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- Vector Similarity Search Extension 12241
- The vss extension is an experimental extension for DuckDB that adds indexing support to accelerate vector similarity search queries using DuckDB's new fixed-size ARRAY type. See the announcement blog post and the “What's New in the Vector S
...c); The index will then be used to accelerate queries that use an ORDER BY clause evaluating one of the supported distance metric functions against the indexed columns and a constant vector, followed by a LIMIT clause. For example: SELECT * FROM my_vec...the overloaded min_by(col, arg, n) can also be accelerated with the HNSW index if the arg argument is a matching distance metric function. This can be used to do quick one-shot nearest neighbor searches. For example, to get the top 3 rows with the clo...───────────────────────────┘ By default the HNSW index will be created using the euclidean distance l2sq (L2-norm squared) metric, matching DuckDBs array_distance function, but other distance metrics can be used by specifying the metric option during i... - https://man.mtool.work/duckdb/2.0/core_extensions/vss.html
- Profiling 10713
- Profiling is essential to help understand why certain queries exhibit specific performance characteristics. DuckDB contains several built-in features to enable query profiling, which this page covers. For a high-level example of using EXPLA
...ofiling output file Console A filepath profiling_mode Deprecated, has no effect standard standard , detailed , all tracked_metrics Select which metrics to collect ['*'] (all metrics) A list of metric glob patterns, e.g. ['query.*', 'optimizer.*'] . ( L...ist of all available metrics ) disable_profiling , disable_profile Turn off profiling Table Functions These table functions were introduced in DuckDB...specified options. CALL enable_profiling( format := 'json', save_location := '/path/to/output.json', coverage := 'select', metrics := ['query.sql', 'query.total_time', 'operator.timing'] ); Parameter Type Description metrics LIST , STRUCT , or JSON Spe... - https://man.mtool.work/duckdb/2.0/dev/profiling.html
- Pragmas 10191
- The PRAGMA statement is a SQL extension adopted by DuckDB from SQLite. PRAGMA statements can be issued in a similar manner to regular SQL statements. PRAGMA commands may alter the internal state of the database engine, and can influence the
...to the configured output, except no_output . The default format is query_tree . It prints the physical query plan and the metrics of each operator in the tree. SET enable_profiling = 'query_tree'; Alternatively, json returns the physical query plan as...Systems Research Group at the University of Tübingen . To return the physical query plan, including optimizer and planner metrics: SET enable_profiling = 'query_tree_optimizer'; Database drivers and other applications can also access profiling informa...ct: detailed profiling information is always collected. To enable profiling, use PRAGMA enable_profiling . To select which metrics are collected, use the tracked_metrics setting . Custom Metrics New The tracked_metrics setting was introduced in DuckDB... - https://man.mtool.work/duckdb/2.0/configuration/pragmas.html
- Profile and Monitor 9436
- Overview The Go client can observe query execution: it can retrieve per-operator profiling metrics after a query runs, and register a log storage that receives DuckDB's log messages. Both are described below. Profiling Profiling information
...query to profile. res, err := conn.QueryContext(context.Background(), `SELECT 42`) check(err) res.Close() // Retrieve the metrics collected for that query. info, err := duckdb.GetProfilingInfo(conn) check(err) // Optionally, turn profiling off again....`) check(err) GetProfilingInfo() returns a duckdb.ProfilingInfo , a tree that mirrors DuckDB's query plan. Each node has a Metrics map of metric name to value and a Children slice of child nodes. Metrics are grouped and named in lowercase: the root's c...hildren are the root plan operator, whose metrics include type and timing , followed by one node per metric group, e.g., the query group with total_time . Walk the tree to... - https://man.mtool.work/duckdb/2.0/clients/go/profiling.html
- Metrics 9041
- DuckDB provides a set of metrics that can be used to monitor the performance and health of the database. Metrics are named ⟨group⟩.⟨metric⟩ , e.g., query.total_time or operator.timing . The set of collected metrics is controlled with the tr
...acked_metrics setting , which takes a list of glob patterns, e.g., ['query.*', 'operator.timing'] . By default, all metrics are collect...ed ( ['*'] ). The available metrics, along with their types and units, can be listed with the duckdb_available_metrics() table function: SELECT metric_name,...metric_type, unit FROM duckdb_available_metrics(); All Metrics The metrics are organized into the following groups: query system io storage operator optimizer parser pla... - https://man.mtool.work/duckdb/2.0/dev/metrics.html
- DuckDB_% Metadata Functions 8538
- DuckDB offers a collection of table functions that provide metadata about the current database. These functions reside in the main schema and their names are prefixed with duckdb_ . The resultset returned by a duckdb_ table function may be
...views(); The duckdb_views view returns views that are not marked as internal: SELECT * FROM duckdb_views; duckdb_available_metrics New The duckdb_available_metrics() function was introduced in DuckDB 2.0. The duckdb_available_metrics() function lists t...he metrics that can be collected by the profiler , e.g., using the tracked_metrics setting. Column Description Type metric_name The...name of the metric, e.g., query.cpu_time . VARCHAR metric_type The type of the metric's value, e.g., double , uint64 , string or map . VARCHA... - https://man.mtool.work/duckdb/2.0/sql/meta/duckdb_table_functions.html
- Profile and Monitor 7387
- Overview The Rust client can observe a running or completed query: it can retrieve per-operator profiling metrics after a query runs, and interrupt a long-running query from another thread. Both are shown below. Profiling Profiling must be
...enabled on a connection before metrics are collected. Enable it with the enable_profiling PRAGMA , run a query, then read the result with get_profiling_info() :...iling_info() returns an Option<ProfilingInfo> , which is None when profiling is not enabled. ProfilingInfo is a tree whose metrics are grouped and named in lowercase (see the metrics list ): the root's children are the root plan operator, with metrics...such as type , timing and intermediate_rows , followed by one node per metric group, such as query with total_time . Read a node's metrics through its metrics map and its children through children . I... - https://man.mtool.work/duckdb/2.0/clients/rust/profiling.html
- Logging 6758
- DuckDB implements a logging mechanism that provides users with detailed information about events such as query execution, performance metrics and system events. Warning Logs may contain sensitive information, including secrets and credentia
...om DuckDB's internal HTTP client Yes PhysicalOperator Logs events emitted by physical operators during query execution Yes Metrics Logs profiling metrics collected during query execution Yes The structured log types expose the following schemas, which...ator operator_type VARCHAR , parameters MAP(VARCHAR, VARCHAR) , class VARCHAR , event VARCHAR , info MAP(VARCHAR, VARCHAR) Metrics metric VARCHAR , value VARCHAR Log Storages By default, DuckDB logs to an in-memory log storage ( memory ), except in the... - https://man.mtool.work/duckdb/2.0/operations_manual/logging/overview.html
- Configuration 6506
- DuckDB has a number of configuration options that can be used to change the behavior of the system. The configuration options can be set using either the SET statement or the PRAGMA statement . They can be reset to their original values usi
...value. VARCHAR main search_path Sets the default catalog search path as a comma-separated list of values. VARCHAR tracked_metrics A list of metric glob patterns to enable for collection, e.g., ['query. ', 'optimizer. ']. VARCHAR[] [*] Deprecated Confi...tting. Configures the use of the deprecated single arrow operator (->) for lambda functions. VARCHAR DEFAULT GLOBAL legacy_metrics_format Deprecated setting. When enabled, profiling output uses the legacy flat format instead of the current grouped form... - https://man.mtool.work/duckdb/2.0/configuration/overview.html
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