私のホストはこのログを私に与えてくれ、そのmySQLが私のサーバーをオーバーロードしていることを教えてくれます:
| 266976 | db_name | localhost | db_name | Query | 30 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 266978 | db_name | localhost | db_name | Query | 29 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 266980 | db_name | localhost | db_name | Query | 45 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 266996 | db_name | localhost | db_name | Query | 43 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267002 | db_name | localhost | db_name | Query | 44 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267008 | db_name | localhost | db_name | Query | 10 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267011 | db_name | localhost | db_name | Query | 30 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267013 | db_name | localhost | db_name | Query | 30 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267016 | db_name | localhost | db_name | Query | 30 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267018 | db_name | localhost | db_name | Query | 13 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267023 | db_name | localhost | db_name | Query | 30 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267033 | db_name | localhost | db_name | Query | 44 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267034 | db_name | localhost | db_name | Query | 44 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267040 | db_name | localhost | db_name | Query | 43 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267041 | db_name | localhost | db_name | Query | 10 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267050 | db_name | localhost | db_name | Query | 42 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267058 | db_name | localhost | db_name | Query | 38 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267060 | db_name | localhost | db_name | Query | 29 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267062 | db_name | localhost | db_name | Query | 30 | Copying to tmp table | SELECT p.* FROM wp2_posts AS p INNER JOIN wp2_term_relationships AS tr ON p.ID = tr.object_id INNER |
| 267072 | db_name | localhost | db_name | Query | 34 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267075 | db_name | localhost | db_name | Query | 34 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267076 | db_name | localhost | db_name | Query | 30 | Copying to tmp table | SELECT p.* FROM wp2_posts AS p INNER JOIN wp2_term_relationships AS tr ON p.ID = tr.object_id INNER |
| 267084 | db_name | localhost | db_name | Query | 19 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267087 | shonline | localhost | shonline_sho2011 | Query | 15 | update | INSERT INTO accesslog (title, path, url, hostname, uid, sid, timer, timestamp) VALUES ('???? |
| 267088 | db_name | localhost | db_name | Query | 2 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
| 267089 | db_name | localhost | db_name | Query | 30 | Copying to tmp table | SELECT SQL_CALC_FOUND_ROWS wp2_posts.* FROM wp2_posts INNER JOIN wp2_term_relationships ON (wp2_po |
サーバーは、Xeonクアッドコア、4GB RAM、2Mビットのアップ/ダウン帯域幅です。毎月200万人の訪問者。 Apacheを500に同時設定し、SQLを250に設定しました。
プラグイン:Adrotate/Contact Form 7/Disqus/Events/Jetpack/Really Simple Captcha/Use Google Libraries/WebsiteDefender/Wordpress.com Popular Posts/WP-Page Navi/WP-Print/WP-Minify/WP-Super Cache
どうすれば修正できますか?
Copying to tmp table
が表示される場合、それは多くの場合、実行に時間がかかる悪いクエリを作成したことを示しています。投稿には、実行に45秒以上かかっているものがいくつか表示されています。実行に時間がかかるクエリを特定します。
インデックスを適切に使用するには、これらのクエリを変更する必要があります。それには、どのプラグインがそれらを開始しているのかを知る必要があるかもしれません。
「現在の訪問者」には興味がありませんが、同時訪問者の数には興味があります。 wordpressには、同時ユーザーの数をカウントできるプラグインはありません。確認すべきことがいくつかあります。