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VM-ware Shared folders are really Slow
I am currently waiting for some code to compile and found a bit of time to type up a quick blog. As described in a previous post, I am have set up my laptop to host Windows in a virtual machine guest...
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One Million IOPS on a 2 socket server
Today, using Fusion ioMemory technology, I worked with our team of experts to hit 1M 4K random read IOPS on Windows. We did this on a 2-socket Sandy Bridge Server. Below is the screenshot to prove it:...
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Kejser’s Law
When speaking at conferences, I often get asked questions about virtualization and how fast databases will run on it (and even if they are “supported” on virtualised systems). This is complex question...
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When Database Statistics are not Enough – Search Patterns
Co-author: Lasse Nedergaard Yesterday, Lasse ran into an issues with a query pattern in the large database that he is responsible for. Based on our conversation, we wrote up this blog and created a...
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Boosting INSERT Speed by Generating Scalable Keys
Throughout history, similar ideas tend to surface at about the same time. Last week, at SQLBits 9, I did some “on stage” tuning of the Paul Randal INSERT challenge. It turns out that at almost the same...
View ArticleI/O Complexity of processing aggregation phase
In my last post I missed the IO complexities of the aggregation phase. My memory of external sorting has become a bit rusty and I once again needed to bring Knuth from my bookshelf. First of all – if...
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