Subj : memory usage
To   : comp.os.linux
From : hopehope_123
Date : Fri Jul 02 2004 09:01 am

Hi ,

My system is redhat linux advanced server 2.1 , 4 itanium 64 cpus and
8gb. ram
i use oracle 9.2.0.2

I realized that event when the dbserver is stopped . the top utility
shows more than 5gb.memory is in use. Oracle is the only application
in the server.Why does linux use this much memory? Is this committed
mem?

This is the output of /proc/meminfo  when the db is closed.
        total:    used:    free:  shared: buffers:  cached:
Mem:  8490827776 5027758080 3463069696        0 608075776 1553055744
Swap: 25165725696        0 25165725696
MemTotal:      8291824 kB
MemFree:       3381904 kB
MemShared:           0 kB
Buffers:        593824 kB
Cached:        1516656 kB
SwapCached:          0 kB
Active:         177488 kB
Inact_dirty:   1857120 kB
Inact_clean:    139040 kB
Inact_target:   434720 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      8291824 kB
LowFree:       3381904 kB
SwapTotal:    24575904 kB
SwapFree:     24575904 kB
Committed_AS: 58635728 kB
HugePages_Total:     0
HugePages_Free:      0
Hugepagesize:    262144 kB

When i start the dbserver , the output is like this:

        total:    used:    free:  shared: buffers:  cached:
Mem:  8490827776 5523128320 2967699456        0 608108544 1838022656
Swap: 25165725696        0 25165725696
MemTotal:      8291824 kB
MemFree:       2898144 kB
MemShared:           0 kB
Buffers:        593856 kB
Cached:        1794944 kB
SwapCached:          0 kB
Active:         666080 kB
Inact_dirty:   1857216 kB
Inact_clean:    139040 kB
Inact_target:   532464 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      8291824 kB
LowFree:       2898144 kB
SwapTotal:    24575904 kB
SwapFree:     24575904 kB
Committed_AS: 60628784 kB
HugePages_Total:     0
HugePages_Free:      0
Hugepagesize:    262144 kB


Kind Regards,
hope

.