Memory on RHEL 3.0
Yard, John
jyard at ais.ucla.edu
Fri May 6 19:15:17 UTC 2005
I have 2 RHEL 3.0 systems 32 bit systems,
one has 12G of physical memory, the other has 6G.
The systems are at the same rpm levels ,
with the same app running ( Sun LDAP ),
configured identically.
Yet when I do vmstat the memory free is approximately the same .
( Also see free memory in meminfo below ). Am I running
into a 32bit memory usage limitation ? Is there a better way to
configure the system to use the 12G I have available,
even though this is 32 bit ?
Thks,
Jyard
UCLA
System 1 ( 12G ):
xxx1:/proc] # cat meminfo
total: used: free: shared: buffers: cached:
Mem: 12352049152 5887373312 6464675840 0 260145152 5239549952
Swap: 4194848768 0 4194848768
MemTotal: 12062548 kB
MemFree: 6313160 kB
MemShared: 0 kB
Buffers: 254048 kB
Cached: 5116748 kB
SwapCached: 0 kB
Active: 3759360 kB
ActiveAnon: 416024 kB
ActiveCache: 3343336 kB
Inact_dirty: 1352552 kB
Inact_laundry: 405860 kB
Inact_clean: 0 kB
Inact_target: 1103552 kB
HighTotal: 11383680 kB
HighFree: 6106256 kB
LowTotal: 678868 kB
LowFree: 206904 kB
SwapTotal: 4096532 kB
SwapFree: 4096532 kB
Committed_AS: 1553328 kB
HugePages_Total: 0
HugePages_Free: 0
Hugepagesize: 2048 kB
xxx1:/proc] # vmstat 1 5
procs memory swap io system
cpu
r b swpd free buff cache si so bi bo in cs us sy
wa id
0 0 0 6313204 254048 5116804 0 0 0 2 4 3 0
1 0 1
0 0 0 6313204 254048 5116804 0 0 0 0 321 271 0
0 0 100
System2 ( ^G ) ;
xxx2:/proc] # cat meminfo
total: used: free: shared: buffers: cached:
Mem: 6305636352 326402048 5979234304 0 65183744 144285696
Swap: 4194848768 0 4194848768
MemTotal: 6157848 kB
MemFree: 5839096 kB
MemShared: 0 kB
Buffers: 63656 kB
Cached: 140904 kB
SwapCached: 0 kB
Active: 195000 kB
ActiveAnon: 47468 kB
ActiveCache: 147532 kB
Inact_dirty: 42988 kB
Inact_laundry: 13180 kB
Inact_clean: 0 kB
Inact_target: 50232 kB
HighTotal: 5373696 kB
HighFree: 5175996 kB
LowTotal: 784152 kB
LowFree: 663100 kB
SwapTotal: 4096532 kB
SwapFree: 4096532 kB
Committed_AS: 1208816 kB
HugePages_Total: 0
HugePages_Free: 0
Hugepagesize: 2048 kB
[xxx2:/proc] # vmstat 1 4
procs memory swap io system
cpu
r b swpd free buff cache si so bi bo in cs us sy
wa id
0 0 0 5838912 63704 140904 0 0 40 16 49 48 2
0 2 96
0 0 0 5838912 63704 140904 0 0 0 0 193 164 0
0 0 100
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