Long a/syncq_wait times for 1 disk in a raidz vdev #16160

vladatnyc · 2024-05-03T16:00:35Z

vladatnyc
May 3, 2024

tl;dr: I’m seeing 50-100x longer (a)syncq_wait read times for one drive in a 4 drive raidz2 vdev than the other 3 drives. It’s always just one drive, but it’s not the same drive all the time.

I have a raidz2 pool, r2d2, setup on 4 identical drives (Exos x16 14 TB). I ran a recursive hashing task (hashdeep) on the pool and saw pretty poor performance, 40MB/s from each drive. Given that the task is largely sequential reads I would have expected better throughput. I replicated the pool onto a single disk pool (also an Exos x16 14TB drive) and with the same task saw approximately 150MB/s speeds. Digging in deeper I ran zpool iostat -vyl 30 1

                                            capacity     operations     bandwidth    total_wait     disk_wait    syncq_wait    asyncq_wait  scrub   trim  rebuild
pool                                      alloc   free   read  write   read  write   read  write   read  write   read  write   read  write   wait   wait   wait
----------------------------------------  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----
r2d2                                      18.9T  32.0T  2.64K      0   167M      0  311ms      -    4ms      -     1s      -  255ms      -      -      -      -
  raidz2-0                                18.9T  32.0T  2.64K      0   167M      0  311ms      -    4ms      -     1s      -  255ms      -      -      -      -
    xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxxbe1a      -      -    691      0  41.7M      0   26ms      -    2ms      -      -      -   23ms      -      -      -      -
    xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxxe276      -      -    699      0  41.8M      0   24ms      -    2ms      -      -      -   21ms      -      -      -      -
    xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxx32f5      -      -    701      0  41.8M      0   27ms      -    2ms      -      -      -   24ms      -      -      -      -
    xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxx2b14      -      -    612      0  42.0M      0     1s      -    9ms      -     1s      -     1s      -      -      -      -
----------------------------------------  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----
r2d2-clone                                9.17T  3.55T    169      0   162M      0     2s      -   81ms      -     2s      -     3s      -      -      -      -
    xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxxad21  9.17T  3.55T    169      0   162M      0     2s      -   81ms      -     2s      -     3s      -      -      -      -
----------------------------------------  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----

As you can see above, one member of the raidz2-0 vdev has (a)syncq_wait times that are 50x longer than the other 3 drives. My first thought was that maybe the drive was failing. But when I checked zpool iostat again sometime later, it was a different member that was exhibiting the longer wait times. I then monitored the output and saw that there is always one member of the vdev that is exhibiting these extended (a)syncq_wait times and that member changes over time.

Below is zpool iostat -vyw 30 1 output. Similar story to the output above, 3 members seem to have q_wait times that are between 1-500ms, and one member where they are 500ms-2s.This was run a few minutes after the output above and you can see that it’s now a different drive (32f5 vs 2b14) that is exhibiting the longer wait times.

