ZFS Subsystem Report                            Sat Mar 15 16:23:36 2025
Linux 4.18.0-553.40.1.el8_10.x86_64                             2.1.16-1
Machine: motherbrain (x86_64)                                   2.1.16-1

ARC status:                                                      HEALTHY
        Memory throttle count:                                         0

ARC size (current):                                   100.2 %   62.7 GiB
        Target size (adaptive):                       100.0 %   62.5 GiB
        Min size (hard limit):                          6.2 %    3.9 GiB
        Max size (high water):                           16:1   62.5 GiB
        Most Frequently Used (MFU) cache size:         51.9 %   25.8 GiB
        Most Recently Used (MRU) cache size:           48.1 %   23.9 GiB
        Metadata cache size (hard limit):              75.0 %   46.9 GiB
        Metadata cache size (current):                 46.9 %   22.0 GiB
        Dnode cache size (hard limit):                 10.0 %    4.7 GiB
        Dnode cache size (current):                   106.9 %    5.0 GiB

ARC hash breakdown:
        Elements max:                                               4.6M
        Elements current:                             100.0 %       4.6M
        Collisions:                                               101.4M
        Chain max:                                                     6
        Chains:                                                   519.1k

ARC misc:
        Deleted:                                                  670.9M
        Mutex misses:                                              64.9k
        Eviction skips:                                           571.8k
        Eviction skips due to L2 writes:                               0
        L2 cached evictions:                                     0 Bytes
        L2 eligible evictions:                                  78.0 TiB
        L2 eligible MFU evictions:                     17.9 %   14.0 TiB
        L2 eligible MRU evictions:                     82.1 %   64.0 TiB
        L2 ineligible evictions:                                 4.5 TiB

ARC total accesses (hits + misses):                                 7.0G
        Cache hit ratio:                               91.3 %       6.4G
        Cache miss ratio:                               8.7 %     606.4M
        Actual hit ratio (MFU + MRU hits):             91.1 %       6.4G
        Data demand efficiency:                        92.0 %       1.1G
        Data prefetch efficiency:                       6.4 %     522.8M

Cache hits by cache type:
        Most frequently used (MFU):                    88.0 %       5.6G
        Most recently used (MRU):                      11.7 %     750.7M
        Most frequently used (MFU) ghost:               0.2 %      14.3M
        Most recently used (MRU) ghost:                 0.2 %      13.4M

Cache hits by data type:
        Demand data:                                   16.0 %       1.0G
        Prefetch data:                                  0.5 %      33.2M
        Demand metadata:                               83.4 %       5.3G
        Prefetch metadata:                              0.1 %       6.1M

Cache misses by data type:
        Demand data:                                   14.7 %      88.9M
        Prefetch data:                                 80.7 %     489.5M
        Demand metadata:                                1.6 %       9.8M
        Prefetch metadata:                              3.0 %      18.2M

DMU prefetch efficiency:                                          449.3M
        Hit ratio:                                     29.1 %     130.9M
        Miss ratio:                                    70.9 %     318.4M