Title: frequent Database connection errors
Last modified: February 22, 2018

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# frequent Database connection errors

 *  Resolved [Lazymaze20](https://wordpress.org/support/users/lazymaze20/)
 * (@lazymaze20)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/frequent-database-connection-errors/)
 * Hi,
 * since a Database Migration I have frequent Database connection issues and three
   different error messages apperaring on screen.
    My hoster gave me the information
   that the Plugin is creating a lot of Database roundtrips and thus fills up the
   SQL server cache resulting in the connection issues.
 * In order to pevent this I switched the Plugin off. I would like to clean the 
   database from any residues in order to setup the test configuration new.
 * Which are actually the DB Tables to clean? I identified the following:
 *  wp_t_computed_variables
    wp_t_fields wp_t_field_values wp_t_formulas wp_t_passings
   wp_t_passing_answers wp_t_questions wp_t_schema_migrations wp_t_scores wp_t_sections
 * Thank you. Best regards
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ffrequent-database-connection-errors%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Contributor [ustimenko](https://wordpress.org/support/users/ustimenko/)
 * (@ustimenko)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/frequent-database-connection-errors/#post-10004005)
 * You can just deactivate and delete plugin thourhg Plugins page. It should clean
   up after itself.
 * But actually these tables with wp_t_ prefix are plugin’s tables.
 * Regarding connection issues. You can try to research is your hoster supports 
   persistent connections. May be this is one possible reason.
 * > Plugin is creating a lot of Database roundtrips and thus fills up the SQL server
   > cache resulting in the connection issues.
 * You can just use some WP cache plugins to avoid DB requests when it’s not needed.
 * For example when you create /test/blabla/, you actually should cache it for all
   GET requests. Same is for any /test/blabla/dsa6sda6d6asd6as78d6/ like results
   pages.
 * WP cache or nginx cache should cache all GET requests — it’s ok.

Viewing 1 replies (of 1 total)

The topic ‘frequent Database connection errors’ is closed to new replies.

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## Tags

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 * 1 reply
 * 2 participants
 * Last reply from: [ustimenko](https://wordpress.org/support/users/ustimenko/)
 * Last activity: [8 years, 3 months ago](https://wordpress.org/support/topic/frequent-database-connection-errors/#post-10004005)
 * Status: resolved