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 -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list