重い原因をいろいろ調べている。
mysql-slow.logをみていたら頻繁に登場するクエリーで遅延が出ていた。
3つくらいあったので修正。
さらに、クソ重いのでプロセスをみてみたら以下のようなカンジ。
そのままコピペするとアレなのでテーブルとかデータベース名は変更して掲載。
mysql> show processlist; +-------+----------+-----------+----------+---------+------+-- | Id | User | Host | db | Command | Time | State | Info +-------+----------+-----------+----------+---------+------+-- | 15597 | negi | localhost | negi | Sleep | 30 | | NULL | | 15718 | negi | localhost | negi | Query | 33 | Locked | LOCK TABLES counter_news write | | 15727 | negi | localhost | negi | Query | 31 | Locked | LOCK TABLES counter_news write | | 15799 | negi | localhost | negi | Query | 31 | Locked | SELECT hit,news_id FROM counter_news WHERE news_id = 6163 | | 15801 | negi | localhost | negi | Query | 29 | Locked | SHOW TABLE STATUS FROM `negi` | | 15802 | negi | localhost | negi | Query | 29 | Locked | SELECT hit,news_id FROM counter_news WHERE news_id = 6163 | | 15808 | negi | localhost | negi | Query | 26 | Locked | SELECT hit,news_id FROM counter_news WHERE news_id = 6160 | | 15809 | negi | localhost | negi | Query | 26 | Locked | SELECT hit,news_id FROM counter_news WHERE news_id = 6164 | | 15810 | negi | localhost | negi | Query | 26 | Locked | SELECT hit,news_id FROM counter_news WHERE news_id = 6160 | | 15813 | negi | localhost | negi | Query | 26 | Locked | SELECT hit,news_id FROM counter_news WHERE news_id = 3582 | | 15815 | negi | localhost | negi | Query | 26 | Locked | SELECT hit,news_id FROM counter_news WHERE news_id = 6164 | | 15827 | negi | localhost | negi | Query | 15 | Locked | SELECT hit,news_id FROM counter_news WHERE news_id = 6160 | | 15830 | negi | localhost | negi | Query | 9 | Locked | LOCK TABLES counter_news write | | 15831 | negi | localhost | negi | Query | 0 | NULL | show processlist | | 15837 | negi | localhost | negi | Query | 4 | Locked | SELECT hit,news_id FROM counter_news WHERE news_id = 6162 | +-------+----------+-----------+----------+---------+------+--------+----------個別記事へのアクセスが多いんだけど、そこでまわしているカウンタの処理が詰まっていてパフォーマンスが低下しているっぽい。 ファイルでカウントするかなあ。 でもそうするといろいろ不便なんだよなあ。
