荣耀彩票代理

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MariaDB SQL里怎么通过Unix命令来提升速度

作者:whl  来源:网络整理  发布日期:2018-11-16 08:51:00

  ZUIJINXIAOBIANSHOUDAOSHENBIANPENGYOUDEFANKUISHUOSHIZAIMariaDB(MySQL)LIDUILIANJIEJINXINGCHAXUNDESHIHOUFAXIANQIXINGNENGZHENSHIYITAHUTU,RANGRENBURENZHISHI。XIAOBIANCHAZHAOLEZILIAOHOUFAXIANLEYIGETEBIEJIANDANDEBANFALAIJIEJUEZHEIGEMariaDB SQLSUDUMANDEWENTI,NEIJIUSHITONGGUOUnix MINGLINGLAIYUNXING,RANHOUNIHUIFAXIANCHAXUNDESHIHOUSUODUANLEQIMA30BEIYISHANG,SHIFENJINGREN。

荣耀彩票代理  XIAMIANJIUSHIZHEIGECHAXUN,TASHI GHTorrent FENXIDEYIBUFEN,WOSHIYONGLEGUANXIZAIXIANFENXICHULIKUANGJIA simple-rolap LAISHIXIANZHEIGEFENXI。

 simple-rolap

荣耀彩票代理  LIANGGELIANJIEZIDUANDOUYOUSUOYIN。BUGUO,MariaDB SHITONGGUODUI project_commits JINXINGQUANBIAOSAOMIAOHEDUI commits JINXINGSUOYINCHAZHAOLAISHIXIANLIANJIEDE。ZHEIKEYICONG EXPLAIN DESHUCHUKANCHULAI。

EXZ喎?http://chsp8.com/pro/pkqt/QTEFJTiC1xMrks/Y=" src="http://chsp8.com/uploadfile/2018/1115/20181115060938442.png" style="height: 124px; width: 368px" />

  ZHEILIANGGEBIAOZHONGDEJILUBIJIAODUO:project_commits YOU 50 YIXINGJILU,commits YOU 8.47 YIXINGJILU。FUWUQIDENEICUNBIJIAOXIAO,ZHIYOU 16GB。SUOYIHENKENENGSHIYINWEINEICUNFANGBUXIANEIMEDADESUOYIN,XUYAODUQUCIPAN,YINCIYANZHONGYINGXIANGDAOLEXINGNENG。CONG pmonitor DUILINSHIBIAODEFENXIJIEGUOLAIKAN,ZHEIGECHAXUNYIJINGYUNXINGBANTIANLE,HAIXUYAO 373 GEXIAOSHICAINENGYUNXINGWAN。

荣耀彩票代理  ZAIWOKANLAI,ZHEIGETAIGUOFENLE,YINWEIPAIXUHEBINGLIANJIE(sort-merge join)SUOXUDE I/O SHIJIANYINGGAIYAOBIYUJIDEZHIXINGSHIJIANYAODIYIGESHULIANGJI。WOZAI dba.stackexchange.com SHANGXUNQIUBANGZHU,YOURENJICHULEYIXIEJIANYIRANGWOCHANGSHI,DANWOMEIYOUXINXINTAMENNENGGOUJIEJUEWODEWENTI。WOCHANGSHILEDIYIGEJIANYI,JIEGUOBINGBULEGUAN。CHANGSHIMEIGEJIANYIDOUXUYAOZHISHAOBANTIANDESHIJIAN,HOULAI,WOJUEDINGCAIYONGYIZHONGWORENWEIKEYIYOUXIAOJIEJUEZHEIGEWENTIDEBANFA。

  WOJIANGZHEILIANGGEBIAODAOCHUDAOWENJIANZHONG,SHIYONG Unix DE join MINGLINGJIANGTAMENLIANJIEZAIYIQI,JIANGJIEGUOCHUANJI uniq,BAZHONGFUDEXINGYICHUDIAO,RANHOUJIANGJIEGUODAOHUIDAOSHUJUKU。DAORUGUOCHENG(BAOKUOZHONGJIANSUOYIN)CONG 20:41 KAISHI,DAODIERTIANDE 9:53 JIESHU。YIXIASHIJUTICAOZUOBUZHOU。

