Hello guys,
I get a new intel 900P
So I am wondering whether I should add it to the current pool’s L2ARC or add it as a new pool to host VMs or some apps
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ZFS Subsystem Report Mon Aug 11 20:34:21 2025
Linux 6.6.44-production+truenas 2.2.99-1
Machine: truenas (x86_64) 2.2.99-1
ARC status:
Total memory size: 62.7 GiB
Min target size: 3.1 % 2.0 GiB
Max target size: 98.4 % 61.7 GiB
Target size (adaptive): 88.2 % 54.6 GiB
Current size: 88.2 % 54.5 GiB
Free memory size: 2.9 GiB
Available memory size: 753.2 MiB
ARC structural breakdown (current size): 54.5 GiB
Compressed size: 95.8 % 52.2 GiB
Overhead size: 3.3 % 1.8 GiB
Bonus size: 0.1 % 43.4 MiB
Dnode size: 0.3 % 148.5 MiB
Dbuf size: 0.1 % 83.5 MiB
Header size: 0.4 % 211.3 MiB
L2 header size: 0.0 % 0 Bytes
ABD chunk waste size: < 0.1 % 10.9 MiB
ARC types breakdown (compressed + overhead): 54.0 GiB
Data size: 92.8 % 50.1 GiB
Metadata size: 7.2 % 3.9 GiB
ARC states breakdown (compressed + overhead): 54.0 GiB
Anonymous data size: < 0.1 % 1.1 MiB
Anonymous metadata size: 0.1 % 57.4 MiB
MFU data target: 37.5 % 20.2 GiB
MFU data size: 2.1 % 1.1 GiB
MFU evictable data size: 1.5 % 815.4 MiB
MFU ghost data size: 0 Bytes
MFU metadata target: 12.5 % 6.7 GiB
MFU metadata size: 1.0 % 571.5 MiB
MFU evictable metadata size: 0.7 % 401.1 MiB
MFU ghost metadata size: 0 Bytes
MRU data target: 37.5 % 20.2 GiB
MRU data size: 90.7 % 49.0 GiB
MRU evictable data size: 86.1 % 46.5 GiB
MRU ghost data size: 2.5 GiB
MRU metadata target: 12.5 % 6.7 GiB
MRU metadata size: 6.1 % 3.3 GiB
MRU evictable metadata size: 5.8 % 3.1 GiB
MRU ghost metadata size: 0 Bytes
Uncached data size: 0.0 % 0 Bytes
Uncached metadata size: 0.0 % 0 Bytes
ARC hash breakdown:
Elements max: 853.9k
Elements current: 100.0 % 853.9k
Collisions: 5.7M
Chain max: 5
Chains: 40.3k
ARC misc:
Memory throttles: 0
Memory direct reclaims: 0
Memory indirect reclaims: 0
Deleted: 72.7M
Mutex misses: 2.3k
Eviction skips: 9.5k
Eviction skips due to L2 writes: 0
L2 cached evictions: 0 Bytes
L2 eligible evictions: 8.7 TiB
L2 eligible MFU evictions: < 0.1 % 96.0 KiB
L2 eligible MRU evictions: 100.0 % 8.7 TiB
L2 ineligible evictions: 396.9 MiB
ARC total accesses: 177.4M
Total hits: 95.2 % 168.8M
Total I/O hits: < 0.1 % 69.8k
Total misses: 4.8 % 8.5M
ARC demand data accesses: 20.2 % 35.8M
Demand data hits: 99.3 % 35.6M
Demand data I/O hits: 0.2 % 57.3k
Demand data misses: 0.6 % 210.8k
ARC demand metadata accesses: 75.1 % 133.3M
Demand metadata hits: 100.0 % 133.2M
Demand metadata I/O hits: < 0.1 % 1.0k
Demand metadata misses: < 0.1 % 34.0k
ARC prefetch data accesses: 4.6 % 8.2M
Prefetch data hits: < 0.1 % 2.9k
Prefetch data I/O hits: < 0.1 % 248
Prefetch data misses: 100.0 % 8.2M
ARC prefetch metadata accesses: < 0.1 % 72.1k
Prefetch metadata hits: 37.2 % 26.8k
Prefetch metadata I/O hits: 15.5 % 11.2k
Prefetch metadata misses: 47.2 % 34.1k
