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sqlite-utils analyze command, refs #379

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Simon Willison 2022-01-10 17:24:17 -08:00
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docs/cli.rst
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@ -1800,6 +1800,23 @@ If the ``_counts`` table ever becomes out-of-sync with the actual table counts y
$ sqlite-utils reset-counts mydb.db
.. _cli_analyze:
Optimizing index usage with ANALYZE
===================================
The `SQLite ANALYZE command <https://www.sqlite.org/lang_analyze.html>`__ builds a table of statistics which the query planner can use to make better decisions about which indexes to use for a given query.
You should run ``ANALYZE`` if your database is large and you do not think your indexes are being efficiently used.
To run ``ANALYZE`` against every index in a database, use this::
$ sqlite-utils analyze mydb.db
You can run it against specific tables, or against specific named indexes, by passing them as optional arguments::
$ sqlite-utils analyze mydb.db mytable idx_mytable_name
.. _cli_vacuum:
Vacuum