# Parallelism with Android SQLite

DevFeed: [Parallelism with Android SQLite](<https://devfeed.tech/articles/parallelism-with-android-sqlite-25628.md>)

Original publisher: [Read original article](<https://blog.p-y.wtf/parallelism-with-android-sqlite>)

Author: Pierre-Yves Ricau

Published: 2025-02-05T05:35:36Z

Content type: tutorial

Language: en

Sources: [Py's blog](<https://devfeed.tech/sources/py-s-blog.md>)

Topics: [SQLite](<https://devfeed.tech/topics/sqlite.md>), [Android](<https://devfeed.tech/topics/android.md>), [Concurrency](<https://devfeed.tech/topics/concurrency.md>), [Coroutines](<https://devfeed.tech/topics/coroutines.md>), [IO](<https://devfeed.tech/topics/io.md>)

Tags: [android](<https://devfeed.tech/tags/android.md>), [blocking](<https://devfeed.tech/tags/blocking.md>), [connection-pool](<https://devfeed.tech/tags/connection-pool.md>), [coroutines](<https://devfeed.tech/tags/coroutines.md>), [io](<https://devfeed.tech/tags/io.md>), [parallelism](<https://devfeed.tech/tags/parallelism.md>), [performance](<https://devfeed.tech/tags/performance.md>), [sqlite](<https://devfeed.tech/tags/sqlite.md>)

## AI overview

This article explains how Android SQLite's default single-connection behavior causes parallel queries on the same database to block one another. It examines how excessive query parallelism can consume coroutine dispatcher threads and delay unrelated I/O tasks, then discusses using separate dispatchers for blocking database work.

## Source excerpt

The SQLDelight documentation provides this example: val players: Flow> = playerQueries.selectAll() .asFlow() .mapToList(Dispatchers.IO) This looks reasonable, right? In the Square Point Of Sale application, we recently ...