客户提出了一个需求,他们改进了自己的程序,想证明程序现在open cursor变少了,也就是说程序运行过程中 open cursor的峰值变小了. 我写了一个脚本来进行这个监控. oracle[aaa]@server:[/tmp/20140506]>more count.sql select count(*) from v$open_cursor where sid=264; oracle[aaa]@server:[/tmp/20140506]>more run.sh while true d…
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xxx...}: java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it. 要检查列名拼写!列名拼写…
Procedure & Function Procedure 语法: CREATE [DEFINER = { user | CURRENT_USER }] PROCEDURE sp_name ([proc_parameter[,...]]) [characteristic ...] routine_body proc_parameter: [ IN | OUT | INOUT ] param_name type type: Any valid MySQL data type characteri…
if exists(select * from sys.objects where name='info_one') drop table info_one go create table info_one ( id int , iName varchar() ) insert into info_one values(,'小明') insert into info_one values(,'小红') insert into info_one values(,'小白') declare @id…
If you deploy a DAC to a managed instance of the Database Engine, information about the deployed DAC is incorporated into the SQL Server Utility the next time the utility collection set is sent from the instance to the utility control point. You can…
Monitor里边有一些static方法,可以用于在对象上获取同步锁,来进行一些进程同步控制操作 用法及注意点如下: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading; using System.Threading.Tasks; namespace myTest { class Program { // 一个比较容易犯的错误 //…
5.9.6.4 cursor.MySQLCursorDict Class The MySQLCursorDict class inherits from MySQLCursor. This class is available as of Connector/Python 2.0.0. A MySQLCursorDict cursor returns each row as a dictionary. The keys for each dictionary object are the col…
参考来源: http://stackoverflow.com/questions/10298354/mongodb-cursor-id-not-valid-error http://stackoverflow.com/questions/24199729/pymongo-errors-cursornotfound-cursor-id-not-valid-at-server mongodb cursor id not valid error是一个超时错误. 当使用for c in col.f…
