My disklatencytest showed a longish (14 secs) NFS file system directoty/stat lookup again today on a desktop:
2021-10-04T05:26:19 0.069486 0.069486 0.000570 /home/... 2021-10-04T05:28:19 0.269743 0.538000 0.001019 /home/... 2021-10-04T09:48:00 1.492158 0.003314 0.000907 /home/... 2021-10-04T09:49:02 2.581025 0.159358 0.000836 /home/... 2021-10-04T09:50:44 2.657260 0.076560 0.027128 /home/... 2021-10-04T09:51:30 14.889837 14.889837 0.022132 /home/...
A disklatencytest running on the server shows no long latency today so far.
The sar -d on the server around this time is:
10:49:00 dev8-0 20.14 152.57 246.05 0.00 19.80 0.51 21.48 9.81 10:49:00 dev8-32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:49:00 dev8-16 39.36 1277.08 246.51 0.00 38.71 0.52 11.03 13.06 10:49:00 dev8-48 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:49:00 dev252-0 2.35 0.00 9.39 0.00 4.00 0.00 0.00 0.02 10:50:00 dev8-0 8.38 134.51 80.09 0.00 25.60 0.14 8.90 6.89 10:50:00 dev8-32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:50:00 dev8-16 14.08 286.15 80.09 0.00 26.01 0.16 6.53 7.35 10:50:00 dev8-48 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:50:00 dev252-0 0.80 0.00 3.20 0.00 4.00 0.00 0.00 0.01 10:51:00 dev8-0 7.99 75.65 110.65 0.00 23.31 0.26 23.22 7.33 10:51:00 dev8-32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:51:00 dev8-16 44.98 1704.41 110.65 0.00 40.35 0.30 5.00 12.43 10:51:00 dev8-48 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:51:00 dev252-0 3.86 0.00 15.45 0.00 4.00 0.00 0.01 0.03 10:52:00 dev8-0 21.20 265.73 415.69 0.00 32.15 0.42 16.08 8.64 10:52:00 dev8-32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:52:00 dev8-16 56.56 1603.80 415.69 0.00 35.71 0.45 6.62 12.77 10:52:00 dev8-48 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:52:00 dev252-0 5.23 0.00 20.91 0.00 4.00 0.00 0.02 0.02 10:53:00 dev8-0 12.94 265.40 94.51 0.00 27.82 0.25 14.24 7.29 10:53:00 dev8-32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:53:00 dev8-16 46.35 1747.85 94.51 0.00 39.75 0.32 5.27 11.99 10:53:00 dev8-48 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:53:00 dev252-0 3.60 0.00 14.39 0.00 4.00 0.00 0.01 0.02
and iostats in next email
So nothing obvious on the disks of the server. I am pretty sure this is an NFS issue ...