Top command cache vs free memory
When I am running top command (on embedded system with 64 MB RAM) I am getting below description on total memory usage:
"Mem: 43468K used, 968K free, 0K shrd, 1280K buff, 21896K cached"
It looks like I have only 968 KB of ram free. But meanwhile I can see 21896KB in cache. Can I allocate (malloc) more than 968 from an application meantime ? If I do so, will the ram be reclaimed from cache ?
linux memory virtual-memory top
asked May 3 '13 at 10:36
Lunar MushroomsLunar Mushrooms
21329
add a comment |
When I am running top command (on embedded system with 64 MB RAM) I am getting below description on total memory usage:
"Mem: 43468K used, 968K free, 0K shrd, 1280K buff, 21896K cached"
It looks like I have only 968 KB of ram free. But meanwhile I can see 21896KB in cache. Can I allocate (malloc) more than 968 from an application meantime ? If I do so, will the ram be reclaimed from cache ?
linux memory virtual-memory top
asked May 3 '13 at 10:36
Lunar MushroomsLunar Mushrooms
21329
add a comment |
When I am running top command (on embedded system with 64 MB RAM) I am getting below description on total memory usage:
"Mem: 43468K used, 968K free, 0K shrd, 1280K buff, 21896K cached"
It looks like I have only 968 KB of ram free. But meanwhile I can see 21896KB in cache. Can I allocate (malloc) more than 968 from an application meantime ? If I do so, will the ram be reclaimed from cache ?
linux memory virtual-memory top
asked May 3 '13 at 10:36
Lunar MushroomsLunar Mushrooms
21329
When I am running top command (on embedded system with 64 MB RAM) I am getting below description on total memory usage:
"Mem: 43468K used, 968K free, 0K shrd, 1280K buff, 21896K cached"
It looks like I have only 968 KB of ram free. But meanwhile I can see 21896KB in cache. Can I allocate (malloc) more than 968 from an application meantime ? If I do so, will the ram be reclaimed from cache ?
linux memory virtual-memory top
linux memory virtual-memory top
asked May 3 '13 at 10:36
Lunar MushroomsLunar Mushrooms
21329
asked May 3 '13 at 10:36
Lunar MushroomsLunar Mushrooms
21329
asked May 3 '13 at 10:36
Lunar MushroomsLunar Mushrooms
21329
asked May 3 '13 at 10:36
Lunar MushroomsLunar Mushrooms
21329
asked May 3 '13 at 10:36
Lunar MushroomsLunar Mushrooms
21329
21329
add a comment |
add a comment |
1 Answer
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Linux will use available memory for disk caching, unless it's required by a running program.
So your you can allocate (used - cached + free) amount of memory, in your case, 43468 - 21896 + 968
answered Jun 22 '14 at 18:26
Tuo LeiTuo Lei
11
add a comment |
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1 Answer
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1 Answer
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Linux will use available memory for disk caching, unless it's required by a running program.
So your you can allocate (used - cached + free) amount of memory, in your case, 43468 - 21896 + 968
answered Jun 22 '14 at 18:26
Tuo LeiTuo Lei
11
add a comment |
Linux will use available memory for disk caching, unless it's required by a running program.
So your you can allocate (used - cached + free) amount of memory, in your case, 43468 - 21896 + 968
answered Jun 22 '14 at 18:26
Tuo LeiTuo Lei
11
add a comment |
Linux will use available memory for disk caching, unless it's required by a running program.
So your you can allocate (used - cached + free) amount of memory, in your case, 43468 - 21896 + 968
answered Jun 22 '14 at 18:26
Tuo LeiTuo Lei
11
Linux will use available memory for disk caching, unless it's required by a running program.
So your you can allocate (used - cached + free) amount of memory, in your case, 43468 - 21896 + 968
answered Jun 22 '14 at 18:26
Tuo LeiTuo Lei
11
answered Jun 22 '14 at 18:26
Tuo LeiTuo Lei
11
answered Jun 22 '14 at 18:26
Tuo LeiTuo Lei
11
answered Jun 22 '14 at 18:26
Tuo LeiTuo Lei
11
11
add a comment |
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