Currently running workflow instances, including instance states and variables.
当前运行的工作流实例，包括实例的状态和变量。
A config-default.xml file is optional and typically contains workflow parameters common to all workflow instances.
config - default . xml文件是可选的，通常其中会包含对于所有工作流实例通用的工作流参数。
This will force the runtime tracking infrastructure to load tracking profiles from its registered tracking services for any workflow instances that are loaded into memory after the cache is cleared.
这将强制运行时跟踪基础结构在清除了缓存后，为加载到内存中的任何工作流实例，从其注册的跟踪服务中加载跟踪配置文件。
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