intermittent lockups readynas pro 4 on firmware 6.7.5

here are those two files, i see where there are "out of memory" notices, but it seems to kill the process and continues to run. where as when it hangs, nothing works except a hard power reset. well looks like i cant attach the files, so here is a part of the logs:

dmesg.log

[Thu Jul 6 04:10:40 2017] Mem-Info:
[Thu Jul 6 04:10:40 2017] active_anon:80 inactive_anon:138 isolated_anon:0
active_file:59749 inactive_file:106860 isolated_file:276
unevictable:0 dirty:110409 writeback:3918 unstable:0
slab_reclaimable:22507 slab_unreclaimable:15787
mapped:5254 shmem:4 pagetables:2075 bounce:0
free:6320 free_pcp:186 free_cma:0
[Thu Jul 6 04:10:40 2017] DMA free:4012kB min:316kB low:392kB high:472kB active_anon:0kB inactive_anon:0kB active_file:68kB inactive_file:412kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15972kB managed:15888kB mlocked:0kB dirty:412kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:6380kB slab_unreclaimable:1632kB kernel_stack:16kB pagetables:132kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:2920 all_unreclaimable? yes
[Thu Jul 6 04:10:40 2017] lowmem_reserve[]: 0 959 959 959
[Thu Jul 6 04:10:40 2017] DMA32 free:21268kB min:19748kB low:24684kB high:29620kB active_anon:320kB inactive_anon:552kB active_file:238928kB inactive_file:426836kB unevictable:0kB isolated(anon):0kB isolated(file):1232kB present:1022656kB managed:987772kB mlocked:0kB dirty:441224kB writeback:15672kB mapped:21016kB shmem:16kB slab_reclaimable:83648kB slab_unreclaimable:61516kB kernel_stack:4208kB pagetables:8168kB unstable:0kB bounce:0kB free_pcp:744kB local_pcp:20kB free_cma:0kB writeback_tmp:0kB pages_scanned:4465512 all_unreclaimable? yes
[Thu Jul 6 04:10:40 2017] lowmem_reserve[]: 0 0 0 0
[Thu Jul 6 04:10:40 2017] DMA: 33*4kB (UE) 29*8kB (UE) 26*16kB (UME) 43*32kB (UME) 21*64kB (UME) 4*128kB (UE) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 4012kB
[Thu Jul 6 04:10:40 2017] DMA32: 3009*4kB (UME) 600*8kB (UMEH) 25*16kB (UMEH) 0*32kB 1*64kB (H) 1*128kB (H) 1*256kB (H) 1*512kB (H) 1*1024kB (H) 1*2048kB (H) 0*4096kB = 21268kB
[Thu Jul 6 04:10:40 2017] 167062 total pagecache pages
[Thu Jul 6 04:10:40 2017] 166 pages in swap cache
[Thu Jul 6 04:10:40 2017] Swap cache stats: add 96986, delete 96820, find 127116/143802
[Thu Jul 6 04:10:40 2017] Free swap = 953448kB
[Thu Jul 6 04:10:40 2017] Total swap = 1046524kB
[Thu Jul 6 04:10:40 2017] 259657 pages RAM
[Thu Jul 6 04:10:40 2017] 0 pages HighMem/MovableOnly
[Thu Jul 6 04:10:40 2017] 8742 pages reserved
[Thu Jul 6 04:10:40 2017] [ pid ] uid tgid total_vm rss nr_ptes nr_pmds swapents oom_score_adj name
[Thu Jul 6 04:10:40 2017] [ 1453] 0 1453 29860 1517 28 3 132 0 systemd-journal
[Thu Jul 6 04:10:40 2017] [ 1471] 0 1471 10013 458 23 3 211 -1000 systemd-udevd
[Thu Jul 6 04:10:40 2017] [ 3026] 0 3026 8153 508 19 3 72 0 cron
[Thu Jul 6 04:10:40 2017] [ 3027] 84 3027 8056 324 22 3 85 0 avahi-daemon
[Thu Jul 6 04:10:40 2017] [ 3028] 83 3028 10173 593 24 3 150 -900 dbus-daemon
[Thu Jul 6 04:10:40 2017] [ 3029] 84 3029 8027 0 21 3 63 0 avahi-daemon
[Thu Jul 6 04:10:40 2017] [ 3031] 0 3031 5899 652 17 3 73 0 connmand
[Thu Jul 6 04:10:40 2017] [ 3032] 0 3032 1602 362 9 3 62 0 raidard
[Thu Jul 6 04:10:40 2017] [ 3033] 0 3033 3893 399 14 3 93 0 mdadm
