ram size in sun solaris

Shell Programming and Scripting
1

I need to check ram size and currently free in sun solaris box

2

Total ram: prtconf | grep Memory
For current free, it would be best to use top. Or else, you can use vmstat.

3

> prtconf | grep Memory
Memory size: 8192 Megabytes

The above is 8mb ???

> vmstat
procs memory page disk faults cpu
r b w swap free re mf pi po fr de sr m0 m1 m5 m6 in sy cs us sy id
0 0 0 6346568 2718288 0 0 0 0 0 0 0 11 0 2 2 4294967196 0 0 -17 -10 -1
34

could u tell me total physical memory and free memory now

4

8gb you mean ...

5

Physical memory is 8mb is ok

Now tell me free memory

6

generally vmstat gives the statistics of the virtual or swapped memory memory, here this statistics may changes based on the process handling, so
prtconf | grep Memory is the only instance of getting the physical memory info

for getting the available free memory using free only we can get

7

How do I know the free memory for creating another oracle instance

8

Use sar -r. The output is in pages available:
[quote
-r reports unused memory pages and disk blocks:

                 freemem                 average pages avail-
                                             able     to     user
                                             processes.

[/quote]

You can check the pagesize on your system using the pagesize command and multiply that with the freemem to get the number of bytes free.

9

00:00:00 freemem freeswap
00:05:00 55231 3516920
00:10:00 55697 3523353
00:15:01 55820 3525048
00:20:00 55831 3516405
00:25:00 56004 3527199
00:30:00 56557 3536617
00:35:01 56658 3537858
00:40:00 56096 3519500
00:45:00 56544 3533461
00:50:00 57110 3538281
00:55:00 56966 3526247
01:00:00 57622 3543673
01:05:00 58208 3544007
01:10:01 58125 3541247
01:15:00 58566 3540626
01:20:00 58934 3553958
01:25:00 59873 3570670
01:30:01 60686 3584695
01:35:00 60732 3574105
01:40:00 61099 3586523
01:45:01 60866 3579143
01:50:00 60587 3564594
01:55:00 60976 3579511
02:00:00 60993 3578550
02:05:01 63150 3567562
02:10:00 62358 3540240
02:15:00 62561 3547554
02:20:00 62368 3541880
02:25:00 63065 3557576
02:30:01 63227 3559676
02:35:00 62705 3542004
02:40:00 58721 3471088
02:45:00 60885 3509944
02:50:00 60637 3505715
02:55:00 57674 3443795
03:00:01 62115 3532625
03:05:00 62327 3525089
03:10:00 62911 3541438

Average 59487 3540225

freemem command is not working in sun solaris

the above are the output from sar -r