Posted java澶ф暟鎹慨鐐间箣閬?/a>

tags:

篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了相关的知识,希望对你有一定的参考价值。

姣忔櫄涔濈偣: 鎶€鏈共璐?馃憠 蹇呭畾濂変笂

鍝堝柦锛屽悇浣嶆柊鏉ョ殑灏忎紮浼翠滑锛屽ぇ瀹跺ソ锛佺敱浜庡叕浼楀彿鍋氫簡鏀圭増锛屼负浜嗕繚璇佸叕浼楀彿鐨勮祫婧愯兘鍑嗘椂鎺ㄩ€佸埌浣犳墜閲岋紝澶у璁板緱灏嗗挶浠殑鍏紬鍙?nbsp;鍔犳槦鏍囩疆椤?/span> 锛屽湪姝ょ湡璇氱殑琛ㄧず鎰熻阿

璋佸湪娑堣€梒pu?


鐢ㄦ埛+绯荤粺+IO绛夊緟+杞‖涓柇+绌洪棽

闈㈣瘯瀹橀棶鎴? 濡傛灉鏄?MySQL 寮曡捣鐨?CPU 娑堣€楄繃澶э紝浣犱細濡備綍浼樺寲锛?> 
</section> 
<section class= 闈㈣瘯瀹橀棶鎴? 濡傛灉鏄?MySQL 寮曡捣鐨?CPU 娑堣€楄繃澶э紝浣犱細濡備綍浼樺寲锛?> 
</section> 
<h2 data-tool=

绁搁鏄皝锛?/span>


鐢ㄦ埛


鐢ㄦ埛绌洪棿CPU娑堣€楋紝鍚勭閫昏緫杩愮畻

姝e湪杩涜澶ч噺tps

鍑芥暟/鎺掑簭/绫诲瀷杞寲/閫昏緫IO璁块棶鈥?/span>

鐢ㄦ埛绌洪棿娑堣€楀ぇ閲廲pu锛屼骇鐢熺殑绯荤粺璋冪敤鏄粈涔堬紵鍝簺鍑芥暟浣跨敤浜哻pu鍛ㄦ湡锛?/span>

IO绛夊緟


绛夊緟IO璇锋眰鐨勫畬鎴?/span>

姝ゆ椂CPU瀹為檯涓婄┖闂?/span>

濡倂mstat涓殑wa 寰堥珮銆備絾IO绛夊緟澧炲姞锛寃a涔熶笉涓€瀹氫細涓婂崌锛堣姹侷/O鍚庣瓑寰呭搷搴旓紝浣嗚繘绋嬩粠鏍镐笂绉诲紑浜嗭級

闈㈣瘯瀹橀棶鎴? 濡傛灉鏄?MySQL 寮曡捣鐨?CPU 娑堣€楄繃澶э紝浣犱細濡備綍浼樺寲锛?> 
</section> 
<section class= 闈㈣瘯瀹橀棶鎴? 濡傛灉鏄?MySQL 寮曡捣鐨?CPU 娑堣€楄繃澶э紝浣犱細濡備綍浼樺寲锛?> 
</section> 
<h3 data-tool=

