Errors on PHP log about database

[7starsone]

Hello, I have these errors on log every day:

[17-Jan-2018 19:09:00 UTC] WordPress database error Lock wait timeout exceeded; try restarting transaction for query UPDATE wp_optionsSEToption_value= 'a:2:{s:8:\"messages\";a:25:{i:0;a:3:{s:7:\"message\";s:67:\"Pinged <em>Google</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 15:07:42\";}i:1;a:3:{s:7:\"message\";s:65:\"Pinged <em>Bing</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 15:07:42\";}i:2;a:3:{s:7:\"message\";s:66:\"Successfully served a cached version of <em>sitemapindex.xml</em>.\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 15:07:43\";}i:3;a:3:{s:7:\"message\";s:67:\"Pinged <em>Google</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 16:00:05\";}i:4;a:3:{s:7:\"message\";s:65:\"Pinged <em>Bing</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 16:00:05\";}i:5;a:3:{s:7:\"message\";s:66:\"Successfully served a cached version of <em>sitemapindex.xml</em>.\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 16:00:05\";}i:6;a:3:{s:7:\"message\";s:77:\"Successfully generated <em>site.xml</em> using module file <em>site.php</em>.\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 16:44:58\";}i:7;a:3:{s:7:\"message\";s:67:\"Pinged <em>Google</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 17:02:03\";}i:8;a:3:{s:7:\"message\";s:65:\"Pinged <em>Bing</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 17:02:03\";}i:9;a:3:{s:7:\"message\";s:66:\"Successfully served a cached version of <em>sitemapindex.xml</em>.\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 17:02:04\";}i:10;a:3:{s:7:\"message\";s:93:\"Successfully generated <em>sitemapindex.xml</em> using module file <em>sitemapindex.php</em>.\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 17:09:55\";}i:11;a:3:{s:7:\"message\";s:66:\"Successfully served a cached version of <em>sitemapindex.xml</em>.\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 17:10:08\";}i:12;a:3:{s:7:\"message\";s:66:\"Successfully served a cached version of <em>sitemapindex.xml</em>.\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 17:10:09\";}i:13;a:3:{s:7:\"message\";s:67:\"Pinged <em>Google</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 19:00:07\";}i:14;a:3:{s:7:\"message\";s:65:\"Pinged <em>Bing</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 19:00:07\";}i:15;a:3:{s:7:\"message\";s:67:\"Pinged <em>Google</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 19:00:10\";}i:16;a:3:{s:7:\"message\";s:65:\"Pinged <em>Bing</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 19:00:10\";}i:17;a:3:{s:7:\"message\";s:67:\"Pinged <em>Google</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 19:00:13\";}i:18;a:3:{s:7:\"message\";s:65:\"Pinged <em>Bing</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 19:00:13\";}i:19;a:3:{s:7:\"message\";s:67:\"Pinged <em>Google</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 19:00:15\";}i:20;a:3:{s:7:\"message\";s:65:\"Pinged <em>Bing</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 19:00:15\";}i:21;a:3:{s:7:\"message\";s:67:\"Pinged <em>Google</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 19:00:21\";}i:22;a:3:{s:7:\"message\";s:65:\"Pinged <em>Bing</em> with <em>sitemapindex.xml</em> successfully!\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 19:00:21\";}i:23;a:3:{s:7:\"message\";s:66:\"Successfully served a cached version of <em>sitemapindex.xml</em>.\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 19:00:22\";}i:24;a:3:{s:7:\"message\";s:66:\"Successfully served a cached version of <em>sitemapindex.xml</em>.\";s:4:\"type\";s:7:\"success\";s:8:\"datetime\";s:19:\"2018-01-17 19:08:09\";}}s:8:\"sitemaps\";a:7:{i:0;a:2:{s:4:\"slug\";s:12:\"sitemapindex\";s:8:\"datetime\";s:19:\"2018-01-17 17:09:55\";}i:1;a:2:{s:4:\"slug\";s:4:\"site\";s:8:\"datetime\";s:19:\"2018-01-17 16:44:58\";}i:2;a:2:{s:4:\"slug\";s:4:\"page\";s:8:\"datetime\";s:19:\"2018-01-16 15:25:39\";}i:3;a:2:{s:4:\"slug\";s:10:\"post_part3\";s:8:\"datetime\";s:19:\"2018-01-17 11:26:39\";}i:4;a:2:{s:4:\"slug\";s:10:\"post_part1\";s:8:\"datetime\";s:19:\"2018-01-17 13:34:16\";}i:5;a:2:{s:4:\"slug\";s:10:\"post_part2\";s:8:\"datetime\";s:19:\"2018-01-17 04:48:24\";}i:6;a:2:{s:4:\"slug\";s:10:\"post_part4\";s:8:\"datetime\";s:19:\"2018-01-17 04:46:54\";}}}' WHEREoption_name = 'bwp_gxs_log' fatta da require('wp-blog-header.php'), wp, WP->main, WP->parse_request, do_action_ref_array, WP_Hook->do_action, WP_Hook->apply_filters, BWP_Sitemaps->request_sitemap, BWP_Sitemaps->_load_sitemap_module, BWP_Sitemaps->_load_sitemap_from_cache, BWP_Sitemaps->commit_logs, BWP_WP_Bridge->__call, update_option

so, is it related to pinging ? and what shoud I do?

Thanks