ARC predictive prefetches: 100.0 % 8.3M
Demand hits after predictive: 98.8 % 8.2M
Demand I/O hits after predictive: 0.7 % 57.9k
Never demanded after predictive: 0.5 % 41.8k
ARC prescient prefetches: < 0.1 % 105
Demand hits after prescient: 73.3 % 77
Demand I/O hits after prescient: 26.7 % 28
Never demanded after prescient: 0.0 % 0
ARC states hits of all accesses:
Most frequently used (MFU): 86.6 % 153.6M
Most recently used (MRU): 8.6 % 15.2M
Most frequently used (MFU) ghost: 0.0 % 0
Most recently used (MRU) ghost: < 0.1 % 105
Uncached: 0.0 % 0
DMU predictive prefetcher calls: 16.8M
Stream hits: 15.7 % 2.6M
Hits ahead of stream: 13.9 % 2.3M
Hits behind stream: 18.2 % 3.1M
Stream misses: 52.1 % 8.7M
Streams limit reached: 1.4 % 121.9k
Stream strides: 126.1k
Prefetches issued 8.3M
L2ARC not detected, skipping section
Solaris Porting Layer (SPL):
spl_hostid 0
spl_hostid_path /etc/hostid
spl_kmem_alloc_max 16777216
spl_kmem_alloc_warn 65536
spl_kmem_cache_kmem_threads 4
spl_kmem_cache_magazine_size 0
spl_kmem_cache_max_size 32
spl_kmem_cache_obj_per_slab 8
spl_kmem_cache_slab_limit 16384
spl_panic_halt 1
spl_schedule_hrtimeout_slack_us 0
spl_taskq_kick 0
spl_taskq_thread_bind 0
spl_taskq_thread_dynamic 1
spl_taskq_thread_priority 1
spl_taskq_thread_sequential 4
spl_taskq_thread_timeout_ms 5000
Tunables:
brt_zap_default_bs 12
brt_zap_default_ibs 12
brt_zap_prefetch 1
dbuf_cache_hiwater_pct 10
dbuf_cache_lowater_pct 10
dbuf_cache_max_bytes 18446744073709551615
dbuf_cache_shift 5
dbuf_metadata_cache_max_bytes 18446744073709551615
dbuf_metadata_cache_shift 6
dbuf_mutex_cache_shift 0
ddt_zap_default_bs 15
ddt_zap_default_ibs 15
dmu_ddt_copies 0
dmu_object_alloc_chunk_shift 7
dmu_prefetch_max 134217728
icp_aes_impl cycle [fastest] generic x86_64 aesni
icp_gcm_avx_chunk_size 32736
icp_gcm_impl cycle [fastest] avx generic pclmulqdq
ignore_hole_birth 1
l2arc_exclude_special 0
l2arc_feed_again 1
l2arc_feed_min_ms 200
l2arc_feed_secs 1
l2arc_headroom 8
l2arc_headroom_boost 200
l2arc_meta_percent 33
l2arc_mfuonly 0
l2arc_noprefetch 1
l2arc_norw 0
l2arc_rebuild_blocks_min_l2size 1073741824
l2arc_rebuild_enabled 1
l2arc_trim_ahead 0
l2arc_write_boost 33554432
l2arc_write_max 33554432
metaslab_aliquot 1048576
metaslab_bias_enabled 1
metaslab_debug_load 0
metaslab_debug_unload 0
metaslab_df_max_search 16777216
metaslab_df_use_largest_segment 0
metaslab_force_ganging 16777217
metaslab_force_ganging_pct 3
metaslab_fragmentation_factor_enabled 1
metaslab_lba_weighting_enabled 1
metaslab_preload_enabled 1
metaslab_preload_limit 10
metaslab_preload_pct 50
metaslab_unload_delay 32
metaslab_unload_delay_ms 600000
raidz_expand_max_copy_bytes 167772160
raidz_expand_max_reflow_bytes 0
raidz_io_aggregate_rows 4
send_holes_without_birth_time 1
spa_asize_inflation 24
spa_config_path /etc/zfs/zpool.cache
spa_cpus_per_allocator 4
spa_load_print_vdev_tree 0
spa_load_verify_data 1
spa_load_verify_metadata 1
