topic Re: Adaptive read ahead caching? in ONTAP Discussions https://community.netapp.com/t5/ONTAP-Discussions/Adaptive-read-ahead-caching/m-p/12216#M2798 <HTML><HEAD></HEAD><BODY><P>You can try to disable read-ahead via "vol options &lt;volname&gt; minra off" in "advanced" mode and test your volume / LUN performance.</P></BODY></HTML> Fri, 30 Dec 2011 15:48:15 GMT vladimirzhigulin 2011-12-30T15:48:15Z Adaptive read ahead caching? https://community.netapp.com/t5/ONTAP-Discussions/Adaptive-read-ahead-caching/m-p/12211#M2797 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>is there is any way(measure) "adaptive read ahead caching" in action on per LUN/FlexVol basis ? I'm not trying to solve any particular problem - just interested in internals.</P><P></P><P>Is that as easy as verfing this from statit?</P><P></P><P><SPAN style="font-family: courier new,courier;">&nbsp;&nbsp;&nbsp;&nbsp; 24.21 blocks read&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1474.05 blocks read-ahead<BR />&nbsp;&nbsp;&nbsp; 158.97 chains read-ahead&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 18.06 dummy reads<BR />&nbsp;&nbsp;&nbsp; 881.18 blocks speculative read-ahead&nbsp;&nbsp; 7345.70 blocks written</SPAN></P><P></P><P>-J.</P><P></P><P>Message was edited by: jakub.wartak</P></BODY></HTML> Thu, 05 Jun 2025 06:57:52 GMT https://community.netapp.com/t5/ONTAP-Discussions/Adaptive-read-ahead-caching/m-p/12211#M2797 jakub_wartak 2025-06-05T06:57:52Z Re: Adaptive read ahead caching? https://community.netapp.com/t5/ONTAP-Discussions/Adaptive-read-ahead-caching/m-p/12216#M2798 <HTML><HEAD></HEAD><BODY><P>You can try to disable read-ahead via "vol options &lt;volname&gt; minra off" in "advanced" mode and test your volume / LUN performance.</P></BODY></HTML> Fri, 30 Dec 2011 15:48:15 GMT https://community.netapp.com/t5/ONTAP-Discussions/Adaptive-read-ahead-caching/m-p/12216#M2798 vladimirzhigulin 2011-12-30T15:48:15Z