浜х敓褰卞搷


鐢ㄦ埛鍜孖O绛夊緟娑堣€椾簡澶ч儴鍒哻pu

  • 鍚炲悙閲忎笅闄嶏紙tps锛?/span>

  • 鏌ヨ鍝嶅簲鏃堕棿澧炲姞


  • 鎱㈡煡璇㈡暟澧炲姞


  • 瀵筸ysql鐨勫苟鍙戦櫋澧烇紝涔熶細浜х敓涓婅瘔褰卞搷

鎴戞妸闈㈣瘯鐩稿叧鐨勫涔犺祫婧愭暣鐞嗗ソ浜?span>锛?/span>鎼滅储Java澶ф暟鎹慨鐐间箣閬撳叕浼楀彿锛屽洖澶嶁€淧DF鈥濓紝鍗冲彲鍏嶈垂鑾峰彇

闈㈣瘯瀹橀棶鎴? 濡傛灉鏄?MySQL 寮曡捣鐨?CPU 娑堣€楄繃澶э紝浣犱細濡備綍浼樺寲锛?> 
</section> 
<h2 data-tool=

濡備綍鍑忓皯CPU娑堣€楋紵


鍑忓皯绛夊緟


鍑忓皯IO閲?/span>

SQL/index锛屼娇鐢ㄥ悎閫傜殑绱㈠紩鍑忓皯鎵弿鐨勮鏁帮紙闇€骞宠 绱㈠紩鐨勬鏀剁泭鍜岀淮鎶ゅ紑閿€锛岀┖闂存崲鏃堕棿锛?/span>

鎻愬崌IO澶勭悊鑳藉姏

鍔燾ache/鍔犵鐩?SSD

闈㈣瘯瀹橀棶鎴? 濡傛灉鏄?MySQL 寮曡捣鐨?CPU 娑堣€楄繃澶э紝浣犱細濡備綍浼樺寲锛?> 
</section> 
<h3 data-tool=

鍑忓皯璁$畻


鍑忓皯閫昏緫杩愮畻閲?/span>

  • 閬垮厤浣跨敤鍑芥暟锛屽皢杩愮畻杞Щ鑷虫槗鎵╁睍鐨勫簲鐢ㄦ湇鍔″櫒涓?濡俿ubstr绛夊瓧绗﹁繍绠楋紝dateadd/datesub绛夋棩鏈熻繍绠楋紝abs绛夋暟瀛﹀嚱鏁?/span>


  • 鍑忓皯鎺掑簭锛屽埄鐢ㄧ储寮曞彇寰楁湁搴忔暟鎹垨閬垮厤涓嶅繀瑕佹帓搴?濡倁nion all浠f浛 union锛宱rder by 绱㈠紩瀛楁绛?/span>


  • 绂佹绫诲瀷杞崲锛屼娇鐢ㄥ悎閫傜被鍨嬪苟淇濊瘉浼犲叆鍙傛暟绫诲瀷涓庢暟鎹簱瀛楁绫诲瀷缁濆涓€鑷?濡傛暟瀛楃敤tiny/int/bigint绛夛紝蹇呴』杞崲鐨勫湪浼犲叆鏁版嵁搴撲箣鍓嶅湪搴旂敤涓浆濂?/span>


  • 绠€鍗曠被鍨嬶紝灏介噺閬垮厤澶嶆潅绫诲瀷锛岄檷浣庣敱浜庡鏉傜被鍨嬪甫鏉ョ殑闄勫姞杩愮畻銆傛洿灏忕殑鏁版嵁绫诲瀷鍗犵敤鏇村皯鐨勭鐩樸€佸唴瀛樸€乧pu缂撳瓨鍜宑pu鍛ㄦ湡

  • 鍦ㄦ湰鍏紬鍙峰洖澶嶁€淧DF鈥濓紝閫佷綘涓€浠?021鏈€鏂癑ava闈㈣瘯棰樺疂鍏?pdf


  • 鈥?

    闈㈣瘯瀹橀棶鎴? 濡傛灉鏄?MySQL 寮曡捣鐨?CPU 娑堣€楄繃澶э紝浣犱細濡備綍浼樺寲锛?> 
  </section></li> 
</ul> 
<section class=
    鍑忓皯閫昏緫IO閲?/span>

    • index锛屼紭鍖栫储寮曪紝鍑忓皯涓嶅繀瑕佺殑琛ㄦ壂鎻?濡傚鍔犵储寮曪紝璋冩暣缁勫悎绱㈠紩瀛楁椤哄簭锛屽幓闄ら€夋嫨鎬у緢宸殑绱㈠紩瀛楁绛夌瓑


    • table锛屽悎鐞嗘媶鍒嗭紝閫傚害鍐椾綑 濡傚皢寰堝皯浣跨敤鐨勫ぇ瀛楁鎷嗗垎鍒扮嫭绔嬭〃锛岄潪甯搁绻佺殑灏忓瓧娈靛啑浣欏埌鈥滃紩鐢ㄨ〃鈥?/span>


    • SQL锛岃皟鏁碨QL鍐欐硶锛屽厖鍒嗗埄鐢ㄧ幇鏈夌储寮曪紝閬垮厤涓嶅繀瑕佺殑鎵弿锛屾帓搴忓強鍏朵粬鎿嶄綔 濡傚噺灏戝鏉俲oin锛屽噺灏憃rder by锛屽敖閲弖nion all锛岄伩鍏嶅瓙鏌ヨ绛?/span>


    • 鏁版嵁绫诲瀷锛屽鐢ㄥ氨濂斤紝鍑忓皯涓嶅繀瑕佷娇鐢ㄥぇ瀛楁 濡倀inyint澶熺敤灏卞埆鎬绘槸int锛宨nt澶熺敤涔熷埆鑰乥igint锛宒ate澶熺敤涔熷埆鎬绘槸timestamp


    • 鈥?

