第一步:创建演示程序:打开SQL SERVER查询分析器,在SQL SERVER测试数据库中执行下列脚本(脚本执行操作:创建表testtable,并插入一条记录;创建存储过程test):
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Test]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[Test]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[testtable]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[testtable]
GO
CREATE TABLE [dbo].[testtable] (
[testid] [int] NULL ,
[counts] [int] NULL
) ON [PRIMARY]
GO
insert into testtable (testid,counts) values (1,0)
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
CREATE Procedure dbo.Test
as
declare @count int
begin tran TEST
select @count=counts from testtable where testid=1
update testtable set counts=@count+1
if (@@error >0) begin
rollback tran TEST
end else begin
commit tran TEST
end
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
第二步:创建测试脚本:在Robot中新建VU脚本,输入以下内容:
#include <VU.h>
{
push Timeout_scale = 200; /* Set timeouts to 200% of maximum response time */
push Think_def = "LR";
Min_tmout = 120000; /* Set minimum Timeout_val to 2 minutes */
push Timeout_val = Min_tmout;
ser=sqlconnect("server","sa","888","192.168.0.99","sqlserver");
set Server_connection = ser;
push Think_avg = 0;
sync_point "logon";
sqlexec ["sql_1000"] "testdb..test";
sqldisconnect (ser);
}
说明:
ser=sqlconnect("server","sa","888","192.168.0.99","sqlserver")
sa为数据库用户名,888为sa密码,192.168.0.99数据库IP地址
以上三项按实际的测试数据库设置更改,其他两项不用修改
sqlexec ["sql_1000"] "testdb..test"
testdb为新建存储过程test所在的数据库,按实际的数据库修改
第三步:执行测试:运行上一步创建的脚本(运行时自动创建Suite),在Run Suite窗口中的“Number of users”上输入20。运行完脚本,打开数据库查看counts的数值。把counts值改为零多次运行脚本,观察每次运行后counts的结果。
测试说明
(1)、测试示例程序的目的是,存储过程test每执行一次,表testtable中的counts字段增加一;
(2)、第三步的测试可以发现每次执行后counts结果并不相同,而且不等于20,这说明这个程序是在并发时是问题的。
(3)、将存储过程中的select @count=counts from testtable where testid=1修改为select @count=counts from test