Removal and insertion of rows in table

Hello

Rows of the table in my database are often inserted and deleted. It is inserting and deleting causes high water? Please suggest me a solution?

Thanks in advance,
Goussard

Take a step back, you have some reason to believe that you have a problem with wasted space?

Unless you perform direct-path inserts (which requres more work and usually occurs only in data warehouse environments where you do batch data loads), insert operations reuse fortunately space in blocks that was released by prior deletions. The exact mechanism of how and when Oracle decides which block to insert a new line will depend on the tablespace configuration and the configuration of the object, but the basic principle is the same no matter what. Do a lot of insertions and deletions on a table does not generally that there is a lot of space lost in the table, so there is usually nothing you need to do. The exception is if you make a single removal which decreases permanently the size of the table (i.e. the 1 GB of data stored table, make you a single 500 MB deletion, and every day you insert and remove the 10 MB of data, causing ever the table having more than 510 MB of data, leaving 490 MB of unused space) , but it seems that the volume of data you enter is essentially at the same level as the volume of data you delete.

As I see no evidence that you have a problem with wasted space, my suspicion is that you are worried needlessly. If you don't have any evidence that space is wasted, however, please give us more information about the symptoms.

Justin

Tags: Database

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