---
title: vmware-vsan-for-experts-storage-io-visibility-histograms - Codenotary
description: VMware vSAN performance monitoring and tuning using storage I/O histograms
image: https://opvizor.com/hubfs/Imported_Blog_Media/vsan_diskgroups_stats_histogram-1.png
---

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 Dec 15, 2022

# VMware vSAN performance monitoring and tuning using storage I/O histograms

 By  [Dennis](https://opvizor.com/blog/author/dennis)  ·   1 minute read

Many customers and VMware experts are using VMware vSAN as a storage system. When it comes to performance tuning, storage histogram views for I/O are essential.

Opvizor delivers many dashboards out of the box, which makes performance monitoring and tuning very efficient.

![](https://opvizor.com/hubfs/image-png-Dec-18-2022-10-53-49-6917-AM.png)

Everybody working in the storage field knows, that the efficiency of caching and eventually the whole disk/raid architecture depends on matching the real IO pattern. Unfortunately, most people don´t know the IO request that is handled by the storage system at a certain point in time.

Opvizor changes that.

Our storage I/O visibility integration for VMware vSAN, allows the IT admin to check for block sizes and read/write ratio over a chosen time range.

![vsan\_diskgroups\_stats\_histogram](https://opvizor.com/hs-fs/hubfs/Imported%20sitepage%20images/vsan_diskgroups_stats_histogram.png?width=779&height=287&name=vsan_diskgroups_stats_histogram.png)

Within the Dashboard VMware vSAN: Storage Diskgroup Stats and VMware vSAN: Cache Diskgroup Stats you can find 4 new histogram widgets, showing:

- Read requests by block size
- Write requests by block size
- Read request latency
- Write request latency

![vsan\_diskgroups\_histogram](https://opvizor.com/hs-fs/hubfs/Imported%20sitepage%20images/vsan_diskgroups_histogram.png?width=673&height=285&name=vsan_diskgroups_histogram.png)

Btw. we´re currently also working on a per VM and per VMDK integration, so you can create a real storage profile of your running systems.

To get the new integration up and running, just start a trial or reach out to our sales or support team to get a license.<https://storage.googleapis.com/opvizor/pa_patch/patch_492_vsan.bin>

If you don´t use Opvizor yet, just start a free trial now and get the vSAN extension going.

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