NFS client response slowing

When I use nfs to connect the nfs server, I found that the system has slow response. I mount the home directroy from the server. In server, the nfsd process has a sufficaient number. But in the client, I can see a process about the server I connect, and I don not know how to debug this:


Please help me to slove this

Might be connected to NFS clients unresponsive, nfsiostat hangs

I check the nfsiostat, but it seem normal to me:

10.112.242.97:/volume1/SimulationCircuit mounted on /simulation:

           ops/s       rpc bklog
          65.255           0.000

read:              ops/s            kB/s           kB/op         retrans    avg RTT (ms)    avg exe (ms)  avg queue (ms)          errors
                   2.951          35.088          11.889        0 (0.0%)           0.148           0.253           0.097       25 (0.0%)
write:             ops/s            kB/s           kB/op         retrans    avg RTT (ms)    avg exe (ms)  avg queue (ms)          errors
                  11.721         910.293          77.663        0 (0.0%)          12.509         201.854         189.336        0 (0.0%)
10.112.84.146:/volume1/CircuitProject mounted on /home/project:

           ops/s       rpc bklog
         219.482           0.000

read:              ops/s            kB/s           kB/op         retrans    avg RTT (ms)    avg exe (ms)  avg queue (ms)          errors
                   0.551          17.806          32.293        0 (0.0%)           0.509           1.478           0.958        0 (0.0%)
write:             ops/s            kB/s           kB/op         retrans    avg RTT (ms)    avg exe (ms)  avg queue (ms)          errors
                   0.924          50.498          54.633        0 (0.0%)         213.849         326.467         112.611        2 (0.0%)

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