Hi!
I=92m seeing the same thing since upgrading to 10/stable. Things seems to n=
eed swap although there is still available memory. I tend not to use swap o=
n my virtual instances but I=92ve seen error messages like this since upgra=
ding to 10/stable:
pid 3028 (mysqld), uid 88, was killed: out of swap space
Mem: 24M Active, 8012K Inact, 109M Wired, 2176K Cache, 69M Buf, 433M Free
Looks like there should be enough memory to start mysql=85 (the above insta=
nce is a t1.micro FreeBSD AMI running on AWS EC2, created by Colin Percival=
) =
Something seems to have changed since FreeBSD 9 in terms of memory manager =
/ page eviction.
Anyone else seeing this? Is it now impossible to run FreeBSD without a swap=
partition (and or file)? This happens on my server as well which has 8GB R=
AM and plenty of free RAM=85
I don=92t want to start guessing, but perhaps this happens when there is so=
me memory fragmentation=85? I need to verify if this is the case though. =
Thanks
Johan
On 02 Feb 2014, at 18:00, Matthias Gamsjager <mgamsjager@gmail.com> wrote:
> Hi,
> =
> My ZFS Nas box seems to use some swap since the upgrade to 10/stable. This
> machine just runs couple of hours per week and with 9/stable I never
> witnessed any swapping when serving media files.
> =
> First thinks that caught my eye was the difference between ARC and Wired.
> At some point there is a 1+ GB difference while all this machine does is
> serving single 10GB mkv via AFP.
> =
> Problem is that at some point the performance get's to a point that
> streaming isn't possible.
> =
> This is after couple of video's watched and scrub 99% done.
> =
> No ZFS tuning in /boot/loader.conf
> =
> last pid: 2571; load averages: 0.19, 0.20, 0.19 up
> 0+04:06:20 17:55:43
> =
> 42 processes: 1 running, 41 sleeping
> =
> CPU: 0.0% user, 0.0% nice, 2.3% system, 0.0% interrupt, 97.7% idle
> =
> Mem: 32M Active, 14M Inact, 7563M Wired, 16M Cache, 273M Buf, 303M Free
> =
> ARC: 6065M Total, 2142M MFU, 3309M MRU, 50K Anon, 136M Header, 478M Other
> =
> Swap: 4096M Total, 66M Used, 4030M Free, 1% Inuse
> =
> =
> System Information:
> =
> =
> Kernel Version: 1000702 (osreldate)
> =
> Hardware Platform: amd64
> =
> Processor Architecture: amd64
> =
> =
> ZFS Storage pool Version: 5000
> =
> ZFS Filesystem Version: 5
> =
> =
> FreeBSD 10.0-STABLE #0 r261210: Mon Jan 27 15:19:13 CET 2014 matty
> =
> 5:57PM up 4:08, 2 users, load averages: 0.31, 0.23, 0.21
> =
> =
> ------------------------------------------------------------------------
> =
> =
> System Memory:
> =
> =
> 0.41% 32.43 MiB Active, 0.18% 14.11 MiB Inact
> =
> 95.39% 7.39 GiB Wired, 0.21% 16.37 MiB Cache
> =
> 3.81% 301.97 MiB Free, 0.01% 784.00 KiB Gap
> =
> =
> Real Installed: 8.00 GiB
> =
> Real Available: 99.50% 7.96 GiB
> =
> Real Managed: 97.28% 7.74 GiB
> =
> =
> Logical Total: 8.00 GiB
> =
> Logical Used: 95.94% 7.68 GiB
> =
> Logical Free: 4.06% 332.45 MiB
> =
> =
> Kernel Memory: 196.21 MiB
> =
> Data: 79.49% 155.96 MiB
> =
> Text: 20.51% 40.25 MiB
> =
> =
> Kernel Memory Map: 7.74 GiB
> =
> Size: 71.72% 5.55 GiB
> =
> Free: 28.28% 2.19 GiB
> =
> =
> ------------------------------------------------------------------------
> =
> =
> ARC Summary: (HEALTHY)
> =
> Memory Throttle Count: 0
