With vSphere 4.1, VMware released a great new feature called Memory compression. At first, after reading the release notes I thought memory compression was just one step before swapping to disk would occur. However, after reading the whitepaper “Understanding Memory Resource Management in VMware ESX 4” I learned some more details I want to share [...]
Some time ago I wrote a posting on how to use vscsiStats to gather even more data from your VMs and their SCSI performance ( See: Using vscsiStats – the full how-to). Last week I received an e-mail from Paul Dunn who had written an Excel macro that can read the output from the vscsiStats [...]
There was a good discussion on twitter on memory overcommit and the value of memory overcommit and whether you should or should not use it in production. What struck me in this was that on a subject like this, there is so much misunderstanding although there is a lot of documentation available that can explain [...]
After reading verbeieren’s blog about vscsiStats, I was very interested to see what this tool could bring me. So I started to play with it and found that I needed some extra hints to get me started. Enough for another blogpost I thought.
With vscsiStats you can monitor the IO through the virtual SCSI controller of [...]
I frequently read postings on different forums about what the best LUN size is and I thought I’d write a post about it on how I usually do it.
First of all, there is no ideal LUN size that suites all environments. But I think there is a general calculation you can use to come to [...]
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