The following is a demonstration of the dnlcstat command.


Here we run dnlcstat with no options. It prints a line every second,

   # dnlcstat
   dnlc  %hit      hit     miss
            0        0        0
            0        0        0
           93       95        7
           89     1920      231
           89     2130      243
           91     2358      232
           92     1476      124
           92     1953      159
           94     2416      134
           94     1962      114
           95     2113      101
           97     1969       54
           98     1489       26
           41      564      786
           40      622      913
           35      520      952
           27      937     2503
           22     1696     5806
           22      955     3281
           21     1377     5059
           31     2043     4516
           22     1423     4968
           13      550     3438
            2       95     3810
            0       58     6410
            4      223     4433
            4      198     4491
            7      339     4383

In another window, a "find /" was run. We can see the DNLC activity above,
initially there are high hit rates in the DNLC - over 90%. Eventually
the find command exhausts the DNLC, and the hit rate drops to below 10%.