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[mysql] MySQL 閮剖 閮瑁 SQL 隤瘜

[銴鋆賡包
頝唾唳摰璅撅
璅銝
潸” 2015-11-8 22:27:36 | 芰閰脖 撣 |摨閬 |梯璅∪

蝔撘 Debug 敺敺Y洵銝銵餈質絲靘敺颲(蝔撘蝣澆云憭 compile ), 虫蝔桀瘜撠望臬敺W餈, 甇敺撖怠亦 DB, 撠勗 DB 憪敺, 隞亙停航蝔撘臬瑁芯 SQL 隤瘜.(隞乩芯誑 MySQL 箔蜓)

銋券餈質馱瘜舐 tcpdump wireshark 3306 port,憭芾

MySQL 撟曄車寞臭誑, 撠隞交甇∠嗡葉銝蝔, /etc/my.cnf(CentOS), restart mysql 喳:

蝚砌蝔: Slow query SQL 隤瘜:

  • log_slow_queries = /var/log/mysql/mysql-slow.log
  • long_query_time = 2 (頞 2蝘 SQL 隤瘜閮韏瑚, 閮剔凋暺靘閮日臭臭蝔格寞 XD)* A4 w% Q, D: y( d4 C9 a9 u

蝚砌蝔: 閮 MySQL Replication binlog:

  • log_bin = /var/log/mysql/mysql-bin.log (甇斗閬 mysqlbinlog 閫靘)
  • mysql 撠 INSERT/UPDATE/DELETE 隤瘜閮潭迨(雿航瘜航質雿喟銝), 航撖怎策 SLAVE 函 log 瑼2 W% r8 |; Q/ `' r

蝚砌蝔: 刻行迨寞, 撠 MySQL 瑁瘥銵隞文券質韏瑚:

  • log = /var/log/mysql/mysql.log
    # W. K" u3 v) L* G8 ^, E

restart mysql 敺, tail -f /var/log/mysql/mysql.log 撠勗臭誑啣!


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