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How to check the instantaneous occupied amount of my RAM the similar way the task manager shows it on my Win server?

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As far as I know , to check for the amount of installed RAM on my centos server I checked it as:

#more /proc/meminfo

Can you please let me know how can I check for the instantaneous occupied amount of my RAM the similar way the task manager shows it on my Win server?

posted Apr 11, 2016 by Vijay Shukla

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3 Answers

+1 vote

why don't you just use command:

free -m
vmstat
answer Apr 11, 2016 by Kiran Kumar
+1 vote

top shows memory usage too

answer Apr 11, 2016 by Naveena Garg
0 votes

If you have an X instance running then the GNOME system monitor will give a very similar graphical interface to the Windows Task Manager.

yum install gnome-system-monitor
answer Apr 11, 2016 by Kumar Mitrasen
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I have few questions about Cache Memory

1) My understanding of cache memory is, there are 3 type of cache memory,
1. Within RAM
2. Within CPU (L1,L2,L3)
3. Separate Hardware which is costlier than all others.

Please correct if I am wrong,

2) Who stores the data into cache? I mean, can we write a program which should use only cache memory? If yes then how to do it? if no then who manages that?
For example,
Cache memory within RAM, is it managed by Kernel?(Memory Management Unit)
Cache memory within CPU, is it managed by CPU itself?

3) Why cache memory is faster than RAM?

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