[Thu Jul 6 04:10:40 2017] [ 3035] 0 3035 1068 362 8 3 33 0 noflushd
[Thu Jul 6 04:10:40 2017] [ 3036] 0 3036 6916 77 15 3 80 0 mdcsrepaird
[Thu Jul 6 04:10:40 2017] [ 3038] 0 3038 1586 347 8 3 57 0 wsdd2
[Thu Jul 6 04:10:40 2017] [ 3040] 0 3040 9399 364 22 3 148 0 systemd-logind
[Thu Jul 6 04:10:40 2017] [ 3050] 0 3050 13798 451 30 3 169 -1000 sshd
[Thu Jul 6 04:10:40 2017] [ 3089] 0 3089 9297 395 23 4 118 0 rpcbind
[Thu Jul 6 04:10:40 2017] [ 3099] 0 3099 31962 362 33 3 170 0 netatalk
[Thu Jul 6 04:10:40 2017] [ 3105] 0 3105 30578 744 62 3 353 0 afpd
[Thu Jul 6 04:10:40 2017] [ 3106] 0 3106 11859 708 27 3 132 0 cnid_metad
[Thu Jul 6 04:10:40 2017] [ 3128] 79 3128 9320 407 23 3 146 0 rpc.statd
[Thu Jul 6 04:10:40 2017] [ 3143] 0 3143 4881 405 12 3 39 0 agetty
[Thu Jul 6 04:10:40 2017] [ 3147] 0 3147 4836 463 14 3 38 0 agetty
[Thu Jul 6 04:10:40 2017] [ 3223] 0 3223 56891 638 107 4 457 0 nmbd
[Thu Jul 6 04:10:40 2017] [ 3229] 0 3229 34593 596 72 3 974 0 apache2
[Thu Jul 6 04:10:40 2017] [ 3238] 0 3238 82363 1010 154 3 684 0 smbd
[Thu Jul 6 04:10:40 2017] [ 3240] 0 3240 80216 532 144 3 686 0 smbd-notifyd
[Thu Jul 6 04:10:40 2017] [ 3241] 0 3241 80221 467 142 3 673 0 cleanupd
[Thu Jul 6 04:10:40 2017] [ 3242] 0 3242 385265 2273 165 5 12363 -1000 readynasd
[Thu Jul 6 04:10:40 2017] [ 3594] 0 3594 32478 433 28 3 129 0 fvbackup-q
[Thu Jul 6 04:10:40 2017] [ 3628] 0 3628 1589 270 8 3 31 0 minissdpd
[Thu Jul 6 04:10:40 2017] [ 3629] 1 3629 8374 462 19 3 72 0 upnphttpd
[Thu Jul 6 04:10:40 2017] [ 5746] 0 5746 12443 439 26 3 423 0 proftpd
[Thu Jul 6 04:10:40 2017] [ 5755] 0 5755 4423 476 13 3 48 0 rsync
[Thu Jul 6 04:10:40 2017] [ 5773] 0 5773 6379 0 16 3 59 0 rpc.idmapd
[Thu Jul 6 04:10:40 2017] [ 5775] 0 5775 9454 269 22 3 193 0 rpc.mountd
[Thu Jul 6 04:10:40 2017] [ 5776] 0 5776 33564 612 32 3 303 0 minidlnad
[Thu Jul 6 04:10:40 2017] [ 5786] 0 5786 1021 135 7 3 20 0 apache_log
[Thu Jul 6 04:10:40 2017] [ 5787] 0 5787 1021 133 7 3 20 0 apache_log
[Thu Jul 6 04:10:40 2017] [ 5788] 0 5788 34593 0 66 3 945 0 apache2
[Thu Jul 6 04:10:40 2017] [ 5789] 98 5789 34601 231 69 3 950 0 apache2
[Thu Jul 6 04:10:40 2017] [ 5790] 98 5790 34601 231 69 3 950 0 apache2
[Thu Jul 6 04:10:40 2017] [ 5791] 98 5791 34601 231 69 3 950 0 apache2
[Thu Jul 6 04:10:40 2017] [ 5792] 98 5792 34645 367 69 3 992 0 apache2
[Thu Jul 6 04:10:40 2017] [ 5793] 98 5793 34601 231 69 3 950 0 apache2
[Thu Jul 6 04:10:40 2017] [ 6013] 99 6013 88777 1230 167 3 890 0 smbd
[Thu Jul 6 04:10:40 2017] [18601] 0 18601 6768 806 18 3 130 -1000 bash
[Thu Jul 6 04:10:40 2017] [18784] 0 18784 10213 847 24 3 113 -1000 msmtp
[Thu Jul 6 04:10:40 2017] Out of memory: Kill process 6013 (smbd) score 4 or sacrifice child
[Thu Jul 6 04:10:40 2017] Killed process 6013 (smbd) total-vm:355108kB, anon-rss:84kB, file-rss:4836kB
[Thu Jul 6 06:15:08 2017] usb 2-2: reset high-speed USB device number 3 using ehci-pci
[Thu Jul 6 06:15:08 2017] sd 7:0:0:0: [sdf] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
[Thu Jul 6 06:15:08 2017] sd 7:0:0:0: [sdf] tag#0 CDB: Read(10) 28 00 00 00 00 3f 00 00 01 00
[Thu Jul 6 06:15:08 2017] blk_update_request: I/O error, dev sdf, sector 504
[Thu Jul 6 06:15:08 2017] usb 2-2: reset high-speed USB device number 3 using ehci-pci
[Thu Jul 6 06:15:20 2017] nr_pdflush_threads exported in /proc is scheduled for removal

