不过，如果允许太多自由空间的存在，则可能导致查询时需要读取额外的页，这反而大大违反了使用群集索引的本意。

Allowing too much free space, however, could cause extra pages to be read for queries and largely defeat the purpose of using a clustering index.

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为了生成索引页，我们将使用4ss的一些扩展函数，以使XSLT访问rdf模型。

To generate an index page, we will use some extension functions of 4ss for XSLT to access the RDF model.

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如果的确是上述情况，那么使用更大的缓冲池是最好的解决办法，但是为索引页增加更多的自由空间也有所帮助。

If this is the case, a larger buffer pool is the best solution, but adding more free space to index pages may also help.

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