Hi Dan, Thanks for the prompt response. But why the arc misses if I repeat the du and why is the L2arc size from arcstat much bigger than from zpool iostat?
Dan McDonald wrote: >> On Mar 17, 2017, at 4:12 AM, Richard Skelton <skelt...@btconnect.com> wrote: >> >> Why does du generate writes? >> Is this normal? >> > > If you've L2ARC, it'd make sense that du (a program that traverses tons of > directories if not more to find out how many blocks and/or bytes each file > holds) would change the usage patterns AND that it would get cached in your > L2ARC device. Caches are written when usage patterns change. > > So yes, it's expected behavior: caches change based on usage patterns, and > "du -sh *" changes your usage to "read every directory". > > Hope this helps, > Dan > > >
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