CompressedDate 

The date the index was compressed.  

CreatedDate 

When index was created  

DocCount 

Number of documents in the index.  

Flags 

IndexingFlags used when this index was created.  

Fragmentation 

Measures the extent to which an index is fragmented by being built in multiple indexing jobs.  

IndexSize 

Size of the index, in bytes  

LastDocId 

Last document id assigned in this index  

ObsoleteCount 

ObsoleteCount is the number of documents for which obsolete information is stored in the index.  

PercentFull 

Indicates how much of the maximum capacity of the index has been used (This is a percentage of the maximum index capacity and does not consider the amount of disk space actually available.  

StartingDocId 

First document id assigned, or to be assigned, in this index (will be 1 for an empty index)  

StructureVersion 

dtSearch index format version, expressed as minorVersion + majorVersion * 100. 701, for example, means 7.01  

UpdatedDate 

When index was last updated  

WordCount 

Number of unique words in the index.