Java Performance And Scalability A Quantitative Approach _top_ Guide

Aria halted the madness. "We stop guessing," she announced. "We measure." She introduced the :

Several factors impact Java scalability, including: Java Performance And Scalability A Quantitative Approach

Due to contention (locks, GC pauses), throughput does not scale linearly. As you increase load, latency eventually approaches infinity (the "elbow" point). Aria halted the madness

Measure the "Scale Factor." If you add 4x the nodes, does throughput increase by 3.9x (good) or 2x (bad lock)? including: Due to contention (locks

In performance testing, the first 10,000 iterations don't count. The JVM starts in interpreted mode, then compiles hot methods to native code via C1 (client) and C2 (server compilers).

Two CPU cores writing to different variables located on the same CPU cache line (64 bytes) must ping-pong ownership.