锘??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#x4E9A;&#x6D32;&#x56FD;&#x4EA7;&#x7CBE;&#x54C1;&#x53;&#x53;&#x53;&#x5728;&#x7EBF;&#x89C2;&#x770B;&#x41;&#x56;&#x2C;&#x4E9A;&#x6D32;&#x8272;&#x6210;&#x4EBA;&#x7F51;&#x7AD9;&#x57;&#x57;&#x57;&#x6C38;&#x4E45;&#x2C;&#x4E9A;&#x6D32;&#x6210;&#x4EBA;&#x56FD;&#x4EA7;&#x7CBE;&#x54C1;</title><link>http://www.tkk7.com/rox/category/14645.html</link><description /><language>zh-cn</language><lastBuildDate>Tue, 03 Jun 2008 07:25:27 GMT</lastBuildDate><pubDate>Tue, 03 Jun 2008 07:25:27 GMT</pubDate><ttl>60</ttl><item><title>寮�鍙戣�呰娉ㄦ剰oracle jdbc鐨剅esultSet.last()鏂規硶鐨勬晥鐜囬棶棰樸�愯漿杞姐�?/title><link>http://www.tkk7.com/rox/archive/2008/05/28/203431.html</link><dc:creator>rox</dc:creator><author>rox</author><pubDate>Wed, 28 May 2008 03:26:00 GMT</pubDate><guid>http://www.tkk7.com/rox/archive/2008/05/28/203431.html</guid><wfw:comment>http://www.tkk7.com/rox/comments/203431.html</wfw:comment><comments>http://www.tkk7.com/rox/archive/2008/05/28/203431.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/rox/comments/commentRss/203431.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/rox/services/trackbacks/203431.html</trackback:ping><description><![CDATA[<p><font style="color: #0000ff; background-color: #d4d0c8">鍚屼簨鍦ㄥ叕鍙歌鍧涢噷闈㈠彂鐨勶紝鍏跺疄鏄垜鎺ユ墜鐨勪竴涓」鐩腑瀛樺湪榪欎釜闂銆?br />
鍦ㄤ嬌鐢℉ibernate鍒嗛〉鍣ㄦ椂錛屼範鎯嬌鐢ㄧ洿鎺ユ妸鏌ヨ璇彞銆侀〉鏁般�佸垎欏靛ぇ灝忥紝浼犵粰鍒嗛〉鍣紝榪欐牱浼氶粯璁や嬌鐢╨ast鏉ヨ幏鍙栨�昏褰曟暟錛屾晥鐜囬潪甯哥殑浣庛�?br />
瑙ｅ喅鏂規硶錛屽緢綆�鍗曪紝灝辨槸鐢⊿QL鏉ount鏌ヨ鏉′歡鑾峰緱鎬昏褰曠殑Query錛屽啀緇橦ibernate鍒嗛〉鍣紙鏈韓灝卞啓濂戒簡鐨勶級銆?br />
榪欐牱灝卞繀欏誨鍐欏嚑琛屼唬鐮侊紝灝辨槸鍥犱負鑷繁鎳掞紝瑙夌潃鏁堟灉閮戒竴鏍鳳紝灝辯畝鍗曠殑鍐欎簡銆?br />
鏁版嵁閲忓ぇ浜嗕互鍚庯紝灝卞緢鏄庢樉鐨勯�熷害鎱笅鏉ヤ簡銆傚張鍏ㄩ儴閲嶅ご鏀硅繃錛屽緢鏄儊闂楓�?br />
杞澆姝ゆ枃錛屼互紺烘彁閱掞紒<br />
