da74323141
This commit refactors the handling of thread pool settings so that the individual settings can be registered rather than registering the top level group. With this refactoring, individual plugins must now register their own settings for custom thread pools that they need, but a dedicated API is provided for this in the thread pool module. This commit also renames the prefix on the thread pool settings from "threadpool" to "thread_pool". This enables a hard break on the settings so that: - some of the settings can be given more sensible names (e.g., the max number of threads in a scaling thread pool is now named "max" instead of "size") - change the soft limit on the number of threads in the bulk and indexing thread pools to a hard limit - the settings names for custom plugins for thread pools can be prefixed (e.g., "xpack.watcher.thread_pool.size") - remove dynamic thread pool settings Relates #18674 |
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