thread_pool_big_threads线程池中正在执行复杂查询的线程数。复杂查询包括有子查询、聚合函数、group by、limit等的查询语句。 thread_pool_dml_threads线程池中的在执行DML的线程数。 thread_pool_idle_threads线程池中的空闲线程数。 thread_pool_qry_threads线程池中正在执行简单查询的线程数。
6 static unsigned int idle_threads;//当前空闲的线程数 7 static unsigned int nthreads; 8 static uv_thread_t* threads; 9 static uv_thread_t default_threads[4]; 10 static QUEUE exit_message; 11 static QUEUE wq;//线程池全部会检查这个queue,一旦发现有任务就执行,但是只能有一个线程抢占到 12 s...
threads:返回的热点线程数,默认为3。 interval:ES对线程做两次检查,来计算某个操作.上花费时间的百分比,此参数定义这个间隔时间。默认为500 ms。 type:定义要检查的线程状态类型,默认为CPU.API可以检查线程的CPU占用时间、阻塞(block)时间和等待(wait) 时间。 ignore_idle_threads:如果设置为true, 则空闲线程(例如...
phread创建线程有点麻烦 letidleThreads=threadCount-activeThreadCountiftasksQueue.count>idleThreads&&threadCount<threadCountLimit{letholder=Unmanaged.passRetained(self)letpointer=UnsafeMutableRawPointer(holder.toOpaque())varthread:pthread_t?=nilvaruser_interactive_qos_attr=pthread_attr_t()pthread_attr_init(...
* thread will be created and added to the pool. Threads that have * not been used for sixty seconds are terminated and removed from * the cache. Thus, a pool that remains idle for long enough will * not consume any resources. Note that pools with similar ...
这个idle Thread就是上面提到的超过 corePoolSize 后新创建的那些线程,默认情况下,只有当线程池中的线程数大于corePoolSize,且这些"idle Thread"并没有被分配任务时,这个参数才会起作用。 另外,如果调用了 ThreadPoolExecutor#allowCoreThreadTimeOut(boolean) 的方法,在线程池中的线程数不大于corePoolSize,且这些core...
* make DEFAULT_THREAD_NUM threads * @param timeout if timeout and runningThreadNum_ < DEFAULT_THREAD_NUM, the running thread should be terminated */ explicitThreadPool(uint32_ttimeout) :timeout_(timeout),idleThreadNum_(0),needRun_(true) ...
类型为FQueuedLowLevelThreadPool,数量由FPlatformMisc::NumberOfCoresIncludingHyperthreads()确定。 使用线程池 虽然线程池实现比Runnable复杂,但使用方式也比较简单。 1 Async函数 最常见用法,Async函数可设置EAsyncExecution::ThreadPool参数,指定任务在ThreadPool里执行。
* @param maximumPoolSize the maximum number of threads to allow in the * pool * @param keepAliveTime when the number of threads is greater than * the core, this is the maximum time that excess idle threads * will wait for new tasks before terminating. ...
workerThreads Type: System.Int32% The minimum number of idle worker threads currently maintained by the thread pool. completionPortThreads Type: System.Int32% The minimum number of idle asynchronous I/O threads currently maintained by the thread pool. Remarks Idle threads are maintained by the...