spa_load_verify_shift 4
spa_num_allocators 4
spa_slop_shift 5
spa_upgrade_errlog_limit 0
vdev_file_logical_ashift 9
vdev_file_physical_ashift 9
vdev_removal_max_span 32768
vdev_validate_skip 0
zap_iterate_prefetch 1
zap_micro_max_size 131072
zap_shrink_enabled 1
zfetch_hole_shift 2
zfetch_max_distance 67108864
zfetch_max_idistance 67108864
zfetch_max_reorder 16777216
zfetch_max_sec_reap 2
zfetch_max_streams 8
zfetch_min_distance 4194304
zfetch_min_sec_reap 1
zfs_abd_scatter_enabled 1
zfs_abd_scatter_max_order 13
zfs_abd_scatter_min_size 1536
zfs_active_allocator dynamic
zfs_admin_snapshot 0
zfs_allow_redacted_dataset_mount 0
zfs_arc_average_blocksize 8192
zfs_arc_dnode_limit 0
zfs_arc_dnode_limit_percent 10
zfs_arc_dnode_reduce_percent 10
zfs_arc_evict_batch_limit 10
zfs_arc_eviction_pct 200
zfs_arc_grow_retry 0
zfs_arc_lotsfree_percent 10
zfs_arc_max 0
zfs_arc_meta_balance 500
zfs_arc_min 0
zfs_arc_min_prefetch_ms 0
zfs_arc_min_prescient_prefetch_ms 0
zfs_arc_pc_percent 300
zfs_arc_prune_task_threads 1
zfs_arc_shrink_shift 0
zfs_arc_shrinker_limit 0
zfs_arc_shrinker_seeks 2
zfs_arc_sys_free 0
zfs_async_block_max_blocks 18446744073709551615
zfs_autoimport_disable 1
zfs_bclone_enabled 1
zfs_bclone_wait_dirty 0
zfs_blake3_impl cycle [fastest] generic sse2 sse41 avx2
zfs_btree_verify_intensity 0
zfs_checksum_events_per_second 20
zfs_commit_timeout_pct 10
zfs_compressed_arc_enabled 1
zfs_condense_indirect_commit_entry_delay_ms 0
zfs_condense_indirect_obsolete_pct 25
zfs_condense_indirect_vdevs_enable 1
zfs_condense_max_obsolete_bytes 1073741824
zfs_condense_min_mapping_bytes 131072
zfs_dbgmsg_enable 1
zfs_dbgmsg_maxsize 4194304
zfs_dbuf_state_index 0
zfs_ddt_data_is_special 1
zfs_deadman_checktime_ms 60000
zfs_deadman_enabled 1
zfs_deadman_events_per_second 1
zfs_deadman_failmode wait
zfs_deadman_synctime_ms 600000
zfs_deadman_ziotime_ms 300000
zfs_dedup_log_flush_entries_min 1000
zfs_dedup_log_flush_flow_rate_txgs 10
zfs_dedup_log_flush_min_time_ms 1000
zfs_dedup_log_flush_passes_max 8
zfs_dedup_log_mem_max 673470464
zfs_dedup_log_mem_max_percent 1
zfs_dedup_log_txg_max 8
zfs_dedup_prefetch 0
zfs_default_bs 9
zfs_default_ibs 15
zfs_delay_min_dirty_percent 60
zfs_delay_scale 500000
zfs_delete_blocks 20480
zfs_dirty_data_max 4294967296
zfs_dirty_data_max_max 4294967296
zfs_dirty_data_max_max_percent 25
zfs_dirty_data_max_percent 10
zfs_dirty_data_sync_percent 20
zfs_disable_ivset_guid_check 0
zfs_dmu_offset_next_sync 1
zfs_embedded_slog_min_ms 64
zfs_expire_snapshot 300
zfs_fallocate_reserve_percent 110
zfs_flags 0
zfs_fletcher_4_impl [fastest] scalar superscalar superscalar4 sse2 ssse3 avx2
zfs_free_bpobj_enabled 1
zfs_free_leak_on_eio 0
zfs_free_min_time_ms 1000
zfs_history_output_max 1048576
zfs_immediate_write_sz 32768
zfs_initialize_chunk_size 1048576
zfs_initialize_value 16045690984833335022
zfs_keep_log_spacemaps_at_export 0
zfs_key_max_salt_uses 400000000