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------

btrfs.log

Label: '5e26ecb8:root'  uuid: 6a44d55d-1d4f-4ed6-98c8-4dc10fcb90e2
    Total devices 1 FS bytes used 536.44MiB
    devid    1 size 4.00GiB used 1.24GiB path /dev/md0

Label: '5e26ecb8:DATA'  uuid: f52711ff-56a4-422e-829b-3ba0f774dd83
    Total devices 1 FS bytes used 3.11TiB
    devid    1 size 8.17TiB used 3.12TiB path /dev/mapper/DATA-0

=== filesystem /DATA ===
Data, single: total=3.11TiB, used=3.10TiB
System, DUP: total=32.00MiB, used=384.00KiB
Metadata, DUP: total=6.50GiB, used=4.85GiB
GlobalReserve, single: total=512.00MiB, used=0.00B
=== subvolume /DATA ===
ID 257 gen 30 top level 5 path .purge
ID 258 gen 7103 top level 5 path ._share
ID 259 gen 7847 top level 5 path .apps
ID 260 gen 13 top level 5 path home
ID 261 gen 13 top level 5 path .vault
ID 264 gen 5664 top level 5 path .timemachine
ID 265 gen 7102 top level 5 path Videos
ID 266 gen 7103 top level 265 path Videos/.snapshots
ID 970 gen 809 top level 266 path Videos/.snapshots/1/snapshot
ID 2236 gen 7096 top level 5 path Software
ID 2237 gen 7097 top level 2236 path Software/.snapshots
ID 2356 gen 7093 top level 5 path prepping
ID 2357 gen 7094 top level 2356 path prepping/.snapshots
ID 2358 gen 7087 top level 5 path Backup
ID 2359 gen 7088 top level 2358 path Backup/.snapshots
ID 2466 gen 2485 top level 2359 path Backup/.snapshots/1/snapshot
ID 2467 gen 2487 top level 2357 path prepping/.snapshots/1/snapshot
ID 2468 gen 2489 top level 2237 path Software/.snapshots/1/snapshot
ID 2469 gen 2491 top level 266 path Videos/.snapshots/2/snapshot
ID 2470 gen 7090 top level 5 path Music
ID 2471 gen 7091 top level 2470 path Music/.snapshots
ID 2817 gen 2992 top level 2359 path Backup/.snapshots/2/snapshot
ID 2818 gen 2995 top level 2471 path Music/.snapshots/1/snapshot
ID 2819 gen 2998 top level 2357 path prepping/.snapshots/2/snapshot
ID 2820 gen 3001 top level 2237 path Software/.snapshots/2/snapshot
ID 2821 gen 3004 top level 266 path Videos/.snapshots/3/snapshot
ID 3368 gen 5247 top level 2359 path Backup/.snapshots/3/snapshot
ID 3369 gen 5250 top level 2471 path Music/.snapshots/2/snapshot
ID 3370 gen 5253 top level 2357 path prepping/.snapshots/3/snapshot
ID 3371 gen 5256 top level 2237 path Software/.snapshots/3/snapshot
ID 3372 gen 5259 top level 266 path Videos/.snapshots/4/snapshot
ID 3373 gen 7848 top level 5 path Triimaging
ID 3374 gen 7100 top level 3373 path Triimaging/.snapshots
ID 3472 gen 7087 top level 2359 path Backup/.snapshots/4/snapshot
ID 3473 gen 7090 top level 2471 path Music/.snapshots/3/snapshot
ID 3474 gen 7093 top level 2357 path prepping/.snapshots/4/snapshot
ID 3475 gen 7096 top level 2237 path Software/.snapshots/4/snapshot
ID 3476 gen 7099 top level 3374 path Triimaging/.snapshots/1/snapshot
ID 3477 gen 7102 top level 266 path Videos/.snapshots/5/snapshot
=== btrfs dump-super /dev/md0
superblock: bytenr=65536, device=/dev/md0
---------------------------------------------------------
csum_type        0 (crc32c)
csum_size        4
csum            0x504bfd7c [match]
bytenr            65536
flags            0x1
            ( WRITTEN )
magic            _BHRfS_M [match]
fsid            6a44d55d-1d4f-4ed6-98c8-4dc10fcb90e2
label            5e26ecb8:root
generation        5732
root            175390720
sys_array_size        129
chunk_root_generation    77
root_level        0
chunk_root        20987904
chunk_root_level    0
log_root        0
