meminfo

[gwichman]

Just to confirm what i believe to be correct, can someone look at the below and tell me how much memory is available to a process on this system if i start one? If you can explain why that might be helpful too..

Thanks

[root@ps-db-poly3u-01 root]# free
total used free shared buffers cached
Mem: 8258764 8231388 27376 0 376008 5315592
-/+ buffers/cache: 2539788 5718976
Swap: 4096564 20396 4076168
[root@ps-db-poly3u-01 root]# cat /proc/meminfo
total: used: free: shared: buffers: cached:
Mem: 8456974336 8428941312 28033024 0 385056768 5464051712
Swap: 4194881536 20885504 4173996032
MemTotal: 8258764 kB
MemFree: 27376 kB
MemShared: 0 kB
Buffers: 376032 kB
Cached: 5315592 kB
SwapCached: 20396 kB
Active: 2831184 kB
ActiveAnon: 2336488 kB
ActiveCache: 494696 kB
Inact_dirty: 2493552 kB
Inact_laundry: 2526852 kB
Inact_clean: 176532 kB
Inact_target: 1605624 kB
HighTotal: 7470528 kB
HighFree: 1024 kB
LowTotal: 788236 kB
LowFree: 26352 kB
SwapTotal: 4096564 kB
SwapFree: 4076168 kB

 

[comtec17]

27 Meg of RAM with 4.076 GB of swap

 

[thedaver]

Incorrect, the kernel has been caching your drive contents into memory as well (see Cached). This value is 500+MB

The kernel reduces the amount of mem cache when you fire up applications, but it will rarely purge the entire cache - particularly on a file-active box.

Therefore, the answer is..... it depends. However, you have SIGNIFICANTLY MORE than 27MB of RAM available for running an app. My guess is that the kernel would surrender 100-200MB of RAM if things balanced well.

This is always like asking "which retirement plan is best for me".... it depends on MANY factors and you'll never really get a precise answer.

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