Tagged Questions

1
vote
2answers
591 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
204 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
873 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
3k 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
77 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?
8
votes
3answers
5k 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
103 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
644 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) ...
13
votes
3answers
4k 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: