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1, MySQL profiling
 mysql> set profiling = 1;
 mysql> select count(*) from test;
 mysql> show profiles;
 mysql> show profile for query 1;
2,mysql ¼à¿Ø
http://bbs.linuxtone.org/thread-1854-1-1.html
http://code.google.com/p/mysql-cacti-templates/   -> High performance for mysql ×÷ÕßдµÄCactiÄ£°å


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http://blog.csdn.net/cs870101/archive/2009/09/23/4580879.aspx
ת×Ô:http://blog.chinaunix.net/u2/85344/showart_2042280.html
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1.²éÕÒMySQLµÄcnfÎļþµÄλÖÃ
find / -iname '*.cnf' -print
/usr/share/mysql/my-innodb-heavy-4G.cnf
/usr/share/mysql/my-la ......

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sudo apt-get install mysql-server #Ö±½Ó×Ô¶¯»ñµÃ¿ÉÓð汾
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sudo apt-get install mysql-server-5.0 #°²×°mysql·þÎñÆ÷5.0°æ±¾
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/etc/init.d/mysql start (stop) ΪÆô¶¯ºÍÍ£Ö¹·þÎñÆ÷
/etc/mysql/ Ö÷ÒªÅäÖÃÎļþËùÔÚλÖà my.cnf
/var/lib/mysql/ ·ÅÖõÄÊÇÊý¾Ý¿â±íÎļþ¼Ð£¬ÕâÀïµÄm ......

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C:\Documents and Settings\Administrator>mysql -h localhost -u root -p
Enter password: *****
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 69
Server version: 5.0.51a-community-nt MySQL Community Edition (GPL)
Type 'help;' or '\h' fo ......

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CREATE TRIGGER trigger_name trigger_time trigger_event
       ON tbl_name FOR EACH ROW trigger_stmt
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