Hi , i have this 500 error on my wpforo almost everyday at the same time , and i need service provider to clar the caches for me before the site will recover . I check the error log everytime this error appear and its an error on my wpforo , I will attach the error msge here hope you guys can help me with this, Thank you in advance!

Error as below:

• [19-Dec-2018 09:35:29 UTC] WordPress database error Out of resources when opening file '/var/mysqltmp/#sql_bfc8b_5.MYI' (Errcode: 24 - Too many open files) for query SELECT * FROM `wp_wpforo_ads` WHERE `start_date` <= '2018-12-19 09:35:28' AND (`end_date` = '0000-00-00 00:00:00' OR `end_date` >= '2018-12-19 09:35:28') AND `forumids` REGEXP '(,|^)(0)(,|$)' AND `tpllocs` REGEXP '(,|^)(top)(,|$)' AND `status` = 1 ORDER BY RAND() LIMIT 1 made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/plugins/wpforo/wpf-themes/classic/index.php'), include('/plugins/wpforo/wpf-themes/classic/header.php'), do_action('wpforo_top_hook'), WP_Hook->do_action, WP_Hook->apply_filters, wpforo_do_top_ads, wpForoAD->get_ads
• [19-Dec-2018 09:35:29 UTC] PHP Warning: mysqli_query(): (HY000/23): Out of resources when opening file '/var/mysqltmp/#sql_bfc8b_5.MYI' (Errcode: 24 - Too many open files) in /home2/sexbombed/shareforum.online/wp-includes/wp-db.php on line 1924
• [19-Dec-2018 09:35:28 UTC] WordPress database error Can't open file: './sexbombe_wrdp3/wp_term_taxonomy.frm' (errno: 24 - Too many open files) for query SELECT tr.object_id FROM wp_term_relationships AS tr INNER JOIN wp_term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ('nav_menu') AND tt.term_id IN ('44') ORDER BY tr.object_id ASC made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/plugins/wpforo/wpf-themes/classic/index.php'), get_header, locate_template, load_template, require_once('/themes/govideo/header.php'), get_template_part, locate_template, load_template, require('/themes/govideo/template-parts/navigation/navigation-top.php'), wp_nav_menu, wp_get_nav_menu_items, get_objects_in_term
• [19-Dec-2018 09:35:26 UTC] WordPress database error Out of resources when opening file './sexbombe_wrdp3/wp_options.MYD' (Errcode: 24 - Too many open files) for query SELECT option_value FROM wp_options WHERE option_name = 'can_compress_scripts' LIMIT 1 made by require('wp-blog-header.php'), require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), WP_Hook->do_action, WP_Hook->apply_filters, wp_widgets_init, do_action('widgets_init'), WP_Hook->do_action, WP_Hook->apply_filters, WP_Widget_Factory->_register_widgets, WP_Widget->_register, WP_Widget_Text->_register_one, wp_add_inline_script, wp_scripts, WP_Scripts->__construct, WP_Scripts->init, do_action_ref_array, WP_Hook->do_action, WP_Hook->apply_filters, wp_default_packages, wp_register_tinymce_scripts, script_concat_settings, get_site_option, get_network_option, get_option
• [19-Dec-2018 09:35:23 UTC] WordPress database error Can't open file: './sexbombe_wrdp3/wp_terms.frm' (errno: 24 - Too many open files) for query SELECT t.*, tt.* FROM wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN ('category') ORDER BY t.name ASC made by require('wp-blog-header.php'), require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), include('/themes/govideo/functions.php'), require_once('/themes/govideo/inc/customizer-options.php'), govideo_customizer_library_options, get_categories, get_terms, WP_Term_Query->query, WP_Term_Query->get_terms