log_root_transid    0
log_root_level        0
total_bytes        4290772992
bytes_used        562499584
sectorsize        4096
nodesize        16384
leafsize        16384
stripesize        4096
root_dir        6
num_devices        1
compat_flags        0x0
compat_ro_flags        0x0
incompat_flags        0x161
            ( MIXED_BACKREF |
              BIG_METADATA |
              EXTENDED_IREF |
              SKINNY_METADATA )
cache_generation    18446744073709551615
uuid_tree_generation    5732
dev_item.uuid        496486b4-fef3-40ab-bf7b-25ca3e7a449b
dev_item.fsid        6a44d55d-1d4f-4ed6-98c8-4dc10fcb90e2 [match]
dev_item.type        0
dev_item.total_bytes    4290772992
dev_item.bytes_used    1326579712
dev_item.io_align    4096
dev_item.io_width    4096
dev_item.sector_size    4096
dev_item.devid        1
dev_item.dev_group    0
dev_item.seek_speed    0
dev_item.bandwidth    0
dev_item.generation    0
sys_chunk_array[2048]:
    item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 20971520)
        length 8388608 owner 2 stripe_len 65536 type SYSTEM|DUP
        io_align 65536 io_width 65536 sector_size 4096
        num_stripes 2 sub_stripes 0
            stripe 0 devid 1 offset 20971520
            dev_uuid 496486b4-fef3-40ab-bf7b-25ca3e7a449b
            stripe 1 devid 1 offset 29360128
            dev_uuid 496486b4-fef3-40ab-bf7b-25ca3e7a449b
backup_roots[4]:
    backup 0:
        backup_tree_root:    174800896    gen: 5730    level: 0
        backup_chunk_root:    20987904    gen: 77    level: 0
        backup_extent_root:    174768128    gen: 5730    level: 1
        backup_fs_root:        174702592    gen: 5730    level: 2
        backup_dev_root:    31178752    gen: 4980    level: 0
        backup_csum_root:    168624128    gen: 5693    level: 1
        backup_total_bytes:    4290772992
        backup_bytes_used:    562483200
        backup_num_devices:    1

    backup 1:
        backup_tree_root:    175226880    gen: 5731    level: 0
        backup_chunk_root:    20987904    gen: 77    level: 0
        backup_extent_root:    175063040    gen: 5731    level: 1
        backup_fs_root:        174833664    gen: 5731    level: 2
        backup_dev_root:    31178752    gen: 4980    level: 0
        backup_csum_root:    174948352    gen: 5731    level: 1
        backup_total_bytes:    4290772992
        backup_bytes_used:    562499584
        backup_num_devices:    1

    backup 2:
        backup_tree_root:    175390720    gen: 5732    level: 0
        backup_chunk_root:    20987904    gen: 77    level: 0
        backup_extent_root:    175357952    gen: 5732    level: 1
        backup_fs_root:        175243264    gen: 5732    level: 2
        backup_dev_root:    31178752    gen: 4980    level: 0
        backup_csum_root:    174948352    gen: 5731    level: 1
        backup_total_bytes:    4290772992
        backup_bytes_used:    562499584
        backup_num_devices:    1

    backup 3:
        backup_tree_root:    174669824    gen: 5729    level: 0
        backup_chunk_root:    20987904    gen: 77    level: 0
        backup_extent_root:    174637056    gen: 5729    level: 1
        backup_fs_root:        174538752    gen: 5729    level: 2
        backup_dev_root:    31178752    gen: 4980    level: 0
        backup_csum_root:    168624128    gen: 5693    level: 1
        backup_total_bytes:    4290772992
        backup_bytes_used:    562483200
        backup_num_devices:    1