mySQLÑÓ³Ù
ÔÚÖ÷Íâ¼ü±í´æÔÚ¹ØÏµµÄʱºòÈç¹û¼ÓÉÏ"lazy=true"µÄ»°£¬Ôò±íÃ÷ÑÓ³Ù£¬¼´Ö»²éѯÖ÷±íÖеÄÄÚÈÝ£¬¶ø²»²éѯÍâ¼ü±íÖеÄÄÚÈÝ¡£
Àý£º
<hibernate-mapping>
<class name="com.pojo.Sortp" table="sortp" catalog="shjdc">
<id name="id" type="java.lang.Integer">
<column name="Id" />
<generator class="assigned" />
</id>
<property name="name" type="java.lang.String">
<column name="Name" length="40" not-null="true" />
</property>
<set name="productses" inverse="true" cascade="all" lazy="true">
<key>
<column name="Sortid" not-null="true" />
</key>
<one-to-many class="com.pojo.Products" />
</set>
</class>
</hibernate-mapping>
Ò»°ãÇé¿öϾÍÊǰÑlazyÉèΪtrue£¬¶ø²»ÊÇfalse£¬ÒòΪ£¬¼ÙÈçÉèΪfalseµÄ»°£¬ÔÚÖ´ÐвéѯÖ÷±íµÄͬʱ£¬ÏàÓ¦µÄ×Ó±íÒ²»á²éѯ£¬Ìí¼ÓÁËÐí¶àÎÞÓù¦¡£
Ïà¹ØÎĵµ£º
±¾ÎÄʵÀý£¬ÔËÐÐÓÚ MySQL 5.0 ¼°ÒÔÉϰ汾¡£
MySQL ¸³ÓèÓû§È¨ÏÞÃüÁîµÄ¼òµ¥¸ñʽ¿É¸ÅÀ¨Îª£º
grant ȨÏÞ on Êý¾Ý¿â¶ÔÏó to Óû§
Ò»¡¢grant ÆÕͨÊý¾ÝÓû§£¬²éѯ¡¢²åÈë¡¢¸üС¢É¾³ý Êý¾Ý¿âÖÐËùÓбíÊý¾ÝµÄȨÀû¡£
grant select on testdb.* to common_user@'%'
grant insert on testdb.* to common_user@'%'
grant update o ......
ÎÊ£ºÈç¹ûÍü¼ÇÁËMySQLµÄrootÃÜÂëÓ¦µ±ÈçºÎÈ¡»Ø£¿
´ð£º½â¾ö·½·¨ÈçÏ£º
·¨1£ºÔÚmy.cnfµÄ[mysqld]×ֶμÓÈ룺
skip-grant-tables
È»ºóÖØÆôÄãµÄmysqld,ÕâÑù¾ÃûÓÐÃÜÂëÁË.
È»ºó½øÈëmysql¡£
UPDATE mysql.user SET Password=PASSWORD
('password') WHERE User='root';
³É¹¦ºó
FLUSH PRIVILEGES;
×îºóÈ¥µômy.cnfÖеÄs ......
а²×°ºóµÄmysqlÊý¾Ý¿â£¬ÆäĬÈϵÄ×î´óÁ¬½ÓÊýΪ100¡£
·½·¨Ò»£º
ÔÚmysql°²×°Â·¾¶Ï£¬ÕÒµ½my.ini»òÕßmy.cnfÎļþ£¬´ò¿ªËüÕÒµ½max_connections,ÉèÖóÉ1000; È»ºóÖØÆômysql·þÎñ¡£
·½·¨¶þ£º
ÔÚmysqlÔËÐл·¾³Ï£¬½øÈëmysqlÃüÁîÏ£º
mysql> set global max_connections=1000;
È»ºó¹Ø±ÕmysqlÖØÆôËü£»
ÔÚ./bin·¾¶Ï£¬Ê¹Óà # ......
MySQLÓкܶà¿ÉÒÔµ¼ÈëÊý¾ÝµÄ·½·¨£¬È»¶øÕâЩֻÊÇÊý¾Ý´«ÊäÖеÄÒ»°ë£¬ÁíÍâµÄÒ»°ãÊÇ´ÓMySQLÊý¾Ý¿âÖе¼³öÊý¾Ý¡£ÓÐÐí¶àµÄÔÒòÎÒÃÇÐèÒªµ¼³öÊý¾Ý¡£Ò»¸öÖØ
ÒªµÄÔÒòÊÇÓÃÓÚ±¸·ÝÊý¾Ý¿â¡£Êý¾ÝµÄÔì¼Û³£³£Êǰº¹óµÄ£¬ÐèÒª½÷É÷´¦ÀíËüÃÇ¡£¾³£µØ±¸·Ý¿ÉÒÔ°ïÖú·ÀÖ¹±¦¹óÊý¾ÝµØ¶ªÊ§£»ÁíÍâÒ»¸öÔÒòÊÇ£¬Ò²ÐíÄúÏ£Íûµ¼³öÊý¾ÝÀ´¹²
Ïí¡£ ÔÚÕâ¸öÐÅÏ¢¼¼Ê ......
MySQLÅäÖÃÎļþ
MySQL·¢²¼µÄ×îвúƷʵ¼ÊÉϳ¬³öÁËLinuxËùЯ´øµÄ°æ±¾¡£µ«ÊÇ£¬Îȶ¨ÐԺͿª·ÅÔ´´úÂë¿ÉÊǺÜÖØÒªµÄÒòËØ£¬Òò´ËÔÚ²Ù×÷ϵͳÉÏʹÓýÏÔçMySQL°æ±¾ÊÇÓеÀÀíµÄ¡£
ÓÐÐí¶à¿ÉÒÔ²ÉÓõÄÅäÖÃÎļþ£¬ËüÃǶ¼±»°üº¬ÔÚmysql-server PRM³ÌÐòÖС£»¹ÓÐÒ»¸öĬÈϵÄÅäÖÃÎļþ±»°üº¬ÔÚmysql PRM³ÌÐò°üÖС£
ÅäÖÃMySQL·þÎñÆ÷ÊÇÒ»¸ö·á¸»¶ø¸´ÔÓ ......