Database file growth rate varies extremely

[kspangsege]

When adding small lumps of data through many individual write transactions, the rate of growth of the database file is sometimes extremely high, and sometimes it is not.

With about 4000 transactions each one adding a single row to a simple two-column table, the database file generally grows to about 2GiB, which seems pretty excessive.

In some cases though, this does not happen, and the database file size remains at a few hundred KiB, and that is for the exact same sequence of transactions.

To me, this looks like an indication of a bug.

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