In addition, the row format of value compression has a two-byte overhead per row.

此外，值压缩的行格式会为每一行占用两个字节。

youdao

Each object allocated on the GC heap has an 8-byte overhead (sync block + method table pointer).

每个在GC堆中分配的对象有一个8字节的头(同步块+方法表指针)。

youdao

The error is caused by the fact that there is an overhead of two bytes for varying length and a one-byte overhead for null.

造成这个错误的原因是，变化的长度占用 2 字节，null 占用 1 字节。

youdao