1
vote
2answers
813 views

Ubuntu detects only 3.6GB RAM (of 8 gigas) on a 64bit OS (11.04 )

The BIOS detects it fine and shows 8GB. Even lshw shows 8GB memory but somehow only 3.6GB is usable. Output of uname -a Linux Prod 2.6.38-15-generic #59-Ubuntu SMP Fri Apr 27 16:03:32 UTC 2012 ...
2
votes
3answers
244 views

Why isn't my SWAP cleared after usage?

When I use a lot of RAM (90-100%) then the laptop normally starts using SWAP so if I look in htop during that intense usage I see it's using 200MB of SWAP. But when I stop using the laptop (the ...
3
votes
1answer
984 views

zeitgeist-daemon excessive RAM usage

I have installed last week Ubuntu 11.04 64 on a new machine. I am running the GUI using Unity. However I have noticed that after 1-2 hours the process zeitgeist-daemon starts using excessively the ...
8
votes
5answers
6k views

How do I check how much physical RAM I am using in GB or MB format?

How do I check my whether my Ubuntu is 32-bit or 64-bit and whether or not it is using full RAM? I'm concerned that because my system is 32-bit it isn't using the maximum OS-supported RAM. It says my ...
1
vote
1answer
82 views

What are the /dev/ramX devices?

In /dev I have 12 or so devices named ram0 ram1 etc. What are those? What can they be used for?
10
votes
4answers
8k views

How to permanently enable compressed ram swap? What version to use?

EDIT: In precise there's now zram-config. It's an upstart job compressing up to half of your ram spread over $(number of CPU cores) swap devices. It didn't allways start at boot but issuing sudo ...
0
votes
1answer
121 views

Actual computer memory used by Windows XP virtual machine?

I loaded a Windows XP iso into Virtual Box and my computer went from 415 to 407 GB, how did this happen?
7
votes
4answers
676 views

Where has all the RAM gone?

I have 1GB of RAM, and when I run NetBeans and Firefox, they get about 300MB of RAM. At some point, the system becomes very slow, probably 100 times slower than normal, switching windows (Alt+Tab) ...
14
votes
3answers
5k views

Why is Unity (Compiz) consuming more and more RAM? [closed]

About 3 to 4 hours after turning on my PC, compiz 'memory usage' rose from 300MB up to 1.5GB! What is happening? What is wrong? Here is the screen-shot from system monitor: