Attachment 182943 Details for Bug 219457 – output of "zfs-stats -a" when ARC reaches minimum (w/o swap)

output of "zfs-stats -a" when ARC reaches minimum (w/o swap)

zfs-stats.txt (text/plain), 9.79 KB, created by Anton Saietskii on 2017-05-26 21:10:04 UTC

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Creator: Anton Saietskii

Created: 2017-05-26 21:10:04 UTC

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obsolete

>
>------------------------------------------------------------------------
>ZFS Subsystem Report				Sat May 27 00:00:51 2017
>------------------------------------------------------------------------
>
>System Information:
>
>	Kernel Version:				1003000 (osreldate)
>	Hardware Platform:			amd64
>	Processor Architecture:			amd64
>
>	ZFS Storage pool Version:		5000
>	ZFS Filesystem Version:			5
>
>FreeBSD 10.3-RELEASE-p19 #0 r318512M: Sat May 20 03:05:22 MSK 2017 root
> 0:00  up 23:08, 5 users, load averages: 0,85 0,52 0,46
>
>------------------------------------------------------------------------
>
>System Memory:
>
>	0.01%	15.67	MiB Active,	0.28%	713.62	MiB Inact
>	78.57%	195.95	GiB Wired,	0.00%	0 Cache
>	21.14%	52.73	GiB Free,	0.00%	0 Gap
>
>	Real Installed:				256.00	GiB
>	Real Available:			99.98%	255.96	GiB
>	Real Managed:			97.43%	249.39	GiB
>
>	Logical Total:				256.00	GiB
>	Logical Used:			79.13%	202.58	GiB
>	Logical Free:			20.87%	53.42	GiB
>
>Kernel Memory:					1.34	GiB
>	Data:				99.10%	1.33	GiB
>	Text:				0.90%	12.27	MiB
>
>Kernel Memory Map:				249.39	GiB
>	Size:				77.06%	192.19	GiB
>	Free:				22.94%	57.20	GiB
>
>------------------------------------------------------------------------
>
>ARC Summary: (HEALTHY)
>	Memory Throttle Count:			0
>
>ARC Misc:
>	Deleted:				1.85m
>	Recycle Misses:				0
>	Mutex Misses:				93
>	Evict Skips:				311
>
>ARC Size:				77.30%	192.01	GiB
>	Target Size: (Adaptive)		77.30%	192.00	GiB
>	Min Size (Hard Limit):		77.30%	192.00	GiB
>	Max Size (High Water):		1:1	248.39	GiB
>
>ARC Size Breakdown:
>	Recently Used Cache Size:	38.33%	73.60	GiB
>	Frequently Used Cache Size:	61.67%	118.41	GiB
>
>ARC Hash Breakdown:
>	Elements Max:				2.20m
>	Elements Current:		100.00%	2.20m
>	Collisions:				185.20k
>	Chain Max:				4
>	Chains:					69.00k
>
>------------------------------------------------------------------------
>
>ARC Efficiency:					52.95m
>	Cache Hit Ratio:		31.59%	16.73m
>	Cache Miss Ratio:		68.41%	36.22m
>	Actual Hit Ratio:		31.44%	16.64m
>
>	Data Demand Efficiency:		82.68%	15.81m
>
>	CACHE HITS BY CACHE LIST:
>	  Most Recently Used:		57.04%	9.54m
>	  Most Frequently Used:		42.47%	7.10m
>	  Most Recently Used Ghost:	0.54%	89.95k
>	  Most Frequently Used Ghost:	0.50%	82.81k
>
>	CACHE HITS BY DATA TYPE:
>	  Demand Data:			78.15%	13.07m
>	  Prefetch Data:		0.00%	0
>	  Demand Metadata:		21.36%	3.57m
>	  Prefetch Metadata:		0.49%	82.11k
>
>	CACHE MISSES BY DATA TYPE:
>	  Demand Data:			7.56%	2.74m
>	  Prefetch Data:		0.00%	0
>	  Demand Metadata:		92.37%	33.46m
>	  Prefetch Metadata:		0.07%	26.68k
>
>------------------------------------------------------------------------
>
>L2 ARC Summary: (HEALTHY)
>	Passed Headroom:			160.51k
>	Tried Lock Failures:			10.55k
>	IO In Progress:				0
>	Low Memory Aborts:			7
>	Free on Write:				41
>	Writes While Full:			8.60k
>	R/W Clashes:				0
>	Bad Checksums:				0
>	IO Errors:				0
>	SPA Mismatch:				120.84m
>
>L2 ARC Size: (Adaptive)				1.10	TiB
>	Header Size:			0.01%	146.84	MiB
>
>L2 ARC Breakdown:				36.22m
>	Hit Ratio:			0.78%	281.10k
>	Miss Ratio:			99.22%	35.94m
>	Feeds:					90.39k
>
>L2 ARC Buffer:
>	Bytes Scanned:				95.61	TiB
>	Buffer Iterations:			90.39k
>	List Iterations:			359.19k
>	NULL List Iterations:			2
>
>L2 ARC Writes:
>	Writes Sent:			100.00%	51.56k
>
>------------------------------------------------------------------------
>
>
>------------------------------------------------------------------------
>
>VDEV cache is disabled
>
>------------------------------------------------------------------------
>
>ZFS Tunables (sysctl):
>	kern.maxusers                           16717
>	vm.kmem_size                            267778719744
>	vm.kmem_size_scale                      1
>	vm.kmem_size_min                        0
>	vm.kmem_size_max                        1319413950874
>	vfs.zfs.trim.max_interval               1
>	vfs.zfs.trim.timeout                    30
>	vfs.zfs.trim.txg_delay                  32
>	vfs.zfs.trim.enabled                    0
>	vfs.zfs.vol.unmap_enabled               1
>	vfs.zfs.vol.mode                        1
>	vfs.zfs.version.zpl                     5
>	vfs.zfs.version.spa                     5000
>	vfs.zfs.version.acl                     1
>	vfs.zfs.version.ioctl                   5
>	vfs.zfs.debug                           0
>	vfs.zfs.super_owner                     0
>	vfs.zfs.sync_pass_rewrite               2
>	vfs.zfs.sync_pass_dont_compress         5
>	vfs.zfs.sync_pass_deferred_free         2
>	vfs.zfs.zio.exclude_metadata            0
>	vfs.zfs.zio.use_uma                     1
>	vfs.zfs.cache_flush_disable             0
>	vfs.zfs.zil_replay_disable              0
>	vfs.zfs.min_auto_ashift                 12
>	vfs.zfs.max_auto_ashift                 13
>	vfs.zfs.vdev.trim_max_pending           10000
>	vfs.zfs.vdev.bio_delete_disable         0
>	vfs.zfs.vdev.bio_flush_disable          0
>	vfs.zfs.vdev.write_gap_limit            4096
>	vfs.zfs.vdev.read_gap_limit             32768
>	vfs.zfs.vdev.aggregation_limit          131072
>	vfs.zfs.vdev.trim_max_active            64
>	vfs.zfs.vdev.trim_min_active            1
>	vfs.zfs.vdev.scrub_max_active           2
>	vfs.zfs.vdev.scrub_min_active           1
>	vfs.zfs.vdev.async_write_max_active     10
>	vfs.zfs.vdev.async_write_min_active     1
>	vfs.zfs.vdev.async_read_max_active      3
>	vfs.zfs.vdev.async_read_min_active      1
>	vfs.zfs.vdev.sync_write_max_active      10
>	vfs.zfs.vdev.sync_write_min_active      10
>	vfs.zfs.vdev.sync_read_max_active       10
>	vfs.zfs.vdev.sync_read_min_active       10
>	vfs.zfs.vdev.max_active                 1000
>	vfs.zfs.vdev.async_write_active_max_dirty_percent60
>	vfs.zfs.vdev.async_write_active_min_dirty_percent30
>	vfs.zfs.vdev.mirror.non_rotating_seek_inc1
>	vfs.zfs.vdev.mirror.non_rotating_inc    0
>	vfs.zfs.vdev.mirror.rotating_seek_offset1048576
>	vfs.zfs.vdev.mirror.rotating_seek_inc   5
>	vfs.zfs.vdev.mirror.rotating_inc        0
>	vfs.zfs.vdev.trim_on_init               1
>	vfs.zfs.vdev.cache.bshift               16
>	vfs.zfs.vdev.cache.size                 0
>	vfs.zfs.vdev.cache.max                  16384
>	vfs.zfs.vdev.metaslabs_per_vdev         200
>	vfs.zfs.txg.timeout                     10
>	vfs.zfs.space_map_blksz                 4096
>	vfs.zfs.spa_slop_shift                  5
>	vfs.zfs.spa_asize_inflation             24
>	vfs.zfs.deadman_enabled                 1
>	vfs.zfs.deadman_checktime_ms            5000
>	vfs.zfs.deadman_synctime_ms             1000000
>	vfs.zfs.recover                         0
>	vfs.zfs.spa_load_verify_data            1
>	vfs.zfs.spa_load_verify_metadata        1
>	vfs.zfs.spa_load_verify_maxinflight     10000
>	vfs.zfs.check_hostid                    1
>	vfs.zfs.mg_fragmentation_threshold      85
>	vfs.zfs.mg_noalloc_threshold            0
>	vfs.zfs.condense_pct                    200
>	vfs.zfs.metaslab.bias_enabled           1
>	vfs.zfs.metaslab.lba_weighting_enabled  1
>	vfs.zfs.metaslab.fragmentation_factor_enabled1
>	vfs.zfs.metaslab.preload_enabled        1
>	vfs.zfs.metaslab.preload_limit          3
>	vfs.zfs.metaslab.unload_delay           8
>	vfs.zfs.metaslab.load_pct               50
>	vfs.zfs.metaslab.min_alloc_size         33554432
>	vfs.zfs.metaslab.df_free_pct            4
>	vfs.zfs.metaslab.df_alloc_threshold     131072
>	vfs.zfs.metaslab.debug_unload           0
>	vfs.zfs.metaslab.debug_load             0
>	vfs.zfs.metaslab.fragmentation_threshold70
>	vfs.zfs.metaslab.gang_bang              16777217
>	vfs.zfs.free_bpobj_enabled              1
>	vfs.zfs.free_max_blocks                 -1
>	vfs.zfs.no_scrub_prefetch               0
>	vfs.zfs.no_scrub_io                     0
>	vfs.zfs.resilver_min_time_ms            3000
>	vfs.zfs.free_min_time_ms                1000
>	vfs.zfs.scan_min_time_ms                1000
>	vfs.zfs.scan_idle                       50
>	vfs.zfs.scrub_delay                     4
>	vfs.zfs.resilver_delay                  2
>	vfs.zfs.top_maxinflight                 288
>	vfs.zfs.zfetch.array_rd_sz              1048576
>	vfs.zfs.zfetch.max_distance             8388608
>	vfs.zfs.zfetch.min_sec_reap             2
>	vfs.zfs.zfetch.max_streams              24
>	vfs.zfs.prefetch_disable                1
>	vfs.zfs.delay_scale                     500000
>	vfs.zfs.delay_min_dirty_percent         60
>	vfs.zfs.dirty_data_sync                 67108864
>	vfs.zfs.dirty_data_max_percent          10
>	vfs.zfs.dirty_data_max_max              4294967296
>	vfs.zfs.dirty_data_max                  4294967296
>	vfs.zfs.max_recordsize                  1048576
>	vfs.zfs.send_holes_without_birth_time   1
>	vfs.zfs.mdcomp_disable                  0
>	vfs.zfs.nopwrite_enabled                1
>	vfs.zfs.dedup.prefetch                  1
>	vfs.zfs.l2c_only_size                   0
>	vfs.zfs.mfu_ghost_data_lsize            77190533120
>	vfs.zfs.mfu_ghost_metadata_lsize        0
>	vfs.zfs.mfu_ghost_size                  77190533120
>	vfs.zfs.mfu_data_lsize                  127972583424
>	vfs.zfs.mfu_metadata_lsize              86469632
>	vfs.zfs.mfu_size                        128122844160
>	vfs.zfs.mru_ghost_data_lsize            128965865984
>	vfs.zfs.mru_ghost_metadata_lsize        0
>	vfs.zfs.mru_ghost_size                  128965865984
>	vfs.zfs.mru_data_lsize                  76364182016
>	vfs.zfs.mru_metadata_lsize              368644608
>	vfs.zfs.mru_size                        77192510464
>	vfs.zfs.anon_data_lsize                 0
>	vfs.zfs.anon_metadata_lsize             0
>	vfs.zfs.anon_size                       3833856
>	vfs.zfs.l2arc_norw                      1
>	vfs.zfs.l2arc_feed_again                1
>	vfs.zfs.l2arc_noprefetch                0
>	vfs.zfs.l2arc_feed_min_ms               200
>	vfs.zfs.l2arc_feed_secs                 1
>	vfs.zfs.l2arc_headroom                  4
>	vfs.zfs.l2arc_write_boost               174063616
>	vfs.zfs.l2arc_write_max                 87031808
>	vfs.zfs.arc_meta_limit                  66676244480
>	vfs.zfs.arc_free_target                 453255
>	vfs.zfs.arc_shrink_shift                7
>	vfs.zfs.arc_average_blocksize           8192
>	vfs.zfs.arc_min                         206158430208
>	vfs.zfs.arc_max                         266704977920
>
>------------------------------------------------------------------------
>

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Attachments on bug 219457: 182804 | 182805 | 182806 | 182807 | 182943 | 182944 | 182945 | 182946