Which two options describe how MySQL Server allocates memory?

A. Each connection may have its own per-thread memory allocations.

B. Thread memory is pre-allocated up to thread_cache_size for performance.

C. Each thread allocates memory from a global pool.

D. Global memory resources are allocated at server startup.

Answer: A,D

A.正确,每个连接有自己的的内存
B.thread_cache_size 不是预先分配而是延迟销毁
C.每个进程不是公共内存而是独立内存
D.公共内存资源在服务器启动时分配
正确的是 A D