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Signed-off-by: Burak Ok <[email protected]>
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support/azure/azure-kubernetes/availability-performance/identify-high-disk-io-latency-containers-aks.md

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@@ -35,7 +35,7 @@ You may suspect disk I/O latency issues when you observe the following behaviors
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### Step 1: Profile disk I/O latency with `profile_blockio`
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The [`profile_blockio`](https://aka.ms/ig-profile-blockio) gadget gathers information about block device I/O usage and generates a histogram distribution of I/O latency when the gadget is stopped. This helps you visualize disk I/O performance and identify latency patterns. We can use this information to gather evidence to support or refute the hypothesis that the symptoms we are seeing are due to disk I/O issues.
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The [`profile_blockio`](https://aka.ms/ig-profile-blockio) gadget gathers information about block device I/O usage and periodically generates a histogram distribution of I/O latency. This helps you visualize disk I/O performance and identify latency patterns. We can use this information to gather evidence to support or refute the hypothesis that the symptoms we are seeing are due to disk I/O issues.
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```console
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kubectl gadget run profile_blockio --node <node-name>
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The [`top_blockio`](https://aka.ms/ig-top-blockio) gadget provides a periodic list of containers with the highest disk I/O operations. Optionally we can limit the tracing to the node we identified in Step 1. This gadget requires kernel version 6.5 or higher (available on [Azure Linux Container Host clusters](/azure/aks/use-azure-linux)).
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```console
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kubectl gadget run top_blockio --namespace <namespace> [--node <node-name>]
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kubectl gadget run top_blockio --namespace <namespace> --sort -bytes [--node <node-name>]
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```
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Sample output:
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The [`top_file`](https://aka.ms/ig-top-file) gadget reports periodically the read/write activity by file, helping you identify specific processes in which containers are causing high disk activity.
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```console
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kubectl gadget run top_file --namespace <namespace>
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kubectl gadget run top_file --namespace <namespace> --max-entries 20 --sort -wbytes_raw,-rbytes_raw
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```
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Sample output:

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