If you are using the Broken Link Checker plugin on your site, it may cause resource and CPU issues on the hosting server. The blc_installation_log option could get as large as 1MB with 50kb of autoloading data if you have many posts on the site. The options values that the Broken Link Checker plugin uses are; wsblc_options blc_activation_enabled blc_installation_log The Broken Link Checker plugin uses the following database tables to store the data; wp_blc_filters wp_blc_instances wp_blc_links wp_blc_synch The database tables should be removed when you deactivate and uninstall the plugin. However, if they still exist, you can use a plugin