思考时间的理解处理

用户访问某个网站或软件，一般不会不停地做个各种操作，例如一次查询，用户需要时间查看查询的结果是否是自己想要的。例如一次订单提交，用户需要时间核对自己填写的信息是否正确等。也就是说用户在做某些操作时，是会有停留时间的，我把这个时间叫思考时间。但利用代码去执行的时候是没有时间的，当然，脚本运行本身是需要时间的，但比起人的思考时间要小很多。这也是我们为什么要用软件来代替人的某些工作。但有时候，我们在做性能测试时，为了更真实的模拟用户的操作，需要给代码加入思考时间。来看看在loadrunner是如何设置思考时间的。打开loadrunner的VirtualUserGenerator菜单栏：Vuser---Run-Timesettings...,切换到TharkTime选项好吧！为了更好的理解这个界面上设置，现在我们通过一个脚本来分析。Action()(doubletrans_time;//定义变量web_url"","URL=/","Resource=0","RecContentType=text/html","Referer=","Snapshot=t1.inf","Mode=HTML",LAST);web_url"i-1.0.0.png","URL=/r/www/img/iT.0.0.png","Resource=1","RecContentType=image/png","Referer=/","Snapshot=t2.inf",LAST);web_url"favicon,ico","URL=/favicon.ico","Resource=1","RecContentType=image/x-icon","Referer=","Snapshot=t3.inf",LAST);web_url"su","URL=/su?wd=&cb=window.bdsug.sugPreRequest&sid=1466&t=1362316450913",Resource=1","RecContentType=baiduapp/json","Referer=/","Snapshot=t4.inf",LAST);lr_start_transaction"注册");//添加事务lr_think_time20);/设置思考时间web_url"v.gif","URL=/v.gif?pid=201&pj=www&rsv_sid=1466&fm=behs&tab=tj_reg&un=&path=http%3A%2F%2F%2F&t=1362316485456","Resource=1","Referer=/",LAST);web_url"favicon.ico_2","URL=/favicon.ico","Resource=1","RecContentType=application/octet-stream","Referer=","Snapshot=t5.inf",LAST);web_link"注册"，"Text=注册","Snapshot=t6.inf",LAST);web_custom_request"urs.asmx","URL=/urs.asmx?MSURS-Client-Key=WI0pAZHPdb%2b3UDOD0AtzxA%3d%3d&MSURS-Patented-Lock=S1IpDfNCCC4%3d","Method=POST",Resource=0",RecContentType=text/xml","Referer=","Snapshot=t7.inf","Mode=HTML","EncType=text/xml;charset=utf-8","Body=<RepLookupv=\"3\"><G>ED8654D5-B9F0-4DD9-B3E8-F8F560086FDF</G><O>F03F2D77-79E1-4DEC-BBF8-81A5C0790160</O><D>9・0・8110・0</D><C>9・00・8112・16421</C><OS>6・1・7601・1・0</OS><I>9・0・8112・16421</I><L>zh-CN</L><R><Rq><URL>aHR0cHM6Ly9wYXNzcG9ydC5iYWlkdS5jb20vdjIvP3JlZyZyZWdUeXBlPTEmdHBsPW1uJnU9aHR0cCUzQSUyRiUyRnd3dy5iYWlkdS5jb20lMkY=</URL〉<O〉PRE</O〉<T〉TOP</T〉<HIP〉220・181・111・48</HIP〉</Rq〉</R〉</RepLookup>",EXTRARES,"Url=https://passport・baidu・com/img/topbarnav_bg・png","Referer=https://passport・baidu・com/v2/?reg®Type=1&tpl=mn&u=http%3A%2F%2Fwww・baidu・com%2F",ENDITEM,"Url=https://passport,/passApi/js/reg_6e270622.js","Referer=https://passport・baidu・com/v2/?reg®Type=1&tpl=mn&u=http%3A%2F%2Fwww・baidu・com%2F",ENDITEM,"Url=https://passport・baidu・com/passApi/img/small_blank_9dbbfbb1.gif","Referer=https://passport・baidu・com/v2/?reg®Type=1&tpl=mn&u=http%3A%2F%2Fwww・baidu・com%2F",ENDITEM,LAST);web_url"api","URL=https://passport・baidu・com/v2/api/?getapi&tpl=mn&apiver=v3&tt=1362316491971&class=reg&callback=bdcbsc93h6w","Resource=0","RecContentType=text/html","Referer=https://passport・baidu・com/v2/?reg®