2013年1月31日 星期四
MySQL Workbench 5.2 CE
執行MySQL Workbench 5.2 CE update or delete 時出現以下訊息
Error Code: 1175. You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column To disable safe mode, toggle the option in Preferences -> SQL Editor -> Query Editor and reconnect.
到工能表的Edit>Preferences>SQL Queries> General > 取消 "Safe Updates".Forbid UPDATEs and DELETEs whih no key in WHERE clause or no LIMIT clause. Requires a reconnection.
再重連接DB 就可以。
2013年1月25日 星期五
JBOSS Enable/disable hot-deployment
JBOSS 4.2.2.GA
In common with all application servers (I believe) redeployments chew up your jvm until you get memory allocation errors. You might get away with a few but a restart after hot-deployment is generally a good idea. If you want you can disable hot-deployment by setting the value below to false.
In common with all application servers (I believe) redeployments chew up your jvm until you get memory allocation errors. You might get away with a few but a restart after hot-deployment is generally a good idea. If you want you can disable hot-deployment by setting the value below to false.
In server/prod/conf/jboss-service.xml
＜！－－ A flag to disable the scans －－＞
＜attribute name="ScanEnabled"＞true＜/attribute＞
2013年1月24日 星期四
HeapDumpOnOutOfMemoryError
JBOSS 4.2.2.GA
/usr/local/jBoss/Base/bin/run.conf
找到 JAVA_OPTS="-showversion -Xms256m -Xmx1024m .....
在jvm的 启动参数中追加 下列信息，可以在发生 OutOfMemoryError的时候生成 oom.hprof文件
-XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=C:/temp/oom.hprof
訂閱：
文章 (Atom)