diff options
Diffstat (limited to 'searchlib/src/vespa/searchlib/queryeval/blueprint.h')
| -rw-r--r-- | searchlib/src/vespa/searchlib/queryeval/blueprint.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/searchlib/src/vespa/searchlib/queryeval/blueprint.h b/searchlib/src/vespa/searchlib/queryeval/blueprint.h index a443f34f856..a493c725407 100644 --- a/searchlib/src/vespa/searchlib/queryeval/blueprint.h +++ b/searchlib/src/vespa/searchlib/queryeval/blueprint.h @@ -313,6 +313,20 @@ public: // optimal ordering. Used for testing. void null_plan(InFlow in_flow, uint32_t docid_limit); + // Estimate the actual cost of evaluating the (sub-)query + // represented by this blueprint with the given in-flow. This + // function should be called after query planning has been + // performed. This function could be useful to predict very + // expensive queries, but the initial use-case is to understand + // query cost better in micro-benchmarks to improve low-level cost + // tuning. + virtual double estimate_actual_cost(InFlow in_flow) const noexcept; + // Estimate the change in cost caused by having a strict iterator + // with a non-strict in-flow. Note that this function might force + // the in_flow to be strict in order to align it with the + // strictness of this blueprint. + double estimate_strict_cost_diff(InFlow &in_flow) const noexcept; + static Blueprint::UP optimize(Blueprint::UP bp); virtual void sort(InFlow in_flow) = 0; static Blueprint::UP optimize_and_sort(Blueprint::UP bp, InFlow in_flow, const Options &opts) { @@ -482,6 +496,9 @@ public: void setDocIdLimit(uint32_t limit) noexcept final; void each_node_post_order(const std::function<void(Blueprint&)> &f) override; + // additional cost not attributed to the children flow (heap merge/unpack/etc) + virtual double estimate_self_cost(InFlow in_flow) const noexcept; + double estimate_actual_cost(InFlow in_flow) const noexcept override; void optimize(Blueprint* &self, OptimizePass pass) final; void sort(InFlow in_flow) override; void set_global_filter(const GlobalFilter &global_filter, double estimated_hit_ratio) override; |