Question

Once done storing all of my data into sqlite, it reach 14 MB already. That’s why I’m afraid that some people cannot download my application from connection slow area. Is there any way to shrink sqlite database?

Answer 1

Have you tried VACUUM?

The VACUUM command rebuilds the entire database. There are several reasons an application might do this:

• Unless SQLite is running in “auto_vacuum=FULL” mode, when a large amount of data is deleted from the database file it leaves behind empty space, or “free” database pages. This means the database file might be larger than strictly necessary. Running VACUUM to rebuild the database reclaims this space and reduces the size of the database file.
• Frequent inserts, updates, and deletes can cause the database file to become fragmented – where data for a single table or index is scattered around the database file. Running VACUUM ensures that each table and index is largely stored contiguously within the database file. In some cases, VACUUM may also reduce the number of partially filled pages in the database, reducing the size of the database file further…

The VACUUM command works by copying the contents of the database into a temporary database file and then overwriting the original with the contents of the temporary file. When overwriting the original, a rollback journal or write-ahead log WAL file is used just as it would be for any other database transaction. This means that when VACUUMing a database, as much as twice the size of the original database file is required in free disk space…