see on GitHub

    Include Query Timings

    • When making a query,
      you can request to get detailed stats of the time spent by RavenDB on each part of the query.
      E.g. duration of search, loading documents, transforming results, total duration, etc.

    • By default, the timings stats are Not included in the query results, to avoid the measuring overhead.

    • To include the query timings in the query results:
      add a call to the timings() method in your query code, or add include timings() to an RQL query.
      See examples below.

    • In this page:

    Include timings in a query 

    timings: Optional[QueryTimings] = None

# Prepare a callback
def timings_callback(timings_from_server: QueryTimings):
    timings = timings_from_server

results = list(
    session.advanced.document_query(object_type=Product)
    # Call timings, provide a callback function that will be called with result timings
    .timings(timings_callback)
    # Define query criteria
    # i.e. search for docs containing Syrup -or- Lager in their Name field
    .search("Name", "Syrup Lager")
    # Execute the query
)

# Get total query duration:
# =========================
total_query_duration = timings.duration_in_ms

# Get specific parts duration:
# ============================
timings_dictionary = timings.timings
optimizer_duration = timings_dictionary["Optimizer"].duration_in_ms
lucene_duration = timings_dictionary["Query"].timings["lucene"].duration_in_ms
    from "Products"
where search(Name, "Syrup") or search(Name, "Lager")
include timings()

    View timings

    • The detailed timings can be viewed from the Query view in the Studio.

    • Running an RQL query with include timings() will show an additional Timings Tab
      with a graphical representation of the time spent in each query part.

    Figure 1. Include timings graphical results

    Include timings results

    Syntax 

    def timings(self, timings_callback: Callable[[QueryTimings], None]) -> DocumentQuery[_T]: ...
    Parameter Type Description
    timings_callback Callable[[QueryTimings], None] A callback function (action) that takes QueryTimings as an argument. It will be called by the client with the resulting QueryTimings. You can interact with the resulting QueryTimings inside your callback. 

    class QueryTimings:
    def __init__(self, duration_in_ms: int = None, timings: Dict[str, QueryTimings] = None):
        self.duration_in_ms = duration_in_ms
        self.timings = timings or {}
    QueryTimings
    duration_in_ms int Total duration
    timings Dict[str, QueryTimings] Dictionary with QueryTimings info per time part

    Timings in a sharded database

    see on GitHub
    Home / Docs / Client Api / Session / Querying / Debugging / Query Timings