Memory explanation

[Sam Dee]

Hi guys,

We've got physical memory of 2 GB.

Using the top command on HP-UX 11i the following is displayed

Memory: 818000K (483536K) real, 1795960K (1177824K) virtual, 20020K free

Please if anyone one can tell me what is real, virtual and free.

Thanks in Advance
Regards
Sam

[Fred Ruffet · Accepted solution]

real is memory in use.
virtual is memory used for swap in RAM.
free is free :)

if you sum all of these you have your RAM.

[Steve Steel]

Hi


Look at
Memory Usage (â What is using all of the memoryâ ?)

by:eric.herberholz@hp.com

Last modified: April 7, 2004

Latest version also available at external ftp site:

ftp://eh:spear9@hprc.external.hp.com/memory.htm


Open the web site and you will learn it all about memory


Steve

[Geoff Wild]

Here's a nice program called memdetail - just compile it.

Output like:

# memdetail
Memory Stat total used avail %used
physical 10080.0 10034.5 45.5 100%
active virtual 10957.9 4345.1 6612.8 40%
active real 7617.8 2941.9 4675.9 39%
memory swap 7697.2 1526.9 6170.3 20%
device swap 26528.0 10597.0 15931.0 40%



Some info on memeory here:

http://www2.itrc.hp.com/service/cki/search.do?category=c0&docType=Security&docType=Patch&docType=EngineerNotes&docType=BugReports&docType=Hardware&docType=ReferenceMaterials&docType=ThirdParty&searchString=UPERFKBAN00000726&mode=id&admit=-1335382922+1054213293587+28353475&searchCrit=allwords&printable=true

Rgds...Geoff

[Sanjay_6]

Hi Sam,

Try these two links,

http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000068500228

http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000072760485

The itrc doc ids are A3940339 & RCMEMKBRC00005784.

To find the total memory on your system, try

1.) echo 'selclass qualifier memory;info;wait;infolog' |cstm |grep 'Total Configured'
2.) grep Physical /var/adm/syslog/syslog.log

Hope this helps.

Regds

[Sam Dee]

Thanks guys.
I have got a lot information to use.

BR
Sam