message: Reduce SW_IPC_BUFFER_MAX_SIZE to 64k
diff: #else
  #define SW_IPC_MAX_SIZE 8192 // for IPC, dgram and message-queue max size
  #endif
  -#define SW_IPC_BUFFER_MAX_SIZE (256 * 1024)
  +#define SW_IPC_BUFFER_MAX_SIZE (64 * 1024)
  #define SW_IPC_BUFFER_SIZE (SW_IPC_MAX_SIZE - sizeof(swoole::DataHead))
  // !!!End.-------------------------------------------------------------------
  