Swap Utilization: System Level Versus Individual Process

Posted by Max on Ask Ubuntu See other posts from Ask Ubuntu or by Max
Published on 2011-03-02T01:53:22Z Indexed on 2011/03/02 7:32 UTC
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On my top output, at header level, swap is showing 0k used. But on each individual process the SWAP is shown as a non-zero value (output column enabled with option p). What does this mean?

Swap:  4870140k total,        0k used,  4870140k free,   571300k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  SWAP COMMAND      
 2448 max       20   0  323m  87m  27m S    0  4.4   1:23.31 236m chrome  

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