zfs_livelist_condense_new_alloc 0
zfs_livelist_condense_sync_cancel 0
zfs_livelist_condense_sync_pause 0
zfs_livelist_condense_zthr_cancel 0
zfs_livelist_condense_zthr_pause 0
zfs_livelist_max_entries 500000
zfs_livelist_min_percent_shared 75
zfs_lua_max_instrlimit 100000000
zfs_lua_max_memlimit 104857600
zfs_max_async_dedup_frees 100000
zfs_max_dataset_nesting 50
zfs_max_log_walking 5
zfs_max_logsm_summary_length 10
zfs_max_missing_tvds 0
zfs_max_nvlist_src_size 0
zfs_max_recordsize 16777216
zfs_metaslab_find_max_tries 100
zfs_metaslab_fragmentation_threshold 70
zfs_metaslab_max_size_cache_sec 3600
zfs_metaslab_mem_limit 25
zfs_metaslab_segment_weight_enabled 1
zfs_metaslab_switch_threshold 2
zfs_metaslab_try_hard_before_gang 0
zfs_mg_fragmentation_threshold 95
zfs_mg_noalloc_threshold 0
zfs_min_metaslabs_to_flush 1
zfs_multihost_fail_intervals 10
zfs_multihost_history 0
zfs_multihost_import_intervals 20
zfs_multihost_interval 1000
zfs_multilist_num_sublists 0
zfs_no_scrub_io 0
zfs_no_scrub_prefetch 0
zfs_nocacheflush 0
zfs_nopwrite_enabled 1
zfs_object_mutex_size 64
zfs_obsolete_min_time_ms 500
zfs_override_estimate_recordsize 0
zfs_pd_bytes_max 52428800
zfs_per_txg_dirty_frees_percent 30
zfs_prefetch_disable 0
zfs_read_history 0
zfs_read_history_hits 0
zfs_rebuild_max_segment 1048576
zfs_rebuild_scrub_enabled 1
zfs_rebuild_vdev_limit 67108864
zfs_reconstruct_indirect_combinations_max 4096
zfs_recover 0
zfs_recv_best_effort_corrective 0
zfs_recv_queue_ff 20
zfs_recv_queue_length 16777216
zfs_recv_write_batch_size 1048576
zfs_removal_ignore_errors 0
zfs_removal_suspend_progress 0
zfs_remove_max_segment 16777216
zfs_resilver_disable_defer 0
zfs_resilver_min_time_ms 3000
zfs_scan_blkstats 0
zfs_scan_checkpoint_intval 7200
zfs_scan_fill_weight 3
zfs_scan_ignore_errors 0
zfs_scan_issue_strategy 0
zfs_scan_legacy 0
zfs_scan_max_ext_gap 2097152
zfs_scan_mem_lim_fact 20
zfs_scan_mem_lim_soft_fact 20
zfs_scan_report_txgs 0
zfs_scan_strict_mem_lim 0
zfs_scan_suspend_progress 0
zfs_scan_vdev_limit 16777216
zfs_scrub_after_expand 1
zfs_scrub_error_blocks_per_txg 4096
zfs_scrub_min_time_ms 1000
zfs_send_corrupt_data 0
zfs_send_no_prefetch_queue_ff 20
zfs_send_no_prefetch_queue_length 1048576
zfs_send_queue_ff 20
zfs_send_queue_length 16777216
zfs_send_unmodified_spill_blocks 1
zfs_sha256_impl cycle [fastest] generic x64 ssse3 avx avx2
zfs_sha512_impl cycle [fastest] generic x64 avx avx2
zfs_slow_io_events_per_second 20
zfs_snapshot_history_enabled 1
zfs_spa_discard_memory_limit 16777216
zfs_special_class_metadata_reserve_pct 25
zfs_sync_pass_deferred_free 2
zfs_sync_pass_dont_compress 8
zfs_sync_pass_rewrite 2
zfs_traverse_indirect_prefetch_limit 32
zfs_trim_extent_bytes_max 134217728
zfs_trim_extent_bytes_min 32768
zfs_trim_metaslab_skip 0
zfs_trim_queue_limit 10
zfs_trim_txg_batch 32
zfs_txg_history 100
zfs_txg_timeout 5
zfs_unflushed_log_block_max 131072
