Non-indexed searches on objectclass?

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Philip Kime wrote:
> When I look at the logconv output for some of my FDS servers, I see 
> that the common factor on all listed unindexed searches is using the 
> "objectclass" attribute. Is it worth indexing this?
>
It is already indexed for equality. The fact that an attribute is 
indexed does not mean all searches using it will be indexed searches. In 
an attempt to perform _less_ work, when the number of candidate entries 
returned by an index exceeds administrative limits it triggers an 
unindexed search. Also the type of index must match the search filter 
type. As db of size increases, objectclass becomes less and less likely 
to actually distinguish entries sufficiently to be useful, and certainly 
not with any index type other than equality.

-- 
Pete

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