Number of batch get calls for token checks.
Total number of keys checked via batch get calls.
Number of candidates verified for exact matching.
DynamoDB batch get calls issued (if applicable).
DynamoDB item read calls issued (if applicable).
DynamoDB query calls issued (if applicable).
Number of postings pages read.
OptionalprimaryHash of the primary token chosen for paging.
OptionalqueryHash of the normalized query text for correlation.
Epoch timestamp when the search started.
OptionaltokenTotal number of tokens processed for the query.
Runtime counters and metadata collected during a search.