6、扫描时间(Sweep Time):表示在一定的SPAN带宽内,扫描一次所用的时间。 7、灵敏度:一般把信号带宽为XHZ的最小接收电平定义为频谱仪的在该带宽的接收灵...
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扫描时间应该比标记时间短得多。
The sweep time should be significantly shorter than the mark times.
一个表中有太多列比仅有一些列时进行查询所需的扫描时间要长。
Too many columns in a table can make the scan time for queries much longer than if there are just a few columns.
如果扫描时间很长,则应考虑缩小堆的大小或者采用gencon策略。
If the sweep times are very long, consider reducing the size of the heap or switching to the gencon policy.
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