小编Gui*_*nto的帖子

是否可以在正在运行的查询中获取已用内存？

就像是：

mysql> SELECT MEMORY_PEAK as memory; #return memory usage by mysql before run query
mysql> SELECT id FROM table WHERE id>2; #run query
mysql> SELECT MEMORY_PEAK as memory; #return memory usage by mysql after run query

并返回类似（返回 17kb）的内容：

+----------+
|  memory  |
+----------+
|  20100   |
+----------+

+------+
|  id  |
+------+
|  3   |
+------+

+----------+
|  memory  |
+----------+
|  2026767 |
+----------+

或者

mysql> USAGE SELECT id FROM table WHERE id>2;

并返回类似（返回 17kb）的内容：

+---------+
|  USAGE …