topic Applying QoS limit of 500 IOPS to a Volume consuming ~200 IOPS and latency goes crazy in ONTAP Discussions https://community.netapp.com/t5/ONTAP-Discussions/Applying-QoS-limit-of-500-IOPS-to-a-Volume-consuming-200-IOPS-and-latency-goes/m-p/113065#M23963 <P>Why when we apply a QoS Policy of 500 IOPS to a Volume consuming ~200 IOPS the latency goes up?</P><P>&nbsp;</P><P>The QoS policy is not shared among other volumes, 1 QoS policy -&gt; 1 volume. We are running ONTAP 8.3.1</P><P>&nbsp;</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper" image-alt="qos_latency.png" style="width: 999px;"><img src="https://community.netapp.com/t5/image/serverpage/image-id/4350iF92F1B0248B5F808/image-size/large?v=v2&amp;px=999" role="button" title="qos_latency.png" alt="qos_latency.png" /></span></P><P>&nbsp;</P><P>Note: image from grafana &amp; netapp harvest</P> Wed, 04 Jun 2025 22:39:49 GMT Nexica 2025-06-04T22:39:49Z Applying QoS limit of 500 IOPS to a Volume consuming ~200 IOPS and latency goes crazy https://community.netapp.com/t5/ONTAP-Discussions/Applying-QoS-limit-of-500-IOPS-to-a-Volume-consuming-200-IOPS-and-latency-goes/m-p/113065#M23963 <P>Why when we apply a QoS Policy of 500 IOPS to a Volume consuming ~200 IOPS the latency goes up?</P><P>&nbsp;</P><P>The QoS policy is not shared among other volumes, 1 QoS policy -&gt; 1 volume. We are running ONTAP 8.3.1</P><P>&nbsp;</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper" image-alt="qos_latency.png" style="width: 999px;"><img src="https://community.netapp.com/t5/image/serverpage/image-id/4350iF92F1B0248B5F808/image-size/large?v=v2&amp;px=999" role="button" title="qos_latency.png" alt="qos_latency.png" /></span></P><P>&nbsp;</P><P>Note: image from grafana &amp; netapp harvest</P> Wed, 04 Jun 2025 22:39:49 GMT https://community.netapp.com/t5/ONTAP-Discussions/Applying-QoS-limit-of-500-IOPS-to-a-Volume-consuming-200-IOPS-and-latency-goes/m-p/113065#M23963 Nexica 2025-06-04T22:39:49Z