes while it is running. Right now I do this: ps faux | grep casper But that just gives me the information of that moment. It ...
0
votes
1answer
213 views

How much swap space should I configure? [duplicate]

How much swap space should I have? I have a 500GB HDD and 6GB RAM. My specs: Release 12.04 (precise) 64-bit Kernel Linux 3.8.0-34-generic GNOME 3.4.2 Memory: 5.7 GiB Processor: Intel® Core™ ...
0
votes
1answer
92 views

Ubuntu - One process running - Tons of memory used [duplicate]

I've installed Ubuntu using the Microsoft Windows Installer, and it's running pretty slow. I've got 3.8 GB ram on my computer, and by running free -m I'm getting the following results : ...
1
vote
1answer
476 views

Unusally High RAM usage by ESET NOD32 (Linux Desktop)

Recently, I'd encountered unusally high RAM usage on both my Ubuntu 12.04 LTS laptops (32-bit and 64-bit desktop OS versions). I noticed that, immediately after system startup, ESET will load 2 ...
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0answers
20 views

How can I find which process is using up memory? [duplicate]

top reports that 99% of the memory is used. But when sorted by memory usage Shift+M I only see about 20% being used. How can I find out which process is using all my memory? $ top top - 21:13:30 up ...
3
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0answers
1k views

Why Nautilus consumes way too much memory? [closed]

In the past 4/5 days I noticed something very strange. I am using Ubuntu 13.04 amd64. After some time from the system login I think an hour or two may be, either nautilus or python process uses too ...
0
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2answers
7k views

How to free space in root directory and delete unnecessary kernel files?

Off late I am receiving continuous system alerts regarding low disk space in my root directory. I am given to understand that all my system updates are being saved in my root directory instead of my ...
18
votes
2answers
10k views

'zeitgeist-fts' always using a lot of memory!

What is zeitgeist-fts?! It's always in the 3 top positions of memory usage (competing with Firefox and Compiz!!) ... After a fresh boot it uses about 30 MB, but after some hours or a day, it goes ...
2
votes
1answer
219 views

unity-music-daemon uses large amount of memory

When I boot my Ubuntu 13.04 up, I noticed that my fans goes crazy and when I had a glanced at System Monitor, I saw that a process called unity-music-daemon is using a large amount of memory and CPU. ...
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0answers
66 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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2answers
2k views

Ubuntu 13.04 extremely slow on my desktop

I have installed ubuntu 13.04 on my desktop computer without doing any partition, and no any dual boot operating system. My desktop hardware components are given below: Hard disk 500GB Ram 2GB ...
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2answers
69 views

Ubuntu memmory consumption problem [duplicate]

Ubuntu Gnome on my laptop boot up using about 310 MB Ram. When running couples of program, the system takes 700 to 900 MB. Then, I close all programs, Ram usage drops but it keeps at 450 ~ 600 MB Ram. ...
0
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1answer
1k views

Comparing Virtual Memory Size with Resident Size

I came across this stackoverflow post: http://stackoverflow.com/questions/10400751/how-do-vmrss-and-resident-set-size-match The answer voted correctly states the following: "So, VSS should be ...
1
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1answer
514 views

Wheres my memory going?

My machine keeps 'freezing' before eventaully logging out with all the programs exiting. This is rather annoying, and I think its because I keep running out of memory. I am not running any custom ...