忙等待 meaning in English

busy waiting

This is the reason why reversing the index when its leading column is fed by a sequence reduces buffer contention , removes the hot block problem and by doing so , reduces the potential for buffer busy waits on a multi - user system
这正是为何当前导（ /起始）列由序列生成时索引的逆序处理可以降低缓存争用，解决热块问题，并且这样做可以在一个多用户系统中减少缓存忙等待的机会。