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Oracle数据库空间

[英]Oracle database space

The sum of sm$ts_free.bytes and sm$ts_used.bytes is not equal to sm$ts_alloc.bytes . sm$ts_free.bytessm$ts_used.bytes的总和不等于sm$ts_alloc.bytes

What can be the reason behind it? 它背后的原因是什么?

There is a discussion about these views in the OTN forum. 在OTN论坛中讨论了这些观点 It seems the difference between sm$ts_free.bytes + sm$ts_used.bytes and sm$ts_alloc.bytes is a constant overhead. 似乎sm$ts_free.bytes + sm$ts_used.bytessm$ts_alloc.bytes之间的差异是一个恒定的开销。 It is probably used to store tablespace header information. 它可能用于存储表空间头信息。

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