StoreInfo

What a store holds, as of the moment ReadableJsonStore.info was called; read from memory, without a scan.

• approximateDocumentCount: documents a search can find now. An upper bound: an insert rejected before it wrote anything leaves a docId that is counted but names no document, so the count is exact in a store that never rejected a document that way. Inserts still running aren't counted, except, in a secondary, small ones its writer hadn't logged yet.

• deletedDocumentCount: documents deleted over the store's life.

• secondary: whether the counts are those of a SecondaryJsonStore, as of its last refresh.