思考時間的理解處理

用戶訪問某個網(wǎng)站或軟件，一般不會不停地做個各種操作，例如一次查詢，用戶需要時間查看查詢的結(jié)果是否是自己想要的。例如一次訂單提交，用戶需要時間核對自己填寫的信息是否正確等。也就是說用戶在做某些操作時，是會有停留時間的，我把這個時間叫思考時間。但利用代碼去執(zhí)行的時候是沒有時間的，當然，腳本運行本身是需要時間的，但比起人的思考時間要小很多。這也是我們?yōu)槭裁匆密浖泶嫒说哪承┕ぷ鳌５袝r候，我們在做性能測試時，為了更真實的模擬用戶的操作，需要給代碼加入思考時間。來看看在loadrunner是如何設(shè)置思考時間的。打開loadrunner的VirtualUserGenerator菜單欄：Vuser---Run-Timesettings...,切換到TharkTime選項好吧！為了更好的理解這個界面上設(shè)置，現(xiàn)在我們通過一個腳本來分析。Action()(doubletrans_time;//定義變量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"注冊");//添加事務(wù)lr_think_time20);/設(shè)置思考時間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"注冊"，"Text=注冊","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"注冊");//獲得消耗時間if(trans_time){lr_output_message"(Thedurationuptothesubmitis%fseconds",trans_time);//打印輸出消耗實時間else{lr_output_message"(thedurationcannotbedetermined.");}lr_end_transaction"注冊"，LR_AUTO);//事務(wù)結(jié)束return0;}腳本有點長，但不要被嚇到了，重要的幾句我已經(jīng)加了注釋。你只用關(guān)注那幾行就行了。Ignorethinktime:忽視思考時間，也就說勾選這一項的時候，你腳本中加入的lr_think_time函數(shù)設(shè)置是無效的。選中這一項，運行上面的腳本。Action.c(62):Thedurationuptothesubmitis0.032043secondsAction.c(67):Notify:Transaction"注冊"endedwith"Pass"status(Duration:12.4113WastedTime:0.0320).雖然我在腳本中加入了lr_think_time(20);這條語句，顯現(xiàn)沒起到任何作用。Replaythinktime：回放思考時間來看第一個選項：Asrecorded:取決于記錄，選種這一項再來運行上面的腳本。Action.c(111):Thedurationuptothesubmitis0.034508secondsAction.c(116):Notify:Transaction"注冊"endedwith"Pass"status(Duration:50.4453ThinkTime:20.0000WastedTime:0.0345).EndingactionAction.運行結(jié)果中多了一個ThinkTime:20.0000；這說明我們腳本中的lr_think_time(2O);起到了作用，選中這一項后，我們可以在腳本中任意的添加思考時間。Multiplyrecordedthinktimeby:錄制思考時間乘以，使用錄制思考時間的倍數(shù)。其實，在我們腳本錄制的過程中，根據(jù)我們的操作，腳本中就可以生成相應(yīng)的思考時間。這個參數(shù)是根據(jù)腳本中的思考時間進行調(diào)整的。例如：腳本是20秒，輸入2,那么在腳本實際運行時，思考時間將為40秒；輸入0.5，腳本在運行時的思考時間為10秒。下面選中此項，輸入0.5，再來查看腳本運行結(jié)果：Action.c(111):Thedurationuptothesubmitis0.036610secondsAction.c(116):Notify:Transaction"注冊"endedwith"Pass"status(Duration:131.2022ThinkTime:9.9998WastedTime:0.0366).注：將原諒腳本會有0.0002秒的誤差。Userandompercentageofrecordedthinktime:使用錄制思考時間的百分比。通過指定思考的時間的范圍，可以設(shè)置思考時間值的范圍。假如思考時間為20秒，這里設(shè)置的范圍為50%到100%，那么腳本運行時候?qū)㈦S即的在這個范圍(10秒到20秒之間)內(nèi)取值。下面再來查看腳本運行時間：Action.c(111):Thedurationuptothesubmitis0.036191secondsAction.c(116):Notify: