Contents
When to set maxprocesses to 0 on Numa hardware?
When it is set to 0 on NUMA hardware, IIS will launch as many worker processes as there are NUMA nodes on the system so that there is a 1:1 affinity between the worker processes and NUMA nodes. On such systems, you should set the maxProcesses value to 0 to achieve maximum performance.
What do I need to know about Intel benchmarks?
Benchmark your CPU using a program like Intel® Extreme Tuning Utility (Intel® XTU) to evaluate performance gains after an overclock. CPU Benchmarking Tests & Tools CPU reviewers rely on a range of different CPU benchmark tests to evaluate CPUs.
How does IIs improve performance on NUMA nodes?
To utilize these capabilities, IIS 8 (which is part of Windows Server 2012) and above offers features to enhance performance on NUMA hardware. This enables IIS to intelligently affinitize worker processes to NUMA nodes and provide better utilization of the CPUs.
How are processes spread out in a NUMA system?
The operating system, by default, assigns each process to the next NUMA node in the system using a “round-robin” algorithm on a NUMA system. The worker processes are spread out evenly because Windows chooses the NUMA node based on this “round-robin” algorithm and soft affinitizes the processes to NUMA nodes.
How to balance SQL Server Core licenses across NUMA nodes?
If you have already installed SQL Server Standard Edition on a multi-socket machine that exceeds the license limits, you can balance the SQL Server Core licenses across your NUMA nodes. This will minimize the performance impact of the license limit.
How to determine NUMA node boundaries for modern CPUs?
Microsoft provides the following guidance to help calculate this: “ In most cases you can determine your NUMA node boundaries by dividing the amount of physical RAM by the number of logical processors (cores). It is recommended that you read the following articles: Looking for that last ounce of performance?
How are processes affinitized to a NUMA node?
A process is affinitized to a core (or cores that make up a NUMA node) and all threads for the process are executed by the affinitized core. The threads cannot be executed by the other cores on the system, regardless of whether the other cores have extra CPU cycles or not. The threads are contained within the affinitized core. Soft Affinity.