zfs_unflushed_log_block_min 1000
zfs_unflushed_log_block_pct 400
zfs_unflushed_log_txg_max 1000
zfs_unflushed_max_mem_amt 1073741824
zfs_unflushed_max_mem_ppm 1000
zfs_unlink_suspend_progress 0
zfs_user_indirect_is_special 1
zfs_vdev_aggregation_limit 1048576
zfs_vdev_aggregation_limit_non_rotating 131072
zfs_vdev_async_read_max_active 3
zfs_vdev_async_read_min_active 1
zfs_vdev_async_write_active_max_dirty_percent 60
zfs_vdev_async_write_active_min_dirty_percent 30
zfs_vdev_async_write_max_active 10
zfs_vdev_async_write_min_active 2
zfs_vdev_def_queue_depth 32
zfs_vdev_default_ms_count 200
zfs_vdev_default_ms_shift 29
zfs_vdev_disk_classic 0
zfs_vdev_disk_max_segs 0
zfs_vdev_failfast_mask 1
zfs_vdev_initializing_max_active 1
zfs_vdev_initializing_min_active 1
zfs_vdev_max_active 1000
zfs_vdev_max_auto_ashift 14
zfs_vdev_max_ms_shift 34
zfs_vdev_min_auto_ashift 9
zfs_vdev_min_ms_count 16
zfs_vdev_mirror_non_rotating_inc 0
zfs_vdev_mirror_non_rotating_seek_inc 1
zfs_vdev_mirror_rotating_inc 0
zfs_vdev_mirror_rotating_seek_inc 5
zfs_vdev_mirror_rotating_seek_offset 1048576
zfs_vdev_ms_count_limit 131072
zfs_vdev_nia_credit 5
zfs_vdev_nia_delay 5
zfs_vdev_open_timeout_ms 1000
zfs_vdev_queue_depth_pct 1000
zfs_vdev_raidz_impl cycle [fastest] original scalar sse2 ssse3 avx2
zfs_vdev_read_gap_limit 32768
zfs_vdev_rebuild_max_active 3
zfs_vdev_rebuild_min_active 1
zfs_vdev_removal_max_active 2
zfs_vdev_removal_min_active 1
zfs_vdev_scheduler unused
zfs_vdev_scrub_max_active 3
zfs_vdev_scrub_min_active 1
zfs_vdev_sync_read_max_active 10
zfs_vdev_sync_read_min_active 10
zfs_vdev_sync_write_max_active 10
zfs_vdev_sync_write_min_active 10
zfs_vdev_trim_max_active 2
zfs_vdev_trim_min_active 1
zfs_vdev_write_gap_limit 4096
zfs_vnops_read_chunk_size 1048576
zfs_wrlog_data_max 8589934592
zfs_xattr_compat 0
zfs_zevent_len_max 512
zfs_zevent_retain_expire_secs 900
zfs_zevent_retain_max 2000
zfs_zil_clean_taskq_maxalloc 1048576
zfs_zil_clean_taskq_minalloc 1024
zfs_zil_clean_taskq_nthr_pct 100
zfs_zil_saxattr 1
zil_maxblocksize 131072
zil_maxcopied 7680
zil_nocacheflush 0
zil_replay_disable 0
zil_slog_bulk 67108864
zio_deadman_log_all 0
zio_dva_throttle_enabled 1
zio_requeue_io_start_cut_in_line 1
zio_slow_io_ms 30000
zio_taskq_batch_pct 80
zio_taskq_batch_tpq 0
zio_taskq_read fixed,1,8 null scale null
zio_taskq_write sync null scale null
zio_taskq_write_tpq 16
zstd_abort_size 131072
zstd_earlyabort_pass 1
zvol_blk_mq_blocks_per_thread 8
zvol_blk_mq_queue_depth 128
zvol_enforce_quotas 1
zvol_inhibit_dev 0
zvol_major 230
zvol_max_discard_blocks 16384
zvol_num_taskqs 0
zvol_open_timeout_ms 1000
zvol_prefetch_bytes 131072
zvol_request_sync 0
zvol_threads 0
zvol_use_blk_mq 0
zvol_volmode 2
ZIL committed transactions: 470.6k
Commit requests: 93.6k
Flushes to stable storage: 93.6k
Transactions to SLOG storage pool: 0 Bytes 0
Transactions to non-SLOG storage pool: 1.6 GiB 98.8k
