This option causes on-disk database contents to not be immediately synchronized with in memory changes upon change. Enabling this option may improve performance at the expense of data integrity.

• 本选项使得当发生改变时，磁碟上的资料库内容不会立即和内存中的内容进行同步。允许该选项可以在牺牲数据安全性的情况下提高性能。