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Constant Cache Pool Reads

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After a recent hardware upgrade (new mobo/CPUs) I found that a number of my docker containers were performing poorly. I've also noticed that my cache pool is seeing constant reads @ 10-40 MB/s per drive. I don't know for sure this is the cause, but it seems a likely place to start. Cache configuration is 6x250GB SSD in raidz2.

image.thumb.png.649558c42a590d5afa4465bbc5c89005.png

 

File Activity and Active Streams plugins show no activity at all.

 

lsof | grep /mnt/cache

 

Shows a couple log files open by rsyslogd and znapzend, and a bajillion lines of "lsof: no pwd entry for UID 1883/999"

999 lines extend below this screenshot for more than 1000 lines (estimated).

image.thumb.png.173ec1f0961a6ab6e8b61ca54ca06903.png

 

iostat doesn't seem to exist on Unraid (command not found).

 

 

Can someone assist with tracking down this issue?

Solved by Renegade605

  • Author
  • Solution

Bump

  • Community Expert

You can disable docker and VM services and boot in safe mode, if not reads reboot in normal mode, if still no reads plugins are ruled out, start enabling the services and VMs/containers one by one.

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