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I observe some short-lived txgs with 0 write on my desktop. The system is mostly idle. I could not figure out what is happening. Environment: root@svr:~# uname -a
Linux svr 5.11.0-17-generic #18-Ubuntu SMP Thu May 6 20:10:11 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
root@svr:~# zfs --version
zfs-2.0.2-1ubuntu5
zfs-kmod-2.0.2-1ubuntu5root@svr:~# zpool status tank
pool: tank
state: ONLINE
scan: scrub repaired 0B in 03:52:44 with 0 errors on Sun Apr 11 04:16:59 2021
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
wwn-0x50014ee2678f201f ONLINE 0 0 0
special
ata-Crucial_CT275MX300SSD1_16291347CFBB-part1 ONLINE 0 0 0
logs
ata-Samsung_SSD_840_PRO_Series_S1ANNSADC24321M-part5 ONLINE 0 0 0
errors: No known data errors
root@svr:~# cat /proc/spl/kstat/zfs/dmu_tx
12 1 0x01 12 3264 3434216544 70643407317271
name type data
dmu_tx_assigned 4 3809725
dmu_tx_delay 4 0
dmu_tx_error 4 0
dmu_tx_suspended 4 0
dmu_tx_group 4 24
dmu_tx_memory_reserve 4 0
dmu_tx_memory_reclaim 4 2
dmu_tx_dirty_throttle 4 0
dmu_tx_dirty_delay 4 248384
dmu_tx_dirty_over_max 4 0
dmu_tx_dirty_frees_delay 4 392
dmu_tx_quota 4 0
root@svr:~# arcstat
time read miss miss% dmis dm% pmis pm% mmis mm% size c avail
13:22:56 0 0 0 0 0 0 0 0 0 11G 11G 400Mroot@svr:~# cat /proc/spl/kstat/zfs/tank/txgs
txg birth state ndirty nread nwritten reads writes otime qtime wtime stime
10990882 70580715490152 C 0 0 0 0 0 99323 1307 5100 18556
10990883 70580715589475 C 0 0 0 0 0 7269 899 20010 12188
10990884 70580715596744 C 0 0 0 0 0 38695 830 6400 15608
10990885 70580715635439 C 19067392 0 18137088 0 159 5179379380 2422 41771 231786899
10990886 70585895014819 C 6881280 393216 6852608 3 104 5120004219 4349 40644 111675785
10990887 70591015019038 C 9261568 131072 8560640 1 146 5120073205 3800 51448 136375964
10990888 70596135092243 C 18320384 0 13336576 0 165 5120074678 8525 90105 172042805
10990889 70601255166921 C 35808256 1531904 35000320 12 171 5119898720 3038 20844 385155934
10990890 70606375065641 C 9706496 0 9379840 0 150 5120096612 8385 86580 143184596
10990891 70611495162253 C 23356928 0 22704128 0 163 5120019035 5331 49317 267552210
10990892 70616615181288 C 933888 131072 1359872 1 105 267635444 17260 15505 77436678
10990893 70616882816732 C 0 0 0 0 0 77489005 2861 35985 164641
10990894 70616960305737 C 0 0 0 0 0 212603 1947 12502 144278
10990895 70616960518340 C 0 0 0 0 0 213399 2206 9344 26797
10990896 70616960731739 C 3815424 0 3448832 0 146 5030418913 3932 36336 102442241
10990897 70621991150652 C 8167424 786432 6705152 5 122 5119985383 5273 66254 126856517
10990898 70627111136035 C 1720320 786432 2142208 6 110 126947276 2748 12225 89068133
10990899 70627238083311 C 2307584 655360 2342912 5 126 89095221 2347 9927 77935280
10990900 70627327178532 C 1851392 393216 2162688 3 105 77966404 2491 15729 88709360
10990901 70627405144936 C 1720320 393216 2084864 3 104 88749080 3358 43341 88788879
10990902 70627493894016 C 5662720 0 5271552 0 135 5249307036 8000 90485 139412215
10990903 70632743201052 C 0 0 0 0 0 139527936 2481 25862 178190
10990904 70632882728988 C 0 0 0 0 0 211836 1093 12764 162977
10990905 70632882940824 C 0 0 0 0 0 182258 985 8818 16896
10990906 70632883123082 C 0 0 0 0 0 81118 2340 10899 9304112
10990907 70632883204200 C 0 0 0 0 0 21582122 1544 62643 6303375
10990908 70632904786322 C 0 0 0 0 0 6388607 1576 57752 33283
10990909 70632911174929 C 0 0 0 0 0 101999 1422 40477 33042
10990910 70632911276928 C 0 0 0 0 0 129539 1365 42265 19615
10990911 70632911406467 O 0 0 0 0 0 0 0 0 0root@svr:/tank/test# tail -n 100 /proc/spl/kstat/zfs/dbgmsg
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136156 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136156 sa.c:369:sa_attr_op(): error 2
1622136156 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136156 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136157 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136157 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136157 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136157 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136157 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136157 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136157 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136157 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136157 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136157 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136157 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136157 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136157 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136157 sa.c:369:sa_attr_op(): error 2
1622136157 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136157 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136157 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136157 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136157 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136157 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136157 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136157 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136157 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136157 sa.c:369:sa_attr_op(): error 2
1622136157 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136157 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136158 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136158 sa.c:369:sa_attr_op(): error 2
1622136158 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136158 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136158 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136158 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136158 sa.c:369:sa_attr_op(): error 2
1622136158 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136158 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136158 dsl_dir.c:1331:dsl_dir_tempreserve_impl(): error 28
1622136158 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136158 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136158 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136158 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136158 dmu.c:455:dmu_spill_hold_existing(): error 2
1622136158 sa.c:369:sa_attr_op(): error 2
1622136158 zfs_dir.c:1154:zfs_get_xattrdir(): error 2
1622136158 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136158 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136158 zap_micro.c:1611:zap_cursor_retrieve(): error 2
1622136158 zap_micro.c:1611:zap_cursor_retrieve(): error 2 |
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Answered by
jxdking
May 29, 2021
Replies: 2 comments
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Found the answer by myself. |
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0 replies
Answer selected by
jxdking
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Attempt to fix #12184 |
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Found the answer by myself.
It is related autotrim activities. You can verify it by set autotrim=off.
It seems not to affect performance very much.