total system memory

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10-02-2001, 08:08 PM
clinton

Is there a way to find out the total memory that a unix system has? I mean total memory that a system running oracle has.
10-02-2001, 09:47 PM
grjohnson

Do a top command at the unix prompt

> top

Memory: 2048M real,

Tells you how much RAM you have on your system.

Cheers
10-03-2001, 05:16 AM
Sureshy

you can also check how much memmory is available using :

#sar -r

#man sar
will give you help pages on this.

man -k will give you related commands to a subject of your choice. e.g. man -k memmory.

Suresh
10-03-2001, 06:20 AM
julian

Quote:

Originally posted by grjohnson
Do a top command at the unix prompt

> top

TOP is not installed by default in Solaris for example.
10-03-2001, 06:58 AM
sazzadur

You can also try

prtcnf|grep mem
10-03-2001, 07:00 AM
sazzadur

Sorry that should be

prtconf|grep mem

never could use a keyboard
10-03-2001, 07:59 AM
julian

Quote:

Originally posted by sazzadur
Sorry that should be

prtconf|grep mem

never could use a keyboard

I am afraid PRTCONF does not work in Solaris. It works in HP and Linux.
10-03-2001, 08:28 AM
ales
Quote:

Originally posted by sazzadur
Sorry that should be

prtconf|grep mem

never could use a keyboard

That should be

prtconf|grep -i mem

Quote:

Originally posted by julian

I am afraid PRTCONF does not work in Solaris. It works in HP and Linux.

Strange, in my Solaris does ... try lowercase ;-)
```
$ uname -sir

SunOS 5.6 SUNW,Ultra-4

$ prtconf|head -2

System Configuration:  Sun Microsystems  sun4u

Memory size: 1024 Megabytes
```
10-03-2001, 09:01 AM
julian

Quote:

Solaris does ... try lowercase

Yep, it worked :-)
09-06-2002, 11:27 PM
a128

For finding out free memory on Solaris, I've tried as suggested but it complains:

# sar -r
sar: can't open /var/adm/sa/sa06
No such file or directory

I went to the /var/adm/sa and check, there is no sa06 indeed. Do I need to do anything before I run sar -r?

Thanks,
09-07-2002, 05:57 AM
julian

Quote:

Originally posted by a128
For finding out free memory on Solaris, I've tried as suggested but it complains:

# sar -r
sar: can't open /var/adm/sa/sa06
No such file or directory

I went to the /var/adm/sa and check, there is no sa06 indeed. Do I need to do anything before I run sar -r?

Thanks,

What happens when you type

prtconf|head -2
09-07-2002, 07:15 PM
a128

When I typed prtconf | head -2, I do get total of 2GB physical memory. However, that is total physical memory but I am looking for free memory at current time. I need to find out about current free memory available because my production database hung and I need to find out whether running out of free memory and/or swap space was an issue.

Thanks!
09-08-2002, 04:12 AM
julian

I see. Why don't you try (for example) vmstat 5 5. It will show you the (approximate) free memory.
09-09-2002, 11:12 AM
tamilselvan

Run top command.
Look at the 4th line. You will see
Memory: 8192M real, 3566M free, 52M swap in use, 2000M swap free.

From the report, free memory is 3566MB .