最近Plnetで遅いクエリが溜まっていってあっという間にmax-connectionに到達してたんですが、mysqldumpslow(slowログをサマリしてくれるヤツ)で一番重いのを修正したら調子が良くなった。

Webサーバの死活監視にmontasticを使い始めたとたんに携帯にメールが糞来まくって追い詰められ、重い腰をやっと上げた結果です・・・。

sudo mysqldumpslow /var/log/mysql/mysql-slow.log
Count: 4  Time=104.75s (419s)  Lock=0.00s (0s)  Rows=1.0 (4), plnet[plnet]@local
host
  SELECT COUNT(e.id) AS CNT
  FROM  member_to_feed m2f
  JOIN feed f ON m2f.feed_id = f.id
  JOIN entry e ON f.id = e.feed_id
  WHERE DATE_FORMAT(e.date, 'S') = 'S'
  AND m2f.member_id = 'S'

Count: 5  Time=73.00s (365s)  Lock=0.00s (0s)  Rows=12.0 (60), plnet[plnet]@loca
lhost
  SELECT e.id, e.uri, e.title, e.description, e.author,
  UNIX_TIMESTAMP(e.date) AS date,
  f.title AS feed_title, f.link AS feed_link,
  f.uri AS feed_uri, f.favicon
  FROM  member_to_feed m2f
  JOIN feed f ON m2f.feed_id = f.id
  JOIN entry e ON f.id = e.feed_id
  WHERE DATE_FORMAT(e.date, 'S') = 'S'
  AND m2f.member_id = 'S'
  ORDER BY e.date DESC LIMIT N, N

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