The Query Stats plugin tracks database queries.

Use the “queries” helper or controller method to access data on the queries. See the documentation on QueryStats::Holder for functionality.

You can easily display statistics in your page footer, such as:

Queries in Controller: <%= queries.count_with_label :controller %>
Queries in View:       <%= queries.count_with_label :view %>
Query Time:            <%= queries.runtime %>

QueryStats adds the number of queries to the log in the DB section:

Completed in 0.00642 (155 reqs/sec) | Rendering: 0.00228 (35%) | DB: 0.00247 (38%) 6 queries | 200 OK [http://test.host/]

• X-QueryCount will be set to the number of queries

• X-QueryRuntime will be set to the db runtime

Tests pass with:

• Rails: 1.2.6, 2.0.2, 2.1.0

• Adapters: sqlite3, mysql

• Dan Manges

• Guillaume Dufloux

Released under the MIT license.