topic disk reads at 10MB/s with no user activity at all in ONTAP Discussions https://community.netapp.com/t5/ONTAP-Discussions/disk-reads-at-10MB-s-with-no-user-activity-at-all/m-p/762#M100 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>As the title suggests I see (using sysstat) that our filer is busy reading from the disk with 10MB/s with no user activity at all.</P><P></P><P>I am attaching some more detailed performance stats and how they were gathered.</P><P></P><P>Can someone sched light on this?</P><P></P><P>There are snapmirrors configured but they are idle and there are no changes at the moment anyway.</P><P></P><P>Thanks.</P></BODY></HTML> Thu, 05 Jun 2025 05:43:40 GMT JERONIMO123 2025-06-05T05:43:40Z disk reads at 10MB/s with no user activity at all https://community.netapp.com/t5/ONTAP-Discussions/disk-reads-at-10MB-s-with-no-user-activity-at-all/m-p/762#M100 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>As the title suggests I see (using sysstat) that our filer is busy reading from the disk with 10MB/s with no user activity at all.</P><P></P><P>I am attaching some more detailed performance stats and how they were gathered.</P><P></P><P>Can someone sched light on this?</P><P></P><P>There are snapmirrors configured but they are idle and there are no changes at the moment anyway.</P><P></P><P>Thanks.</P></BODY></HTML> Thu, 05 Jun 2025 05:43:40 GMT https://community.netapp.com/t5/ONTAP-Discussions/disk-reads-at-10MB-s-with-no-user-activity-at-all/m-p/762#M100 JERONIMO123 2025-06-05T05:43:40Z Re: disk reads at 10MB/s with no user activity at all https://community.netapp.com/t5/ONTAP-Discussions/disk-reads-at-10MB-s-with-no-user-activity-at-all/m-p/767#M101 <HTML><HEAD></HEAD><BODY><P>According to support this is normal. "The only reason you would have 0 across all these fields is if the filer was turned off."</P><P></P><P>Even so, it is strange that sometimes it's really low (close to 0) and sometimes really high (I believe I saw values around 1GB/s)........</P><P></P><P> CPU&nbsp;&nbsp; Total&nbsp;&nbsp;&nbsp;&nbsp; Net&nbsp;&nbsp; kB/s&nbsp;&nbsp;&nbsp; Disk&nbsp;&nbsp; kB/s&nbsp;&nbsp;&nbsp; Tape&nbsp;&nbsp; kB/s&nbsp; Cache&nbsp; Cache&nbsp;&nbsp;&nbsp; CP&nbsp; CP&nbsp; Disk</P><P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ops/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; in&nbsp;&nbsp;&nbsp; out&nbsp;&nbsp;&nbsp; read&nbsp; write&nbsp;&nbsp;&nbsp; read&nbsp; write&nbsp;&nbsp;&nbsp; age&nbsp;&nbsp;&nbsp; hit&nbsp; time&nbsp; ty&nbsp; util</P><P> 25%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; 125648&nbsp;&nbsp;&nbsp;&nbsp; 16&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 20s&nbsp;&nbsp;&nbsp; 93%&nbsp;&nbsp;&nbsp; 0%&nbsp; -&nbsp;&nbsp;&nbsp; 80%</P><P> 23%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; 186792&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 20s&nbsp;&nbsp;&nbsp; 95%&nbsp;&nbsp;&nbsp; 0%&nbsp; -&nbsp;&nbsp;&nbsp; 94%</P><P> 22%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; 193341&nbsp;&nbsp;&nbsp;&nbsp; 21&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 20s&nbsp;&nbsp;&nbsp; 94%&nbsp;&nbsp;&nbsp; 0%&nbsp; -&nbsp;&nbsp;&nbsp; 81%</P><P> 88%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; 801715&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 36s&nbsp;&nbsp;&nbsp; 84%&nbsp;&nbsp; 66%&nbsp; Z&nbsp;&nbsp;&nbsp; 91%</P><P> 48%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; 466656&nbsp;&nbsp; 1859&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 36s&nbsp;&nbsp; 100%&nbsp;&nbsp; 56%&nbsp; :&nbsp;&nbsp;&nbsp; 51%</P><P>&nbsp; 1%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 7168&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 36s&nbsp;&nbsp; 100%&nbsp;&nbsp;&nbsp; 0%&nbsp; -&nbsp;&nbsp;&nbsp;&nbsp; 5%</P><P> 52%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; 989968&nbsp;&nbsp;&nbsp;&nbsp; 16&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 36s&nbsp;&nbsp;&nbsp; 90%&nbsp;&nbsp;&nbsp; 0%&nbsp; -&nbsp;&nbsp;&nbsp; 93%</P><P> 48%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; 935253&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 36s&nbsp;&nbsp; 100%&nbsp;&nbsp;&nbsp; 0%&nbsp; -&nbsp;&nbsp;&nbsp; 98%</P><P> 47%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; 930139&nbsp;&nbsp;&nbsp;&nbsp; 16&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 36s&nbsp;&nbsp; 100%&nbsp;&nbsp;&nbsp; 0%&nbsp; -&nbsp;&nbsp;&nbsp; 95%</P><P> 51%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; 993280&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 36s&nbsp;&nbsp; 100%&nbsp;&nbsp;&nbsp; 0%&nbsp; -&nbsp;&nbsp;&nbsp; 97%</P><P> 50%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; 984752&nbsp;&nbsp;&nbsp;&nbsp; 16&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 36s&nbsp;&nbsp; 100%&nbsp;&nbsp;&nbsp; 0%&nbsp; -&nbsp;&nbsp;&nbsp; 97%</P><P> 14%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; 263008&nbsp;&nbsp; 1485&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 36s&nbsp;&nbsp;&nbsp; 99%&nbsp;&nbsp; 16%&nbsp; T&nbsp;&nbsp;&nbsp; 33%</P><P> 10%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; 193541&nbsp;&nbsp;&nbsp;&nbsp; 21&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 36s&nbsp;&nbsp; 100%&nbsp;&nbsp;&nbsp; 0%&nbsp; -&nbsp;&nbsp;&nbsp; 24%</P></BODY></HTML> Tue, 24 Jun 2014 19:50:51 GMT https://community.netapp.com/t5/ONTAP-Discussions/disk-reads-at-10MB-s-with-no-user-activity-at-all/m-p/767#M101 JERONIMO123 2014-06-24T19:50:51Z