The Rewriter query rewrite plugin supports the following status variables. These variables are available only if the plugin is installed (see Section 5.6.4.1, “Installing or Uninstalling the Rewriter Query Rewrite Plugin”).
The number of rewrite plugin rewrite rules successfully loaded from the rewrite_rules table into memory for use by the Rewriter plugin.
The number of times the rewrite_rules table has been loaded into the in-memory cache used by the Rewriter plugin.
Rewriter_number_rewritten_queries
The number of queries rewritten by the Rewriter query rewrite plugin since it was loaded.
Whether an error occurred the most recent time that the rewrite_rules table was loaded into the in-memory cache used by the Rewriter plugin. If the value is OFF, no error occurred. If the value is ON, an error occurred; check the message column of the rewriter_rules table for error messages.