dispatch = 'feedwordpress_performance'; $this->filename = __FILE__; } function has_link () { return false; } function display () { global $wpdb, $wp_db_version, $fwp_path; global $fwp_post; if (FeedWordPress::needs_upgrade()) : fwp_upgrade_page(); return; endif; // If this is a POST, validate source and user credentials FeedWordPressCompatibility::validate_http_request(/*action=*/ 'feedwordpress_performance', /*capability=*/ 'manage_options'); if (strtoupper($_SERVER['REQUEST_METHOD'])=='POST') : $this->accept_POST($fwp_post); do_action('feedwordpress_admin_page_performance_save', $fwp_post, $this); endif; //////////////////////////////////////////////// // Prepare settings page /////////////////////// //////////////////////////////////////////////// $this->display_update_notice_if_updated('Performance'); $this->open_sheet('FeedWordPress Performance'); ?>
__('Performance'), ); foreach ($boxes_by_methods as $method => $title) : add_meta_box( /*id=*/ 'feedwordpress_'.$method, /*title=*/ $title, /*callback=*/ array('FeedWordPressPerformancePage', $method), /*page=*/ $this->meta_box_context(), /*context=*/ $this->meta_box_context() ); endforeach; do_action('feedwordpress_admin_page_performance_meta_boxes', $this); ?>
meta_box_context(), $this->meta_box_context(), $this); ?>
close_sheet(); } /* FeedWordPressPerformancePage::display () */ function accept_POST ($post) { if (isset($post['create_index'])) : FeedWordPress::create_guid_index(); $this->updated = __('guid column index created on database table.'); endif; if (isset($post['remove_index'])) : FeedWordPress::remove_guid_index(); $this->updated = __('guid column index removed from database table.'); endif; if (isset($post['clear_cache'])) : $N = FeedWordPress::clear_cache(); $feeds = (($N == 1) ? __("feed") : __("feeds")); $this->updated = sprintf(__("Cleared %d cached %s from WordPress database."), $N, $feeds); endif; if (isset($post['optimize_in'])) : update_option('feedwordpress_optimize_in_clauses', true); $this->updated = sprintf(__("Enabled optimizing inefficient IN clauses in SQL queries.")); elseif (isset($post['optimize_out'])) : update_option('feedwordpress_optimize_in_clauses', false); $this->updated = sprintf(__("Disabled optimizing inefficient IN clauses in SQL queries.")); endif; } /* FeedWordPressPerformancePage::accept_POST () */ /*static*/ function performance_box ($page, $box = NULL) { $optimize_in = get_option('feedwordpress_optimize_in_clauses', false); // Hey ho, let's go... ?>
Feed cache:

This will clear all cached copies of feed data from the WordPress database and force FeedWordPress to make a fresh scan for updates on syndicated feeds.

Guid index:

Creating this index may significantly improve performance on some large FeedWordPress installations.

You have already created an index on the guid column in the WordPress posts table. If you'd like to remove the index for any reason, you can do so here.

Optimize IN clauses:

Advanced setting. As of releases up to 3.3.2, WordPress still generates many SQL queries with an extremely inefficient use of the IN operator (for example, SELECT user_id, meta_key, meta_value FROM wp_usermeta WHERE user_id IN (1)). When there is only one item in the set, the IN operator is unnecessary; and inefficient, because it prevents SQL from making use of indexes on the table being queried. Activating this setting will cause these queries to get rewritten to use a simple equality operator when there is only one item in the set (for example, the example query above would be rewritten as SELECT user_id, meta_key, meta_value FROM wp_usermeta WHERE user_id = 1).

Note. This is an advanced setting, which affects WordPress's database queries at a very low level. The change should be harmless, but proceed with caution, and only if you are confident in your ability to restore your WordPress installation from backups if something important should stop working.

You can use this setting to disable any attempts by FeedWordPress to optimize or rewrite WordPress's SQL queries.
display();