> =
> =
> ARC Misc:
> =
> Deleted: 34.10k
> =
> Recycle Misses: 102.86k
> =
> Mutex Misses: 10
> =
> Evict Skips: 989.63k
> =
> =
> ARC Size: 87.94% 5.93 GiB
> =
> Target Size: (Adaptive) 90.63% 6.11 GiB
> =
> Min Size (Hard Limit): 12.50% 863.10 MiB
> =
> Max Size (High Water): 8:1 6.74 GiB
> =
> =
> ARC Size Breakdown:
> =
> Recently Used Cache Size: 65.86% 4.02 GiB
> =
> Frequently Used Cache Size: 34.14% 2.09 GiB
> =
> =
> ARC Hash Breakdown:
> =
> Elements Max: 594.22k
> =
> Elements Current: 100.00% 594.21k
> =
> Collisions: 609.54k
> =
> Chain Max: 15
> =
> Chains: 122.92k
> =
> =
> ------------------------------------------------------------------------
> =
> =
> ARC Efficiency: 4.19m
> =
> Cache Hit Ratio: 83.08% 3.48m
> =
> Cache Miss Ratio: 16.92% 708.94k
> =
> Actual Hit Ratio: 73.81% 3.09m
> =
> =
> Data Demand Efficiency: 79.24% 456.96k
> =
> Data Prefetch Efficiency: 2.94% 90.16k
> =
> =
> CACHE HITS BY CACHE LIST:
> =
> Anonymously Used: 8.80% 306.18k
> =
> Most Recently Used: 23.42% 815.06k
> =
> Most Frequently Used: 65.43% 2.28m
> =
> Most Recently Used Ghost: 0.41% 14.36k
> =
> Most Frequently Used Ghost: 1.94% 67.65k
> =
> =
> CACHE HITS BY DATA TYPE:
> =
> Demand Data: 10.40% 362.08k
> =
> Prefetch Data: 0.08% 2.65k
> =
> Demand Metadata: 76.84% 2.67m
> =
> Prefetch Metadata: 12.68% 441.47k
> =
> =
> CACHE MISSES BY DATA TYPE:
> =
> Demand Data: 13.38% 94.88k
> =
> Prefetch Data: 12.34% 87.51k
> =
> Demand Metadata: 34.54% 244.88k
> =
> Prefetch Metadata: 39.73% 281.67k
> =
> =
> ------------------------------------------------------------------------
> =
> =
> L2ARC is disabled
> =
> =
> ------------------------------------------------------------------------
> =
> =
> File-Level Prefetch: (HEALTHY)
> =
> =
> DMU Efficiency: 9.57m
> =
> Hit Ratio: 73.77% 7.06m
> =
> Miss Ratio: 26.23% 2.51m
> =
> =
> Colinear: 2.51m
> =
> Hit Ratio: 0.06% 1.54k
> =
> Miss Ratio: 99.94% 2.51m
> =
> =
> Stride: 6.92m
> =
> Hit Ratio: 99.99% 6.92m
> =
> Miss Ratio: 0.01% 594
> =
> =
> DMU Misc:
> =
> Reclaim: 2.51m
> =
> Successes: 0.85% 21.28k
> =
> Failures: 99.15% 2.49m
> =
> =
> Streams: 137.84k
> =
> +Resets: 0.06% 79
> =
> -Resets: 99.94% 137.76k
> =
> Bogus: 0
> =
> =
> ------------------------------------------------------------------------
> =
> =
> VDEV cache is disabled
> =
> =
> ------------------------------------------------------------------------
> =
> =
> ZFS Tunables (sysctl):
> =
> kern.maxusers 845
> =
> vm.kmem_size 8313913344
> =
> vm.kmem_size_scale 1
> =
> vm.kmem_size_min 0
> =
> vm.kmem_size_max 1319413950874
> =
> vfs.zfs.arc_max 7240171520
> =
> vfs.zfs.arc_min 905021440
> =
> vfs.zfs.arc_meta_used 2166001368
> =
> vfs.zfs.arc_meta_limit 1810042880
> =
> vfs.zfs.l2arc_write_max 8388608
> =
> vfs.zfs.l2arc_write_boost 8388608
> =
> vfs.zfs.l2arc_headroom 2
> =
> vfs.zfs.l2arc_feed_secs 1
> =
> vfs.zfs.l2arc_feed_min_ms 200
> =
> vfs.zfs.l2arc_noprefetch 1
> =
> vfs.zfs.l2arc_feed_again 1
> =
> vfs.zfs.l2arc_norw 1
> =
> vfs.zfs.anon_size 51200
> =
> vfs.zfs.anon_metadata_lsize 0
> =
> vfs.zfs.anon_data_lsize 0
> =
> vfs.zfs.mru_size 3476498432
> =
> vfs.zfs.mru_metadata_lsize 1319031808
> =
> vfs.zfs.mru_data_lsize 2150589440
> =
