[lug] Swap Space Used Despite Plenty of Memory

[Dhruva B. Reddy]

I have always wondered why 'top' shows that my system is using a little
bit of swap space, despite having plenty of physical memory (some of
which is still free, as can be seen below).  Here are the stats:

 12:29:32 up 2 days, 18:48,  7 users,  load average: 0.09, 0.04, 0.01
 109 processes: 108 sleeping, 1 running, 0 zombie, 0 stopped
 CPU states:   0.2% user,   2.0% system,   0.0% nice,  97.8% idle
 Mem:   1030304K total,  1019328K used,    10976K free,    35112K
 buffers
 Swap:  1526132K total,     4752K used,  1521380K free,   727976K cached

Any insights?

Thanks,
Dhruva