High Water Mark 图示
+---- high water mark of newly created table
|
V
+--------------------------------------------------------+
| | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
high water mark after inserting 10,000 rows
|
v
+--------------------------------------------------------+
|x |x |x |x |x |x |x |x |x |x |x |x | | | | | | | |
|x |x |x |x |x |x |x |x |x |x |x |x | | | | | | | |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
high water mark after inserting 10,000 rows
|
v
+--------------------------------------------------------+
|x |x |x |x |x |x |x | | | | | | | | | | | | |
|x |x |x |x |x |x |x | | | | | | | | | | | | |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+