Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

ÔõôÑùÐÞ¸Ämysqlµ¼ÈëÎļþ´óСÏÞÖÆ

×Ô¼ºµçÄÔÉÏ×°µÄWAMP£¬ÔÚµ¼ÈëÊý¾Ý¿â±È½Ï´ó£¨´óÓÚ2M£©Ê±Óöµ½´íÎ󣬲»Äܵ¼Èë¡£
ÕÒµ½½â¾ö·½·¨£º php.iniÅäÖÃÎļþÖÐÓÐÈý´¦µØ·½ÐèÒª¸Ä¶¯£º
upload_max_filesize
memory_limit
post_max_size
ÕâÈý¸öÖµ¶¼¹¤¾ßʵ¼ÊÇé¿ö¸ÄÏ£¬ÖØÆô·þÎñÆ÷ÒÔºó£¬ËäÈ»µ¼ÈëʱÈÔÈ»ÏÔʾÊÇ ×î´óÏÞÖÆ£º2,048 KB) £» µ«Êµ¼ÊÉÏÒѾ­¿ÉÒÔµ¼ÈëºÜ´óµÄÊý¾Ý¿âÁË¡£¡£¡£


Ïà¹ØÎĵµ£º

MySQL´¥·¢Æ÷

MySQL´¥·¢Æ÷
Ò»¡¢ MySQL´¥·¢Æ÷¸ÅÄî
MySQL5.0ÒÔÉϰ汾֧³Ö´¥·¢Æ÷£¬´¥·¢Æ÷ÊÇÓë±íÓйصÄÃüÃûÊý¾Ý¿â¶ÔÏ󣬵±±í³öÏÖÌØ¶¨Ê¼þʱ£¬½«¼¤»î¸Ã¶ÔÏó¡£
¶þ¡¢ MySQL´¥·¢Æ÷Óï·¨
CREATE TRIGGER trigger_name trigger_time trigger_event
       ON tbl_name FOR EACH ROW trigger_stmt
trigger ......

PHPÖеÄMYSQL³£Óú¯Êý×ܽá

PHPÖеÄMYSQL³£Óú¯Êý×ܽá
1¡¢mysql_connect()-½¨Á¢Êý¾Ý¿âÁ¬½Ó
¸ñʽ£º
    resource mysql_connect([string hostname [:port] [:/path/to/socket] [, string username] [, string password]])
Àý£º
    $conn = @mysql_connect("localhost", "username", "password") or dir( ......

Mysql Explain Ïê½â[Ç¿ÁÒÍÆ¼ö]

Mysql Explain Ïê½â
Ò».Óï·¨
explain < table_name >
ÀýÈç: explain select * from t3 where id=3952602;
¶þ.explainÊä³ö½âÊÍ
+----+-------------+-------+-------+-------------------+---------+---------+-------+------+-------+
| id | select_type | table | type  | possible_keys  &nb ......

mysqlÉèÖÃbitÀàÐÍÊý¾Ý


Êý¾Ý¿âµÄÒ»ÕűíÀïÃæ´æÁ˹ØÓÚһ̨É豸µÄ±¸·ÝÅäÖÃÐÅÏ¢£¬ÀàÐÍÊÇbit£¬Ö÷Òª¾ÍÊÇÊÇ·ñÒѾ­ÅäÖã¬ÉèÖõÄʱºòȡֵÊÇtrue,false,»¹ÊÇ0£¬1ÄØ£¿
¾À½áÁ˰ëÌ죬¶¯Ê־ͺÃÁË£¬ÊÇ0£¬1£¬¶ø·Çtrue,false£¬
¸üÐÂÓï¾äÈçÏÂ
update  table_a
set configBaked= 0
where id in (2,3,4)
......

ʹÓÃtcmallocºóµÄMySQL·þÎñÆ÷±äÎȶ¨ÁË£¨Linux£©

֮ǰ£¬Ò»Ö±À§ÄպܾõÄMySQLµÄÎÊÌâÒòΪÓÐÁËtcmallocºóµÃÒÔ½â¾ö¡£
ÎÊÌâÊÇ£ºÍøÕ¾·ÃÎÊÁ¿²»¸ß£¬¸ß·åʱ²¢·¢ÊýÔÚ300-400Ö®¼ä¡£CPU±È½Ï¸ß£¬ÔÚ30-80%Ö®¼ä²¨¶¯µÃÀ÷º¦£¬Ê¹ÓÃtopÃüÁî¿ÉÒÔ¿´µ½ÊÇmysql½ø³Ìµ¼Ö£¬Í¬Ê±ÓÃiostatºÍsar²é¿´iowaitÖµºÜ¸ßÔÚ20-30Ö®¼ä¡£
µ«ÊÇϵͳ»¹¿ÉÒÔÎȶ¨ÔËÐУ¬È»ºóÖÜÆÚÐԵijöÏÖswap·ÖÇøÕ¼ÓÃÂÊÅÊÉý£¬Ö±½Óµ¼Ö ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