Any read-only tree operation is thread-safe as long as there isn't any thread modifying it.

所有只读的树操作都是线程安全的，只要没有线程修改它。

youdao

In this example, the memcpy operation is trying to read 20 bytes from PTR, but it has been allocated only 10 bytes.

在本例中，memcpy操作尝试从ptr读取20个字节，但是后者仅被分配了10个字节。

youdao

If you are performing an in-place alter operation or altering a read-only server, replay position advancement is not performed.

如果正在执行一个in - place alter操作，或者正在修改一个只读的服务器，则不会推进重放位置。

youdao