Constant ARC Requests demand_metadata on idle server

merrellb

Cadet
Joined
Dec 14, 2020
Messages
3
I am seeing almost continuous periodic ARC Requests demand_metadata on an otherwise idle FreeNAS Core server. I've disabled ALL services in the UI (I normally run SSH, SMB and SMART) and the pattern continues. I am not seeing any performance impact from this (presumably because all of the requests are going to ARC) but find it a bit concerning there are hundreds of thousands of requests for what seems like no obvious reason. Anyone know what is going on?
 

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Joined
Oct 22, 2019
Messages
3,641
System Dataset, maybe? I get the same thing on my FreeTrueNAS Core server.
 

merrellb

Cadet
Joined
Dec 14, 2020
Messages
3
Good to know someone else is seeing the same thing. The fact that it appears every minute seems noteworthy (with a spike every 5 minutes) suggests it is some automated process. Still 500k+ requests seems like an incredible number for routine process?
 

Martin Jones

Dabbler
Joined
Feb 9, 2016
Messages
48
Yeah, I'm seeing same thing.
 

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