Looking at how the VFS cache on my Linux machine behaves, I can see that even when effectively idle (crond and most other daemons stopped, interfaces down) the amount of free memory gradually increases implying that items are being evicted from the cache.I did a lot of googling but can't find any reference to how this is controlled (unless it's a side effect of vm_swappiness). Can anyone put me on the right path to understanding why items are being evicted from the cache when there is no demand for new memory allocation?
Linux cache evictions
linux;cache;vfs