由于软件栈是一个松散的组件集，而非一个整体堆栈，性能调优是一大挑战，因为需要分析和调优每个组件。
Because the software stack is a loose set of components rather than a monolithic stack, tuning for performance can be a challenge since each component needs to be analyzed and tuned.
它包括分析和调优系统硬件及软件，以优化所有主要组件的性能，包括内存、CPU、磁盘驱动器和网络。
It includes analyzing and tuning your system hardware and software for optimal performance of all major components including memory, CPUs, disk drives, and the network. For example.
工具包使你可以通过事务跟踪、根本原因分析和监测资源情况来鉴别应用软件的性能问题。
The toolkits let you identify application performance problems — right down to the transaction level — via transaction tracking, root cause analysis, and resource monitoring.
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