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I have also noticed the following unfair bufcache assignment to filesystems:

Could the poor performance of ioflush be due to this memory assignment?
Because the program is working on /mnt/data partition.

There are  34053 metadata buffers using             58972 kBytes of memory.
There are 714051 pages for cached file data using 2856204 kBytes of memory.
There are   1397 pages for executables using         5588 kBytes of memory.

File System          Bufs used   %   kB in use   %  Bufsize kB   %  Util %
/usr                     33570  98       55453  94       55593  94     100
/                          320   0         879   1         885   2      99
/mnt/data                  162   0        2474   4        2478   4     100

Total:                   34052  99       58806 100       58956 100     100

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