Looks like mmaped files.
2011/7/15 Donna Li <donna.li@utstar.com>
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> All:****
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> I download JNA jar and put it to cassandra lib directory. When restart
> cassandra server, I found the physical memory highly increase. There is no
> data saved in cassandra, why so much memory used by cassandra? How can I
> decrease the memory usage by cassandra? My version is 0.7.6-2.****
>
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> Before ****
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> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND ****
>
> 11381 root 25 0 **653m** **57m** 6272 S 0 5.7 0:02.33
> java ****
>
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> After****
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> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND ****
>
> 11130 root 25 0 **653m** **647m** **9.9m** S 0 64.2 0:03.57
> java ****
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> Best Regards****
>
> Donna li****
>
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