Click to see full `zpool iostat -vyw 30 1` putput

r2d2                                       total_wait     disk_wait    syncq_wait    asyncq_wait
latency                                    read  write   read  write   read  write   read  write  scrub   trim  rebuild
----------------------------------------  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----
1ns                                           0      0      0      0      0      0      0      0      0      0      0
3ns                                           0      0      0      0      0      0      0      0      0      0      0
7ns                                           0      0      0      0      0      0      0      0      0      0      0
15ns                                          0      0      0      0      0      0      0      0      0      0      0
31ns                                          0      0      0      0      0      0      0      0      0      0      0
63ns                                          0      0      0      0      0      0      0      0      0      0      0
127ns                                         0      0      0      0      0      0      0      0      0      0      0
255ns                                         0      0      0      0      0      0    104      0      0      0      0
511ns                                         0      0      0      0      0      0    483      0      0      0      0
1us                                           0      0      0      0      0      0    132      0      0      0      0
2us                                           0      0      0      0      0      0      2      0      0      0      0
4us                                           0      0      0      0      0      0      0      0      0      0      0
8us                                           0      0      0      0      0      0      0      0      0      0      0
16us                                          0      0      0      0      0      0      1      0      0      0      0
32us                                          0      0      0      0      0      0      1      0      0      0      0
65us                                          2      0      2      0      0      0      3      0      0      0      0
131us                                       134      0    137      0      0      0      6      0      0      0      0
262us                                       406      0    469      0      0      0      9      0      0      0      0
524us                                        61      0    352      0      0      0     16      0      0      0      0
1ms                                          28      0    190      0      0      0     25      0      0      0      0
2ms                                          38      0  1.05K      0      0      0     46      0      0      0      0
4ms                                          81      0    324      0      0      0     78      0      0      0      0
8ms                                         151      0     68      0      0      0    140      0      0      0      0
16ms                                        275      0    196      0      0      0    232      0      0      0      0
33ms                                        346      0    131      0      0      0    295      0      0      0      0
67ms                                        329      0     33      0      0      0    301      0      0      0      0
134ms                                       242      0      5      0      0      0    225      0      0      0      0
268ms                                       191      0      1      0      0      0    187      0      0      0      0
536ms                                       139      0      0      0      4      0    134      0      0      0      0
1s                                          252      0      0      0     63      0    194      0      0      0      0
2s                                          308      0      0      0     72      0    229      0      0      0      0
4s                                            0      0      0      0      0      0      0      0      0      0      0
8s                                            0      0      0      0      0      0      0      0      0      0      0
17s                                           0      0      0      0      0      0      0      0      0      0      0
34s                                           0      0      0      0      0      0      0      0      0      0      0
68s                                           0      0      0      0      0      0      0      0      0      0      0
137s                                          0      0      0      0      0      0      0      0      0      0      0
---------------------------------------------------------------------------------------------------------------------

raidz2-0                                   total_wait     disk_wait    syncq_wait    asyncq_wait
latency                                    read  write   read  write   read  write   read  write  scrub   trim  rebuild
----------------------------------------  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----
1ns                                           0      0      0      0      0      0      0      0      0      0      0
3ns                                           0      0      0      0      0      0      0      0      0      0      0
7ns                                           0      0      0      0      0      0      0      0      0      0      0
15ns                                          0      0      0      0      0      0      0      0      0      0      0
31ns                                          0      0      0      0      0      0      0      0      0      0      0
63ns                                          0      0      0      0      0      0      0      0      0      0      0
127ns                                         0      0      0      0      0      0      0      0      0      0      0
255ns                                         0      0      0      0      0      0    104      0      0      0      0
511ns                                         0      0      0      0      0      0    483      0      0      0      0
1us                                           0      0      0      0      0      0    132      0      0      0      0
2us                                           0      0      0      0      0      0      2      0      0      0      0
4us                                           0      0      0      0      0      0      0      0      0      0      0
8us                                           0      0      0      0      0      0      0      0      0      0      0
16us                                          0      0      0      0      0      0      1      0      0      0      0
32us                                          0      0      0      0      0      0      1      0      0      0      0
65us                                          2      0      2      0      0      0      3      0      0      0      0
131us                                       134      0    137      0      0      0      6      0      0      0      0
262us                                       406      0    469      0      0      0      9      0      0      0      0
524us                                        61      0    352      0      0      0     16      0      0      0      0
1ms                                          28      0    190      0      0      0     25      0      0      0      0
2ms                                          38      0  1.05K      0      0      0     46      0      0      0      0
4ms                                          81      0    324      0      0      0     78      0      0      0      0
8ms                                         151      0     68      0      0      0    140      0      0      0      0
16ms                                        275      0    196      0      0      0    232      0      0      0      0
33ms                                        346      0    131      0      0      0    295      0      0      0      0
67ms                                        329      0     33      0      0      0    301      0      0      0      0
134ms                                       242      0      5      0      0      0    225      0      0      0      0
268ms                                       191      0      1      0      0      0    187      0      0      0      0
536ms                                       139      0      0      0      4      0    134      0      0      0      0
1s                                          252      0      0      0     63      0    194      0      0      0      0
2s                                          308      0      0      0     72      0    229      0      0      0      0
4s                                            0      0      0      0      0      0      0      0      0      0      0
8s                                            0      0      0      0      0      0      0      0      0      0      0
17s                                           0      0      0      0      0      0      0      0      0      0      0
34s                                           0      0      0      0      0      0      0      0      0      0      0
68s                                           0      0      0      0      0      0      0      0      0      0      0
137s                                          0      0      0      0      0      0      0      0      0      0      0
---------------------------------------------------------------------------------------------------------------------

xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxxbe1a       total_wait     disk_wait    syncq_wait    asyncq_wait
latency                                    read  write   read  write   read  write   read  write  scrub   trim  rebuild
----------------------------------------  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----
1ns                                           0      0      0      0      0      0      0      0      0      0      0
3ns                                           0      0      0      0      0      0      0      0      0      0      0
7ns                                           0      0      0      0      0      0      0      0      0      0      0
15ns                                          0      0      0      0      0      0      0      0      0      0      0
31ns                                          0      0      0      0      0      0      0      0      0      0      0
63ns                                          0      0      0      0      0      0      0      0      0      0      0
127ns                                         0      0      0      0      0      0      0      0      0      0      0
255ns                                         0      0      0      0      0      0     44      0      0      0      0
511ns                                         0      0      0      0      0      0    160      0      0      0      0
1us                                           0      0      0      0      0      0     47      0      0      0      0
2us                                           0      0      0      0      0      0      0      0      0      0      0
4us                                           0      0      0      0      0      0      0      0      0      0      0
8us                                           0      0      0      0      0      0      0      0      0      0      0
16us                                          0      0      0      0      0      0      0      0      0      0      0
32us                                          0      0      0      0      0      0      0      0      0      0      0
65us                                          0      0      1      0      0      0      1      0      0      0      0
131us                                        47      0     47      0      0      0      2      0      0      0      0
262us                                       142      0    150      0      0      0      3      0      0      0      0
524us                                        22      0    102      0      0      0      5      0      0      0      0
1ms                                           9      0     46      0      0      0      8      0      0      0      0
2ms                                          13      0    263      0      0      0     14      0      0      0      0
4ms                                          26      0     79      0      0      0     27      0      0      0      0
8ms                                          51      0     15      0      0      0     46      0      0      0      0
16ms                                         92      0     44      0      0      0     75      0      0      0      0
33ms                                        110      0     25      0      0      0     94      0      0      0      0
67ms                                        106      0      1      0      0      0     99      0      0      0      0
134ms                                        82      0      0      0      0      0     76      0      0      0      0
268ms                                        54      0      0      0      0      0     53      0      0      0      0
536ms                                        17      0      0      0      0      0     16      0      0      0      0
1s                                            0      0      0      0      0      0      0      0      0      0      0
2s                                            0      0      0      0      0      0      0      0      0      0      0
4s                                            0      0      0      0      0      0      0      0      0      0      0
8s                                            0      0      0      0      0      0      0      0      0      0      0
17s                                           0      0      0      0      0      0      0      0      0      0      0
34s                                           0      0      0      0      0      0      0      0      0      0      0
68s                                           0      0      0      0      0      0      0      0      0      0      0
137s                                          0      0      0      0      0      0      0      0      0      0      0
---------------------------------------------------------------------------------------------------------------------

xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxxe276       total_wait     disk_wait    syncq_wait    asyncq_wait
latency                                    read  write   read  write   read  write   read  write  scrub   trim  rebuild
----------------------------------------  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----
1ns                                           0      0      0      0      0      0      0      0      0      0      0
3ns                                           0      0      0      0      0      0      0      0      0      0      0
7ns                                           0      0      0      0      0      0      0      0      0      0      0
15ns                                          0      0      0      0      0      0      0      0      0      0      0
31ns                                          0      0      0      0      0      0      0      0      0      0      0
63ns                                          0      0      0      0      0      0      0      0      0      0      0
127ns                                         0      0      0      0      0      0      0      0      0      0      0
255ns                                         0      0      0      0      0      0      9      0      0      0      0
511ns                                         0      0      0      0      0      0    195      0      0      0      0
1us                                           0      0      0      0      0      0     50      0      0      0      0
2us                                           0      0      0      0      0      0      1      0      0      0      0
4us                                           0      0      0      0      0      0      0      0      0      0      0
8us                                           0      0      0      0      0      0      0      0      0      0      0
16us                                          0      0      0      0      0      0      0      0      0      0      0
32us                                          0      0      0      0      0      0      0      0      0      0      0
65us                                          1      0      1      0      0      0      1      0      0      0      0
131us                                        48      0     49      0      0      0      2      0      0      0      0
262us                                       143      0    153      0      0      0      3      0      0      0      0
524us                                        22      0    103      0      0      0      5      0      0      0      0
1ms                                           9      0     50      0      0      0      8      0      0      0      0
2ms                                          12      0    259      0      0      0     15      0      0      0      0
4ms                                          29      0     76      0      0      0     25      0      0      0      0
8ms                                          50      0     15      0      0      0     46      0      0      0      0
16ms                                         93      0     44      0      0      0     80      0      0      0      0
33ms                                        116      0     26      0      0      0     97      0      0      0      0
67ms                                        102      0      1      0      0      0     92      0      0      0      0
134ms                                        75      0      0      0      0      0     69      0      0      0      0
268ms                                        58      0      0      0      0      0     57      0      0      0      0
536ms                                        18      0      0      0      0      0     17      0      0      0      0
1s                                            0      0      0      0      0      0      0      0      0      0      0
2s                                            0      0      0      0      0      0      0      0      0      0      0
4s                                            0      0      0      0      0      0      0      0      0      0      0
8s                                            0      0      0      0      0      0      0      0      0      0      0
17s                                           0      0      0      0      0      0      0      0      0      0      0
34s                                           0      0      0      0      0      0      0      0      0      0      0
68s                                           0      0      0      0      0      0      0      0      0      0      0
137s                                          0      0      0      0      0      0      0      0      0      0      0
---------------------------------------------------------------------------------------------------------------------

xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxx32f5       total_wait     disk_wait    syncq_wait    asyncq_wait
latency                                    read  write   read  write   read  write   read  write  scrub   trim  rebuild
----------------------------------------  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----
1ns                                           0      0      0      0      0      0      0      0      0      0      0
3ns                                           0      0      0      0      0      0      0      0      0      0      0
7ns                                           0      0      0      0      0      0      0      0      0      0      0
15ns                                          0      0      0      0      0      0      0      0      0      0      0
31ns                                          0      0      0      0      0      0      0      0      0      0      0
63ns                                          0      0      0      0      0      0      0      0      0      0      0
127ns                                         0      0      0      0      0      0      0      0      0      0      0
255ns                                         0      0      0      0      0      0      0      0      0      0      0
511ns                                         0      0      0      0      0      0      0      0      0      0      0
1us                                           0      0      0      0      0      0      0      0      0      0      0
2us                                           0      0      0      0      0      0      0      0      0      0      0
4us                                           0      0      0      0      0      0      0      0      0      0      0
8us                                           0      0      0      0      0      0      0      0      0      0      0
16us                                          0      0      0      0      0      0      0      0      0      0      0
32us                                          0      0      0      0      0      0      0      0      0      0      0
65us                                          0      0      0      0      0      0      0      0      0      0      0
131us                                         0      0      0      0      0      0      0      0      0      0      0
262us                                         0      0     36      0      0      0      0      0      0      0      0
524us                                         0      0     45      0      0      0      0      0      0      0      0
1ms                                           0      0     47      0      0      0      0      0      0      0      0
2ms                                           0      0    287      0      0      0      0      0      0      0      0
4ms                                           0      0     85      0      0      0      0      0      0      0      0
8ms                                           0      0     22      0      0      0      0      0      0      0      0
16ms                                          0      0     65      0      0      0      0      0      0      0      0
33ms                                          1      0     50      0      0      0      0      0      0      0      0
67ms                                          2      0     27      0      0      0      2      0      0      0      0
134ms                                         5      0      5      0      0      0      5      0      0      0      0
268ms                                        23      0      1      0      0      0     23      0      0      0      0
536ms                                        81      0      0      0      4      0     78      0      0      0      0
1s                                          252      0      0      0     63      0    194      0      0      0      0
2s                                          308      0      0      0     72      0    229      0      0      0      0
4s                                            0      0      0      0      0      0      0      0      0      0      0
8s                                            0      0      0      0      0      0      0      0      0      0      0
17s                                           0      0      0      0      0      0      0      0      0      0      0
34s                                           0      0      0      0      0      0      0      0      0      0      0
68s                                           0      0      0      0      0      0      0      0      0      0      0
137s                                          0      0      0      0      0      0      0      0      0      0      0
---------------------------------------------------------------------------------------------------------------------

xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxx2b14       total_wait     disk_wait    syncq_wait    asyncq_wait
latency                                    read  write   read  write   read  write   read  write  scrub   trim  rebuild
----------------------------------------  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----
1ns                                           0      0      0      0      0      0      0      0      0      0      0
3ns                                           0      0      0      0      0      0      0      0      0      0      0
7ns                                           0      0      0      0      0      0      0      0      0      0      0
15ns                                          0      0      0      0      0      0      0      0      0      0      0
31ns                                          0      0      0      0      0      0      0      0      0      0      0
63ns                                          0      0      0      0      0      0      0      0      0      0      0
127ns                                         0      0      0      0      0      0      0      0      0      0      0
255ns                                         0      0      0      0      0      0     51      0      0      0      0
511ns                                         0      0      0      0      0      0    127      0      0      0      0
1us                                           0      0      0      0      0      0     34      0      0      0      0
2us                                           0      0      0      0      0      0      0      0      0      0      0
4us                                           0      0      0      0      0      0      0      0      0      0      0
8us                                           0      0      0      0      0      0      0      0      0      0      0
16us                                          0      0      0      0      0      0      0      0      0      0      0
32us                                          0      0      0      0      0      0      0      0      0      0      0
65us                                          0      0      0      0      0      0      0      0      0      0      0
131us                                        39      0     39      0      0      0      1      0      0      0      0
262us                                       120      0    129      0      0      0      3      0      0      0      0
524us                                        17      0    100      0      0      0      5      0      0      0      0
1ms                                           9      0     45      0      0      0      8      0      0      0      0
2ms                                          11      0    268      0      0      0     15      0      0      0      0
4ms                                          25      0     83      0      0      0     25      0      0      0      0
8ms                                          48      0     15      0      0      0     46      0      0      0      0
16ms                                         88      0     41      0      0      0     76      0      0      0      0
33ms                                        117      0     29      0      0      0    102      0      0      0      0
67ms                                        118      0      1      0      0      0    106      0      0      0      0
134ms                                        78      0      0      0      0      0     73      0      0      0      0
268ms                                        55      0      0      0      0      0     53      0      0      0      0
536ms                                        22      0      0      0      0      0     22      0      0      0      0
1s                                            0      0      0      0      0      0      0      0      0      0      0
2s                                            0      0      0      0      0      0      0      0      0      0      0
4s                                            0      0      0      0      0      0      0      0      0      0      0
8s                                            0      0      0      0      0      0      0      0      0      0      0
17s                                           0      0      0      0      0      0      0      0      0      0      0
34s                                           0      0      0      0      0      0      0      0      0      0      0
68s                                           0      0      0      0      0      0      0      0      0      0      0
137s                                          0      0      0      0      0      0      0      0      0      0      0
---------------------------------------------------------------------------------------------------------------------

r2d2-clone                                 total_wait     disk_wait    syncq_wait    asyncq_wait
latency                                    read  write   read  write   read  write   read  write  scrub   trim  rebuild
----------------------------------------  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----
1ns                                           0      0      0      0      0      0      0      0      0      0      0
3ns                                           0      0      0      0      0      0      0      0      0      0      0
7ns                                           0      0      0      0      0      0      0      0      0      0      0
15ns                                          0      0      0      0      0      0      0      0      0      0      0
31ns                                          0      0      0      0      0      0      0      0      0      0      0
63ns                                          0      0      0      0      0      0      0      0      0      0      0
127ns                                         0      0      0      0      0      0      0      0      0      0      0
255ns                                         0      0      0      0      0      0      0      0      0      0      0
511ns                                         0      0      0      0      0      0      0      0      0      0      0
1us                                           0      0      0      0      0      0      0      0      0      0      0
2us                                           0      0      0      0      0      0      0      0      0      0      0
4us                                           0      0      0      0      0      0      0      0      0      0      0
8us                                           0      0      0      0      0      0      0      0      0      0      0
16us                                          0      0      0      0      0      0      0      0      0      0      0
32us                                          0      0      0      0      0      0      0      0      0      0      0
65us                                          0      0      0      0      0      0      0      0      0      0      0
131us                                         0      0      0      0      0      0      0      0      0      0      0
262us                                         0      0      0      0      0      0      0      0      0      0      0
524us                                         0      0      0      0      0      0      0      0      0      0      0
1ms                                           0      0      0      0      0      0      0      0      0      0      0
2ms                                           0      0     22      0      0      0      0      0      0      0      0
4ms                                           0      0      9      0      0      0      0      0      0      0      0
8ms                                           0      0     11      0      0      0      0      0      0      0      0
16ms                                          0      0     38      0      0      0      0      0      0      0      0
33ms                                          0      0      8      0      0      0      0      0      0      0      0
67ms                                          0      0     14      0      0      0      0      0      0      0      0
134ms                                         0      0     19      0      0      0      0      0      0      0      0
268ms                                         1      0     29      0      1      0      0      0      0      0      0
536ms                                         4      0      9      0      3      0      0      0      0      0      0
1s                                            6      0      0      0      7      0      0      0      0      0      0
2s                                           15      0      0      0     15      0      0      0      0      0      0
4s                                          120      0      0      0     65      0     56      0      0      0      0
8s                                           14      0      0      0      3      0      7      0      0      0      0
17s                                           0      0      0      0      0      0      0      0      0      0      0
34s                                           0      0      0      0      0      0      0      0      0      0      0
68s                                           0      0      0      0      0      0      0      0      0      0      0
137s                                          0      0      0      0      0      0      0      0      0      0      0
---------------------------------------------------------------------------------------------------------------------

xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxxad21       total_wait     disk_wait    syncq_wait    asyncq_wait
latency                                    read  write   read  write   read  write   read  write  scrub   trim  rebuild
----------------------------------------  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----  -----
1ns                                           0      0      0      0      0      0      0      0      0      0      0
3ns                                           0      0      0      0      0      0      0      0      0      0      0
7ns                                           0      0      0      0      0      0      0      0      0      0      0
15ns                                          0      0      0      0      0      0      0      0      0      0      0
31ns                                          0      0      0      0      0      0      0      0      0      0      0
63ns                                          0      0      0      0      0      0      0      0      0      0      0
127ns                                         0      0      0      0      0      0      0      0      0      0      0
255ns                                         0      0      0      0      0      0      0      0      0      0      0
511ns                                         0      0      0      0      0      0      0      0      0      0      0
1us                                           0      0      0      0      0      0      0      0      0      0      0
2us                                           0      0      0      0      0      0      0      0      0      0      0
4us                                           0      0      0      0      0      0      0      0      0      0      0
8us                                           0      0      0      0      0      0      0      0      0      0      0
16us                                          0      0      0      0      0      0      0      0      0      0      0
32us                                          0      0      0      0      0      0      0      0      0      0      0
65us                                          0      0      0      0      0      0      0      0      0      0      0
131us                                         0      0      0      0      0      0      0      0      0      0      0
262us                                         0      0      0      0      0      0      0      0      0      0      0
524us                                         0      0      0      0      0      0      0      0      0      0      0
1ms                                           0      0      0      0      0      0      0      0      0      0      0
2ms                                           0      0     22      0      0      0      0      0      0      0      0
4ms                                           0      0      9      0      0      0      0      0      0      0      0
8ms                                           0      0     11      0      0      0      0      0      0      0      0
16ms                                          0      0     38      0      0      0      0      0      0      0      0
33ms                                          0      0      8      0      0      0      0      0      0      0      0
67ms                                          0      0     14      0      0      0      0      0      0      0      0
134ms                                         0      0     19      0      0      0      0      0      0      0      0
268ms                                         1      0     29      0      1      0      0      0      0      0      0
536ms                                         4      0      9      0      3      0      0      0      0      0      0
1s                                            6      0      0      0      7      0      0      0      0      0      0
2s                                           15      0      0      0     15      0      0      0      0      0      0
4s                                          120      0      0      0     65      0     56      0      0      0      0
8s                                           14      0      0      0      3      0      7      0      0      0      0
17s                                           0      0      0      0      0      0      0      0      0      0      0
34s                                           0      0      0      0      0      0      0      0      0      0      0
68s                                           0      0      0      0      0      0      0      0      0      0      0
137s                                          0      0      0      0      0      0      0      0      0      0      0
---------------------------------------------------------------------------------------------------------------------

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Long a/syncq_wait times for 1 disk in a raidz vdev #16160

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Long a/syncq_wait times for 1 disk in a raidz vdev #16160

vladatnyc May 3, 2024

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vladatnyc
May 3, 2024