| 类型: | integer |
| 默认: | 10 |
| 最低限度: | 0 |
| 最大: | 10000 |
| 上下文: | user |
| 重新开始: | false |
清理一个必须从磁盘上读取的缓冲区的代价。它表示锁住缓冲池、查找共享哈希表、从磁盘读取需要的块以及扫描其内容的代价。默认值为10。
在 StackOverflow
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