> vfs.zfs.mru_ghost_size 361860096
> =
> vfs.zfs.mru_ghost_metadata_lsize 210866688
> =
> vfs.zfs.mru_ghost_data_lsize 150993408
> =
> vfs.zfs.mfu_size 2246172672
> =
> vfs.zfs.mfu_metadata_lsize 32768
> =
> vfs.zfs.mfu_data_lsize 2050486272
> =
> vfs.zfs.mfu_ghost_size 6198800896
> =
> vfs.zfs.mfu_ghost_metadata_lsize 2818404864
> =
> vfs.zfs.mfu_ghost_data_lsize 3380396032
> =
> vfs.zfs.l2c_only_size 0
> =
> vfs.zfs.dedup.prefetch 1
> =
> vfs.zfs.nopwrite_enabled 1
> =
> vfs.zfs.mdcomp_disable 0
> =
> vfs.zfs.prefetch_disable 0
> =
> vfs.zfs.zfetch.max_streams 8
> =
> vfs.zfs.zfetch.min_sec_reap 2
> =
> vfs.zfs.zfetch.block_cap 256
> =
> vfs.zfs.zfetch.array_rd_sz 1048576
> =
> vfs.zfs.top_maxinflight 32
> =
> vfs.zfs.resilver_delay 2
> =
> vfs.zfs.scrub_delay 4
> =
> vfs.zfs.scan_idle 50
> =
> vfs.zfs.scan_min_time_ms 1000
> =
> vfs.zfs.free_min_time_ms 1000
> =
> vfs.zfs.resilver_min_time_ms 3000
> =
> vfs.zfs.no_scrub_io 0
> =
> vfs.zfs.no_scrub_prefetch 0
> =
> vfs.zfs.metaslab.gang_bang 131073
> =
> vfs.zfs.metaslab.debug 0
> =
> vfs.zfs.metaslab.df_alloc_threshold 131072
> =
> vfs.zfs.metaslab.df_free_pct 4
> =
> vfs.zfs.metaslab.min_alloc_size 10485760
> =
> vfs.zfs.metaslab.prefetch_limit 3
> =
> vfs.zfs.metaslab.smo_bonus_pct 150
> =
> vfs.zfs.mg_alloc_failures 8
> =
> vfs.zfs.write_to_degraded 0
> =
> vfs.zfs.check_hostid 1
> =
> vfs.zfs.recover 0
> =
> vfs.zfs.deadman_synctime_ms 1000000
> =
> vfs.zfs.deadman_checktime_ms 5000
> =
> vfs.zfs.deadman_enabled 1
> =
> vfs.zfs.space_map_last_hope 0
> =
> vfs.zfs.txg.timeout 5
> =
> vfs.zfs.vdev.cache.max 16384
> =
> vfs.zfs.vdev.cache.size 0
> =
> vfs.zfs.vdev.cache.bshift 16
> =
> vfs.zfs.vdev.trim_on_init 1
> =
> vfs.zfs.vdev.max_active 1000
> =
> vfs.zfs.vdev.sync_read_min_active 10
> =
> vfs.zfs.vdev.sync_read_max_active 10
> =
> vfs.zfs.vdev.sync_write_min_active 10
> =
> vfs.zfs.vdev.sync_write_max_active 10
> =
> vfs.zfs.vdev.async_read_min_active 1
> =
> vfs.zfs.vdev.async_read_max_active 3
> =
> vfs.zfs.vdev.async_write_min_active 1
> =
> vfs.zfs.vdev.async_write_max_active 10
> =
> vfs.zfs.vdev.scrub_min_active 1
> =
> vfs.zfs.vdev.scrub_max_active 2
> =
> vfs.zfs.vdev.aggregation_limit 131072
> =
> vfs.zfs.vdev.read_gap_limit 32768
> =
> vfs.zfs.vdev.write_gap_limit 4096
> =
> vfs.zfs.vdev.bio_flush_disable 0
> =
> vfs.zfs.vdev.bio_delete_disable 0
> =
> vfs.zfs.vdev.trim_max_bytes 2147483648
> =
> vfs.zfs.vdev.trim_max_pending 64
> =
> vfs.zfs.max_auto_ashift 13
> =
> vfs.zfs.zil_replay_disable 0
> =
> vfs.zfs.cache_flush_disable 0
> =
> vfs.zfs.zio.use_uma 1
> =
> vfs.zfs.zio.exclude_metadata 0
> =
> vfs.zfs.sync_pass_deferred_free 2
> =
> vfs.zfs.sync_pass_dont_compress 5
> =
> vfs.zfs.sync_pass_rewrite 2
> =
> vfs.zfs.snapshot_list_prefetch 0
> =
> vfs.zfs.super_owner 0
> =
> vfs.zfs.debug 0
> =
> vfs.zfs.version.ioctl 3
> =
> vfs.zfs.version.acl 1
> =
> vfs.zfs.version.spa 5000
> =
> vfs.zfs.version.zpl 5
> =
> vfs.zfs.trim.enabled 1
> =
> vfs.zfs.trim.txg_delay 32
> =
> vfs.zfs.trim.timeout 30
> =
> vfs.zfs.trim.max_interval 1
> =
> =
> ------------------------------------------------------------------------
> _______________________________________________
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