Type=1&tpl=mn&u=http%3A%2F%2Fwww・baidu・com%2F","Snapshot=t8.inf","Mode=HTML",EXTRARES,"Url=/img/v・gif?type=1®Type=mail","Referer=https://passport・baidu・com/v2/?reg®Type=1&tpl=mn&u=http%3A%2F%2Fwww・baidu・com%2F",ENDITEM,LAST);web_url"api_2","URL=/v2/api/?getapi&tpl=mn&apiver=v3&tt=1362316491978&class=regPhone&callback=bdcbsxs2rv5","Resource=0","RecContentType=text/html","Referer=/v2/?reg®Type=1&tpl=mn&u=http%3A%2F%2F%2F","Snapshot=t9.inf","Mode=HTML",EXTRARES,"Url=/cgi-bin/genimage?001362316472015690A3686612594D3D2C14ABF30D0B432CF4462DF3A4B5A8E5E7B7EE094DCAB428311C96E23B35A3CB73A67533699084E25A27CF6C9745497B5C5435611E0593A615CC284B27D70CA5FFB5F771E5D7DC9EE266F6FD61A2D88FEC7B7BA20EFF5DE2CD301E011E634D5063BDDCD35A47C1EB7B5EF365B347DD5800C612B744FAEF845540239F1036CC800902957BD17F36F6547B71C198C154162F8F71077B935E6B","Referer=/v2/?reg®Type=1&tpl=mn&u=http%3A%2F%2F%2F",ENDITEM,"Url=/img/bd-split.gif","Referer=/v2/?reg®Type=1&tpl=mn&u=http%3A%2F%2F%2F",ENDITEM,"Url=/img/reg_tip_header_t.gif","Referer=/v2/?reg®Type=1&tpl=mn&u=http%3A%2F%2F%2F",ENDITEM,"Url=/img/reg_tip_bg_bottom.gif","Referer=/v2/?reg®Type=1&tpl=mn&u=http%3A%2F%2F%2F",ENDITEM,LAST);trans_time=lr_get_transaction_wasted_time"注册");//获得消耗时间if(trans_time){lr_output_message"(Thedurationuptothesubmitis%fseconds",trans_time);//打印输出消耗实时间else{lr_output_message"(thedurationcannotbedetermined.");}lr_end_transaction"注册"，LR_AUTO);//事务结束return0;}脚本有点长，但不要被吓到了，重要的几句我已经加了注释。你只用关注那几行就行了。Ignorethinktime:忽视思考时间，也就说勾选这一项的时候，你脚本中加入的lr_think_time函数设置是无效的。选中这一项，运行上面的脚本。Action.c(62):Thedurationuptothesubmitis0.032043secondsAction.c(67):Notify:Transaction"注册"endedwith"Pass"status(Duration:12.4113WastedTime:0.0320).虽然我在脚本中加入了lr_think_time(20);这条语句，显现没起到任何作用。Replaythinktime：回放思考时间来看第一个选项：Asrecorded:取决于记录，选种这一项再来运行上面的脚本。Action.c(111):Thedurationuptothesubmitis0.034508secondsAction.c(116):Notify:Transaction"注册"endedwith"Pass"status(Duration:50.4453ThinkTime:20.0000WastedTime:0.0345).EndingactionAction.运行结果中多了一个ThinkTime:20.0000；这说明我们脚本中的lr_think_time(2O);起到了作用，选中这一项后，我们可以在脚本中任意的添加思考时间。Multiplyrecordedthinktimeby:录制思考时间乘以，使用录制思考时间的倍数。其实，在我们脚本录制的过程中，根据我们的操作，脚本中就可以生成相应的思考时间。这个参数是根据脚本中的思考时间进行调整的。例如：脚本是20秒，输入2,那么在脚本实际运行时，思考时间将为40秒；输入0.5，脚本在运行时的思考时间为10秒。下面选中此项，输入0.5，再来查看脚本运行结果：Action.c(111):Thedurationuptothesubmitis0.036610secondsAction.c(116):Notify:Transaction"注册"endedwith"Pass"status(Duration:131.2022ThinkTime:9.9998WastedTime:0.0366).注：将原谅脚本会有0.0002秒的误差。Userandompercentageofrecordedthinktime:使用录制思考时间的百分比。通过指定思考的时间的范围，可以设置思考时间值的范围。假如思考时间为20秒，这里设置的范围为50%到100%，那么脚本运行时候将随即的在这个范围(10秒到20秒之间)内取值。下面再来查看脚本运行时间：Action.c(111):Thedurationuptothesubmitis0.036191secondsAction.c(116):Notify: