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- Multiple Connections 12334
- For tests whose purpose is to verify that the transactional management or versioning of data works correctly, it is generally necessary to use multiple connections. For example, if we want to verify that the creation of tables is correctly
...s, but all the queries will still be run sequentially on a single thread. If we want to run code from multiple connections concurrently over multiple threads, we can use the concurrentloop construct. The queries in concurrentloop will be run concurrently on... - https://man.mtool.work/duckdb/2.0/dev/sqllogictest/multiple_connections.html
- Tuning Workloads 8913
- DuckDB aims to perform well out of the box, so most workloads do not require any tuning. When tuning is worthwhile, there is no single configuration or magic number that is optimal for every workload: the right settings depend on what you a
...h different sets of parameters. Note that it is not a primary design goal for DuckDB to quickly execute many small queries concurrently. Rather, it is optimized for running larger, less frequent queries. Querying Remote Files Starting with version 2.0, DuckD...ividual query, but it is not possible to parallelize in all cases. Making multiple connections can process more operations concurrently. This can be more helpful if DuckDB is not CPU limited, but instead bottlenecked by another resource like network transfer... - https://man.mtool.work/duckdb/2.0/guides/performance/how_to_tune_workloads.html
- Julia Client 8118
- The DuckDB Julia package provides a high-performance front-end for DuckDB. Much like SQLite, DuckDB runs in-process within the Julia client, and provides a DBInterface front-end. The package also supports multi-threaded execution. It uses J
...nder) end # close the appender after all rows DuckDB.close(appender) Concurrency Within a Julia process, tasks are able to concurrently read and write to the database, as long as each task maintains its own connection to the database. In the example below, a... - https://man.mtool.work/duckdb/2.0/clients/tertiary_clients/julia.html
- ODBC Extension 7581
- Please note that DuckDB also offers an ODBC client , which allows you to connect to DuckDB via ODBC from other applications. The odbc_scanner extension allows connecting to other databases (using their ODBC drivers ) and run queries with th
...o run parts of the query in parallel. ODBC drivers may or may not support using the same connection from different threads concurrently. To prevent possible concurrency problems the extension does not allow to use the same connection from multiple threads. F... - https://man.mtool.work/duckdb/2.0/core_extensions/odbc/overview.html
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