Reservation of memory for the server sqql

Hello

I am running two SQL servers with 4 virtual CPUs and each has 12G of RAM available.

We have noticed that sql process uses only 180MB of RAM while SQL is designed to use all available memory... We decided to use a reservation of memory for these boxes and grant a full 12 GB for each booking.

(1) that would be really useful?

(2) I noticed that after having reserved memory, that the system has taken something like 10 minutes to start, can anyone explain to me why?

Thank you

The shares of resources can be adjusted if necessary. I don't think that you need. As well as the host has only a single virtual machine now, who knows what the future may bring. You add multiple virtual machines and you will start to do the math. ESX let his work resources and balance. If you see performance degradation then start looking at the distribution of resources.

As for the CPU that the virtual machine is not the only object on the system might compete for processor resources, you also have the SC. When you give the VM 4 vCPU find the system to wait on the availability of all hearts.

You can reduce the number to 2 and even play with the processor affinity if you want, you should try to determine the weather your SQL system really needs the CPU/MEM tweaks (in my experience IO is the cause of the headache of performance most SQL).

Tags: VMware

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