如何判断DOL表需要reorg？
如何判断DOL表需要reorg？有没有什么不影响业务的重建方法？
一般都怎么去reorg 呢？ 判断表是否需要执行reorg操作，可以先用datachange函数来判断表上的更新频率。
对于DOL可以用with resume 和 time参数。 对于APL表的话，找个空闲时间吧，或者重建索引也行。
对apl表执行regorg rebuild操作的时候会加锁影响业务使用。 When you run reorg rebuild on a table, it locks the table for the entire time it takes to rebuild the table and its indexes. This means that you should schedule the reorg rebuild command on a table when users do not need access to the table.
All of the other reorg commands, including reorg rebuild on an index, lock a small number of pages at a time, and use short, independent transactions to perform their work. You can run these commands at any time. The only negative effects might be on systems that are very I/O bound.
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