Always 99-100% memory in RHEL AS 3.0

sathyguy · 09-24-2007, 03:11 AM

Friends,

OS: RHEL AS 3.0
DB: 9iR2

Our server is HP ML-570. I am always seeing the memory usage is between 99-100%.
We have installed only RHEL AS 3.0 and oracle 9iR2 database in our server. We haven't installed any other in this server.
is this 99-100% normal?
what im suppose to do?

Thanks

acid_kewpie · 09-24-2007, 04:45 AM

more detail would be the norm here... e.g. the output of "free", but in general this would probably be the full memory model that linux uses. if you're not usign a lot of swap too, then it's just linux doing it's job correctly.

sathyguy · 10-03-2007, 03:41 AM

here it is....

Code:

[oracle@proddb oracle]$ free -t -m
             total       used       free     shared    buffers     cached
Mem:          2013       1991         22          0         67       1223
-/+ buffers/cache:        699       1313
Swap:         4095          0       4095
Total:        6109       1991       4118
[oracle@proddb oracle]$ cat /proc/meminfo
        total:    used:    free:  shared: buffers:  cached:
Mem:  2111123456 2092486656 18636800        0 71565312 1281282048
Swap: 4294868992        0 4294868992
MemTotal:      2061644 kB
MemFree:         18200 kB
MemShared:           0 kB
Buffers:         69888 kB
Cached:        1251252 kB
SwapCached:          0 kB
Active:        1246724 kB
ActiveAnon:     766100 kB
ActiveCache:    480624 kB
Inact_dirty:     13752 kB
Inact_laundry:  253780 kB
Inact_clean:     34428 kB
Inact_target:   309736 kB
HighTotal:     1179616 kB
HighFree:         1424 kB
LowTotal:       882028 kB
LowFree:         16776 kB
SwapTotal:     4194208 kB
SwapFree:      4194208 kB
HugePages_Total:     0
HugePages_Free:      0
Hugepagesize:     2048 kB
[oracle@proddb oracle]$

thanks

acid_kewpie · 10-03-2007, 04:08 AM

ok, so of the 1991mb in use, 699mb is live data, 1313 is old cached data that might be needed again. clearly you're also using no swap at all, so nothing is having any issues acquiring direct memory.

sathyguy · 10-03-2007, 05:05 AM

so, no need to change anything?
then, why this memory is always showing between 99% to 100% in the graphical mode?
thats why i posted this question.

thanks

acid_kewpie · 10-03-2007, 07:10 AM

it's perfectly fine. it's 99 to 100% becuase memory usage *IS* 99 to 100%... i suggest you reaserch the linux full memory model if you wish to learn more about this.

rmitev · 10-07-2007, 06:55 AM

you have 1223MB cached data in memory ... that's good ... this accelerates hdd access, and ... this memory can be free if your system needs free memory

your free result looks perfect for me ...