In the context of performance tuning, what does the 'vm.swappiness' parameter control?
- The balance between swapping out and caching application data
- The number of processes a user can start
- The kernel's version number
- The I/O scheduler used by the system
The 'vm.swappiness' parameter controls the balance between swapping out and caching application data in Linux. It determines how often the system will swap data from RAM to disk and vice versa. A lower value (e.g., 0) keeps more data in RAM, while a higher value (e.g., 100) swaps data out more aggressively.
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