dc_tablespaces
Probably the most likely cause is the allocation of new extents. If extent sizes are set low then the application may constantly be requesting new extents and causing contention. Do you have objects with small extent sizes that are rapidly growing? (You may be able to spot these by looking for objects with large numbers of extents). Check the trace for insert/update activity, check the objects inserted into for number of extents.
遇到过这样表空间自动扩展这样的一个案例,建议改为手动扩展,并且表空间在规划时建立为assm模式,采用uniform size 统一大小的模式。
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