- Tag: Tuning
Posts tagged Tuning
Selecting the number and type of AMIs to run a Hadoop job flow most efficiently.
Feed: AWS Compute Blog. Author: Stefano Buliani. This is a guest post from Linda Hedges, Principal SA, High Performance Computing.—–One question we often hear is, “How well will my application scale on AWS?” For high performance computing (HPC) workloads that cross multiple nodes, the cluster network is at the heart of scalability concerns. AWS uses advanced Ethernet networking technology, which, like all things AWS, is designed for scale, security, high availability, and low cost. This network is exceptional and continues to benefit from Amazon’s rapid pace of development. Again and again, customers find that the most demanding applications run very ... Read More
Feed: Planet PostgreSQL. It’s a common misconception that high volume read-write workloads in PostgreSQL inevitably causes database inefficiency. We’ve heard of cases where users encounter slowdowns doing only a few hundred writes per second and turn to systems like Dynamo or Cassandra out of frustration. However PostgreSQL can handle these workloads without a problem as long as it is configured correctly. The problems stem from what’s known as “bloat,” a phenomenon of PostgreSQL and other MVCC databases which causes increased space usage and decreased performance. We’ll see how autovacuum, a tool to combat bloat, is typically misunderstood and misconfigured. By ... Read More