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HOW MUCH RAM IS FREE TO USE [message #570851]

Fri, 16 November 2012 08:25

thiyagusham
Messages: 112
Registered: April 2012
Location: Chennai

Senior Member

free -m

root@localhost ~]# free -m
             total       used       free     shared    buffers     cached
Mem:          1010        349        661          0         27        212
-/+ buffers/cache:        109        901
Swap:         2047          0       2047

1.I want to know What's the purpose of swap area ..
SWAP never used in my system always showing used space is 0.

2. how can calculate ram used % here ..?

>> how the formula applied here >>

3. Quote:

212++27 = 239
349 -239= 110
110+901 =1011 ...[confused]
349 ,109 how it was calculated here ..
i asking little bit explanation 239+110= 349

Regards
Thiyagusham.G

[Updated on: Fri, 16 November 2012 08:26]

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Re: HOW MUCH RAM IS FREE TO USE [message #570857 is a reply to message #570851]

Fri, 16 November 2012 10:47

Michel Cadot
Messages: 68722
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

1. Maybe a little search on the web or on the documentation will answer that.
2. Myabe 100*used/total?
3. "i asking little bit explanation 239+110= 349":
from right to left: 9+0=9, 3+1=4, 2+1=3, so 239+110=349, this is an easy case of addition, there are more complex ones when you have to report tenth on the upper level but this is for your year work class.

Regards
Michel

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Re: HOW MUCH RAM IS FREE TO USE [message #570860 is a reply to message #570851]

Fri, 16 November 2012 12:31

John Watson
Messages: 8961
Registered: January 2010
Location: Global Village

Senior Member

If you want a one sentence answer:
It is the third line that matters, ignore the rest.

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Re: HOW MUCH RAM IS FREE TO USE [message #570864 is a reply to message #570860]

Fri, 16 November 2012 13:08

thiyagusham
Messages: 112
Registered: April 2012
Location: Chennai

Senior Member

@ Michel;

I am not asking this ..

from right to left: 9+0=9, 3+1=4, 2+1=3, so 239+110=349, this is an easy case of addition,

Quote:

Performance team is saying DB utilizing high memory.
DB team is telling DB utilizing low memory.

So that i want to check how it was calculated...

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Re: HOW MUCH RAM IS FREE TO USE [message #570867 is a reply to message #570864]

Fri, 16 November 2012 13:28

BlackSwan
Messages: 26766
Registered: January 2009
Location: SoCal

Senior Member

IMO, measuring RAM usage by Oracle is not precise on any *UNX system

[oracle@localhost ~]$ free
             total       used       free     shared    buffers     cached
Mem:        909120     820600      88520          0      14992     557404
-/+ buffers/cache:     248204     660916
Swap:      1735012         24    1734988

above is from my system; which is perfectly acceptable to me.
From what you posted only about 1/3 total RAM on your system is being used.
>Performance team is saying DB utilizing high memory.
They are wrong or misguided.

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Re: HOW MUCH RAM IS FREE TO USE [message #570873 is a reply to message #570867]

Fri, 16 November 2012 13:59

thiyagusham
Messages: 112
Registered: April 2012
Location: Chennai

Senior Member

@ Blackswan

Sorry i made one mistake.
Quote:

In my working env Performance team is saying DB utilizing high memory.

I tried to calculate the formula so ,

I posted my own pc status .. Sorry for confusing you .

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