  1. JIANGSHUJUKUBIAODAOCHUWEIWENBENWENJIAN

  WOXIANDAOCHULIANJIELIANGGEBIAOXUYAOYONGDAODEZIDUAN,BINGANZHAOLIANJIEZIDUANJINXINGPAIXU。WEILEQUEBAOPAIXUSHUNXUYU Unix GONGJUDEPAIXUSHUNXUJIANRONG,WOJIANGZIDUANZHUANHUANWEIZIFULEIXING。

  WOJIANGYIXIA SQL CHAXUNDESHUCHUBAOCUNDAOWENJIAN commits_week.txt ZHONG。

 commits_week.txt

  RANHOUJIANGYIXIA SQL CHAXUNDESHUCHUBAOCUNDAO project_commits.txt WENJIANZHONG:

 project_commits.txt

  ZHEIYANGJIUSHENGCHENGLEYIXIALIANGGEWENJIAN。

  -rw-r–r– 1 dds dds 15G Aug 4 21:09 commits_week.txt

  -rw-r–r– 1 dds dds 93G Aug 5 00:36 project_commits.txt

  WEILEBIMIANNEICUNBUZU,WOSHIYONG –quick XUANXIANGLAIYUNXING mysql KEHUDUAN,FOUZEKEHUDUANHUIZAISHUCHUJIEGUOZHIQIANCHANGSHISHOUJISUOYOUDEJILU。

  2. SHIYONG Unix MINGLINGXINGGONGJUCHULIWENJIAN

荣耀彩票代理  JIEXIALAI,WOSHIYONG Unix DE join MINGLINGLAILIANJIEZHEILIANGGEWENBENWENJIAN。ZHEIGEMINGLINGXIANXINGSAOMIAOLIANGGEWENJIAN,BINGJIANGDIYIGEZIDUANXIANGTONGDEJILUZUHEZAIYIQI。YOUYUWENJIANZHONGDEJILUYIJINGPAIHAOXU,YINCIZHENGGEGUOCHENGWANCHENGDEHENKUAI,JIHUJIUSHI I/O DESUDU。WOHAIJIANGLIANJIEDEJIEGUOCHUANJI uniq,YONGYIXIAOCHUZHONGFUJILU,ZHEIJIUJIEJUELEYUANSHICHAXUNZHONGDE distinct WENTI。TONGYANG,ZAIYIJINGPAIHAOXUDESHUCHUJIEGUOSHANG,KEYITONGGUOJIANDANDEXIANXINGSAOMIAOWANCHENGQUZHONG。

荣耀彩票代理  ZHEISHIWOYUNXINGDE Unix MINGLING。

荣耀彩票代理  join commits_week.txt project_commits.txt | uniq >joined_commits.txt

  JINGGUOYIGEXIAOSHIDECHULI,WODEDAOLEXIANGYAODEJIEGUO。

  -rw-r–r– 1 dds dds 133G Aug 5 01:40 joined_commits.txt

  3. JIANGWENBENWENJIANDAOHUISHUJUKU

荣耀彩票代理  ZUIHOU,WOJIANGWENBENWENJIANDAOHUISHUJUKU。

文本文件导回数据库

  JIEYU

荣耀彩票代理  XIANGXINDUIMariaDB YOUSUOLEJIEDEPENGYOUdoZHIDAO,ZAILIXIANGZHUANGTAIXIA,TASHIKEYISHIXIANPAIXUHEBINGLIANJIEDE,ERQIEHAINENGZAIYUCEYUNXINGSHIJIANKENENGGUOZHANGDESHIHOUYOUHUAQIHUIYUNXINGRANGPAIXUHEBINGZIDONGLIANJIE。JINTIANJIDAJIAJIESHAODESHIYONGUnix MINGLINGLAITISHENGMariaDB SQLDESUDUDEJIESHAOJIUDAOZHEILILE,XIWANGNENGDUIYOUXUYAODEPENGYOUYOUSUOBANGZHU。

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