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 1. -static  13%
   --with-client-ldflags=-all-static
   --with-mysqld-ldflags=-all-static
¾²Ì¬Á´½ÓÌá¸ß13%ÐÔÄÜ
2. -pgcc  1%
   CFLAGS="-O3 -mpentiumpro -mstack-align-double" CXX=gcc \
     CXXFLAGS="-O3 -mpentiumpro -mstack-align-double \
     -felide-constructors -fno-exceptions -fno-rtti"
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3. Unix Socket  7.5%
   --with-unix-socket-path=/usr/local/mysql/tmp/mysql.sock
ʹÓÃunixÌ×½Ó×ÖÁ´½ÓÌá¸ß7.5%ÐÔÄÜ£¬ËùÒÔÔÚwindowsÏÂmysqlÐÔÄܿ϶¨²»ÈçunixÏÂÃæ
4. --enable-assembler
ÔÊÐíʹÓûã±àģʽ(ÓÅ»¯ÐÔÄÜ)
  
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CFLAGS="-O3" CXX=gcc CXXFLAGS="-O3 -felide-constructors \ 
       -fno-exceptions -fno-rtti -fomit-frame-pointer -ffixed-ebp"  
    ./configure \  
       --prefix=/usr/local/mysql --enable-assembler \  
       --with-mysqld-ldflags=-all-static  
       --with-client-ldflags=-all-static  
       --with-unix-socket-path=/usr/local/mysql/tmp/mysql.sock  
     --with-charset=utf8  
       --with-collation=utf8_general_ci  
       --with-extra-charsets=all  


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MySQLµÄ²éѯÓÅ»¯ºÜɵ

select id from message where author_id in (select followed_id from Relation where follower_id=1) order by id desc   ºÍ ·Ö±ðÖ´ÐÐ $userlist = select followed_id from Relation where follower_id=1 ÔÙ select id from message where author_id in ($userlist) order by id desc   ¾¹È»ÓÐÁ½¸öÊýÁ ......

Linux+Apache+Mysql+PHPµäÐÍÅäÖÃ


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http://www.5ilinux.com/lamp01.html
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µ÷ÊÔ»·¾³£ºRedhat9.0 Apache1.3.29 Mysql3.23.58 PHP4.3.4
LinuxϵͳµÄ°²×°ÎҾͲ»½²Á ......

ͨ¹ýshow status À´ÓÅ»¯MySQLÊý¾Ý¿â

 
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1, ²é¿´MySQL
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mysql> show variables;
mysql> show variables;
2, ²é¿´MySQL·þÎñÆ÷ÔËÐеĸ÷ÖÖ״ֵ̬
mysql> show global status;
mysql> show global status;
3, Âý²éѯ
mysql> show variables like '%slow%';  
+--------------- ......

PenroseÁ¬½ÓMysql½â¾ö·½°¸

 ×î½üÒ»Ö±ÔÚ½øÐÐPenroseÁ¬½ÓMysqlµÄ³¢ÊÔ£¬¿É×ÜÊÇÌáʾÎÞ·¨Á¬½Óµ½Mysql£¬ÎÞÂÛÊǼì²é¶Ë¿ÚÊÇ·ñ¿ªÆô£¬ÉèÖÃMysqlÔ¶³Ì·ÃÎÊȨÏ޵ȶ¼²»¹ÜÓ㬺óÀ´ÔÚPenroseµÄ¹ÙÍøÕÒµ½Ò»¸ö½¨Á¢ÑùÀýÊý¾Ý¿â¼°ÉèÖÃÔ¶³ÌÁ¬½ÓµÄÎĵµ£¬Ã»Ïëµ½Ò»¾Ù³É¹¦£¬Í´¿ì°¡£¡
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mysqlµÄ×Ö·û´®º¯Êý

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ASCII(str) ·µ»Ø×Ö·û´®strµÄ×î×óÃæ×Ö·ûµÄASCII´úÂëÖµ¡£Èç¹ûstrÊÇ¿Õ×Ö·û´®£¬·µ»Ø0¡£Èç¹ûstrÊÇNULL£¬·µ»ØNULL¡£
mysql> select ASCII('2');
-> 50
mysql> select ASCII(2);
-> 50
mysql> select ASCII('dx');
-> 100
Ò² ......
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