    闈㈣瘯瀹橀棶鎴? 濡傛灉鏄?MySQL 寮曡捣鐨?CPU 娑堣€楄繃澶э紝浣犱細濡備綍浼樺寲锛?> 
</section> 
<section class=
    鍑忓皯query璇锋眰閲忥紙闈炴暟鎹簱鏈韩锛?/span>

    • 閫傚綋缂撳瓨锛岄檷浣庣紦瀛樻暟鎹矑搴︼紝瀵归潤鎬佸苟琚绻佽姹傜殑鏁版嵁杩涜閫傚綋鐨勭紦瀛?濡傜敤鎴蜂俊鎭紝鍟嗗搧淇℃伅绛?/span>


    • 浼樺寲瀹炵幇锛屽敖閲忓幓闄や笉蹇呰鐨勯噸澶嶈姹?濡傜姝㈠悓涓€椤甸潰澶氭閲嶅璇锋眰鐩稿悓鏁版嵁鐨勯棶棰橈紝閫氳繃璺ㄩ〉闈㈠弬鏁颁紶閫掑噺灏戣闂瓑


    • 鍚堢悊闇€姹傦紝璇勪及闇€姹備骇鍑烘瘮锛屽浜у嚭姣旀瀬绔簳涓嬬殑闇€姹傚悎鐞嗗幓闄?/span>


    • 鈥?

    鍗囩骇cpu鑻ョ粡杩囧噺灏戣绠楀拰鍑忓皯绛夊緟鍚庤繕涓嶈兘婊¤冻闇€姹傦紝cpu鍒╃敤鐜囪繕楂楾_T 鏄椂鍊欐嬁鍑烘渶鍚庣殑鏉€鎵嬮攺浜嗭紝鍗囩骇cpu锛屾槸閫夋嫨鏇村揩鐨刢pu杩樻槸鏇村鐨刢pu浜嗭紵

    • 浣庡欢杩燂紙蹇€熷搷搴旓級锛岄渶瑕佹洿蹇殑cpu锛堟瘡涓煡璇㈠彧鑳戒娇鐢ㄤ竴涓猚pu锛?/span>


    • 楂樺悶鍚愶紝鍚屾椂杩愯寰堝鏌ヨ璇彞锛岃兘浠庡涓猚pu澶勭悊鏌ヨ涓敹鐩?/span>


    闈㈣瘯瀹橀棶鎴? 濡傛灉鏄?MySQL 寮曡捣鐨?CPU 娑堣€楄繃澶э紝浣犱細濡備綍浼樺寲锛?> 
      </section> 
     </section> 
    </section> 
   </section> 
   <section mpa-paragraph-type=

    鎺?/span>鑽?/span>闃?/span>璇?/span>锛?/span>


    ~


    3銆?/span>






    6



    - END -
    鏈€杩戞暣鐞嗕竴浠借祫鏂?/span>銆婄▼搴忓憳瀛︿範鎵嬪唽銆?/span>锛岃鐩栦簡 Java鎶€鏈€侀潰璇曢绮鹃€夈€佹搷浣滅郴缁熷熀纭€鐭ヨ瘑銆佽绠楁満鍩虹鐭ヨ瘑銆丩inux鏁欑▼銆佽绠楁満缃戠粶绛夌瓑銆?/span>
    鑾峰彇鏂瑰紡锛氱偣鈥?nbsp;鍦ㄧ湅锛屽叧娉ㄥ叕浼楀彿 Java澶ф暟鎹慨鐐间箣閬?/strong> 骞跺洖澶?/span> PDF 棰嗗彇锛屾洿澶氬唴瀹归檰缁涓娿€?/span>

    闀挎寜璇嗗埆涓嬫柟浜岀淮鐮佸叧娉ㄥ悗鍥炲鍏抽敭瀛? PDF 棰嗗彇


    鍏虫敞 java澶ф暟鎹慨鐐间箣閬?/span>

        姣忓ぉ瀛︿範java鎶€鏈紝浣犳兂瀛︾殑Java鐭ヨ瘑杩欓噷閮芥湁!

    濡傛灉浣犺寰楁枃绔犱笉閿欙紝鏂囨湯鐨勮禐 馃憤 鍙堝洖鏉ュ暒锛? 璁板緱缁欐垜銆岀偣璧炪€嶅拰銆屽湪鐪嬨€嶅摝锝?/strong>

    以上是关于的主要内容,如果未能解决你的问题,请参考以下文章

    Python 操作Redis

    python爬虫入门----- 阿里巴巴供应商爬虫

    Python词典设置默认值小技巧

    《python学习手册(第4版)》pdf

    Django settings.py 的media路径设置

    Python中的赋值,浅拷贝和深拷贝的区别