Storage I/O control for critical apps is a great idea

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Recently, I have been asked this question: should we enable Storage I/O control on datastores used by our production databases considering it could prevent my VMs from consuming all the resources they need? The answer is yes, SIOC will not harm your performance, actually it can save you from a very bad day in IT land, and it’s Read more...

Hyper-threading doesn’t count for virtual SQL licensing

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There’s a fair bit of confusion around licensing SQL that is virtualized and I have been getting questions from customers about this for a long time now. The confusion comes from a few statements in the  Microsoft SQL Server 2014 Virtualization Licensing Guide guide which states: “For customers using Intel’s hyper-threading technology to split a single, physical core into Read more...

Disabling TPS in vSphere – Impact on Critical Applications

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Starting with update releases in December, 2014, VMware vSphere will default to a new configuration for the Transparent Page Sharing (TPS) feature. Unlike in prior versions of vSphere up to that point, TPS will be DISABLED by default. TPS will continued to be disabled for all future versions of vSphere. In the interim, VMware has Read more...