• [19-Dec-2018 09:35:23 UTC] WordPress database error Out of resources when opening file './sexbombe_wrdp3/wp_term_relationships.MYD' (Errcode: 24 - Too many open files) for query SELECT tr.object_id FROM wp_term_relationships AS tr INNER JOIN wp_term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ('nav_menu') AND tt.term_id IN ('65') ORDER BY tr.object_id ASC made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/plugins/wpforo/wpf-themes/classic/index.php'), include('/plugins/wpforo/wpf-themes/classic/header.php'), wpForoTemplate->nav_menu, wp_nav_menu, wp_get_nav_menu_items, get_objects_in_term
• [17-Dec-2018 10:12:43 UTC] WordPress database error Out of resources when opening file './sexbombe_wrdp3/wp_postmeta.MYD' (Errcode: 24 - Too many open files) for query SELECT post_id, meta_key, meta_value FROM wp_postmeta WHERE post_id IN (1915) ORDER BY meta_id ASC made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/plugins/wpforo/wpf-themes/classic/index.php'), dynamic_sidebar, WP_Widget->display_callback, WP_Widget_Media->widget, WP_Widget_Media_Image->render_media, WP_Widget_Media->is_attachment_with_mime_type, wp_attachment_is, get_attached_file, get_post_meta, get_metadata, update_meta_cache
• [17-Dec-2018 10:12:42 UTC] WordPress database error Can't open file: './sexbombe_wrdp3/wp_postmeta.frm' (errno: 24 - Too many open files) for query SELECT post_id, meta_key, meta_value FROM wp_postmeta WHERE post_id IN (2026) ORDER BY meta_id ASC made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/plugins/wpforo/wpf-themes/classic/index.php'), dynamic_sidebar, WP_Widget->display_callback, WP_Widget_Media->widget, WP_Widget_Media_Image->render_media, WP_Widget_Media->is_attachment_with_mime_type, wp_attachment_is, get_attached_file, get_post_meta, get_metadata, update_meta_cache
• [17-Dec-2018 10:12:41 UTC] WordPress database error Out of resources when opening file './sexbombe_wrdp3/wp_postmeta.MYD' (Errcode: 24 - Too many open files) for query SELECT post_id, meta_key, meta_value FROM wp_postmeta WHERE post_id IN (2035) ORDER BY meta_id ASC made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/plugins/wpforo/wpf-themes/classic/index.php'), dynamic_sidebar, WP_Widget->display_callback, WP_Widget_Media->widget, WP_Widget_Media_Image->render_media, WP_Widget_Media->is_attachment_with_mime_type, wp_attachment_is, get_attached_file, get_post_meta, get_metadata, update_meta_cache
• [17-Dec-2018 10:12:36 UTC] WordPress database error Can't open file: './sexbombe_wrdp3/wp_wpforo_forums.frm' (errno: 24 - Too many open files) for query SELECT count(*) FROM `wp_wpforo_forums` WHERE `parentid` = 49 AND `is_cat` = 0 made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/plugins/wpforo/wpf-themes/classic/index.php'), include('/plugins/wpforo/wpf-themes/classic/layouts/1/forum.php'), wpForoForum->get_forums
• [17-Dec-2018 10:12:35 UTC] WordPress database error Out of resources when opening file '/var/mysqltmp/#sql_bfc8b_4.MYD' (Errcode: 24 - Too many open files) for query SELECT * FROM `wp_wpforo_ads` WHERE `start_date` <= '2018-12-17 10:12:34' AND (`end_date` = '0000-00-00 00:00:00' OR `end_date` >= '2018-12-17 10:12:34') AND `forumids` REGEXP '(,|^)(0)(,|$)' AND `tpllocs` REGEXP '(,|^)(forum_loop)(,|$)' AND `status` = 1 ORDER BY RAND() made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/plugins/wpforo/wpf-themes/classic/index.php'), include('/plugins/wpforo/wpf-themes/classic/layouts/1/forum.php'), do_action('wpforo_loop_hook'), WP_Hook->do_action, WP_Hook->apply_filters, wpforo_do_loop_ads, wpForoAD->get_ads
• [17-Dec-2018 10:12:35 UTC] PHP Warning: mysqli_query(): (HY000/23): Out of resources when opening file '/var/mysqltmp/#sql_bfc8b_4.MYD' (Errcode: 24 - Too many open files) in /home2/sexbombed/shareforum.online/wp-includes/wp-db.php on line 1924