鍗充嬌鎳掑緱鐮旂┒Hibernate搴曞眰錛屼篃瑕佹敞鎰忓畠鐨勬晥鐜囬棶棰樸�?/font></p>
<p><font style="background-color: #d4d0c8"></font>&nbsp;</p>
<p><font style="background-color: #d4d0c8">&nbsp;</font></p>
<p><span style="font-size: 14pt">鎴戠湅鍒頒竴浜涜祫鏂欒繖鏍瘋錛宱racle鐨刯dbc椹卞姩鏄笉鏀寔鏈嶅姟鍣ㄧ鐨勬父鏍囩殑錛屽綋浣犺皟鐢╮esultSet.last()鏃訛紝jdbc椹卞姩紼嬪簭浼氭妸鏁翠釜緇撴灉闆嗙殑鏁版嵁璇誨埌鍐呭瓨錛岀劧鍚庡湪鍐呭瓨涓繘琛岀粨鏋滈泦鐨勯亶鍘嗐�?/span></p>
<p><span style="font-size: 14pt">濡傛灉鍦ㄥ仛鍒嗛〉鐨勬椂鍊欙紝鐢ㄨ繖鏍風殑鏂瑰紡鑾峰彇緇撴灉鐨勬�昏褰曟暟錛?br />
&nbsp; rs.last(); <br />
&nbsp; int rowcount = rs.getRow(); <br />
鍦ㄧ粨鏋滈泦寰堝ぇ鐨勬椂鍊欙紝榪欎釜鎬ц兘鏄浉褰撲綆涓嬬殑錛屽茍涓斾細鐢ㄦ帀寰堝鐨勫唴瀛樸�?/span></p>
<p><span style="font-size: 14pt">榪欎釜闂鏄槰澶╁湪媯�鏌ヤ漢鎵嶇綉鐨勪唬鐮佹椂鍙戠幇鐨勶紝闅忕潃鏁版嵁澧炲姞錛屽師鏉ヨ鎺╃洊鐨勯棶棰樻墠寮�濮嬫毚闇插嚭鏉ャ�傛垜浠敤jprofiler瀵圭▼搴忚繘琛屽墫鏋愮殑鎯呭喌涔熼棿鎺ョ殑璇佹槑浜嗕笂闈㈢殑璇存硶錛?) 榪炵畫鍑犳鍒鋒柊宸ヤ綔鍒楄〃鍚庯紝铏氭嫙鏈虹殑鍐呭瓨琚崰婊′簡錛岃繍琛屽瀮鍦懼洖鏀跺悗鍐呭瓨鍙堣閲婃斁鍑烘潵銆?) 浠庨〉闈㈣姹傚埌瀹屾垚鍝嶅簲錛宺esultSet.last()鏂規硶鐨勮皟鐢ㄥ崰鍘諱簡cpu鐨勭粷澶ч儴鍒嗘椂闂淬�?/span></p>
<p><span style="font-size: 14pt">鍥犱負涓婇潰鎻愬埌鐨勫垎欏墊柟娉曟槸涓�縐嶅父鐢ㄧ殑鏂規硶錛屾垜寤鴻澶у鑰冭檻涓�涓嬭嚜宸辯殑浠ｇ爜鏄惁瀛樺湪榪欐牱鐨勯棶棰橈紝榪欏鍔炲叕緋葷粺鐨勭ǔ瀹氳繍琛屽彲鑳芥槸寰堥噸瑕佺殑銆?/span></p>
<font style="background-color: #d4d0c8">
<p><br />
<span style="font-size: 14pt">鍙傝�冿細<br />
http://www.oracle.com/technology/global/cn/sample_code/tech/java/codesnippet/jdbc/rs/CountResult.html<br />
鎻愬埌浜嗭細<br />
濡傛灉 ResultSet 闈炲父澶э紝鍒?resultset.last() 鏈夊彲鑳芥槸闈炲父璐規椂鐨勬搷浣滐紝鍥犱負瀹冨皢浣跨敤鏈嶅姟鍣ㄧ鐨勬洿澶氳祫婧愩�傚洜姝わ紝闄ら潪紜疄闇�瑕佸彲婊氬姩緇撴灉闆嗭紝搴旈伩鍏嶄嬌鐢ㄨ繖縐嶆柟娉曘�?/span></p>
<p><span style="font-size: 14pt">http://forum.springframework.org/showthread.php?t=50044&amp;page=2<br />
鎻愬埌浜嗭細<br />
Anyway, if it's a normal behaviour of the oracle driver to keep data in memory when using SCROLLABLE resultset</span></p>
<p><span style="font-size: 14pt">http://xiongbo.javaeye.com/blog/38481<br />
瀵瑰嚑縐嶆父鏍囩被鍨嬪仛浜嗕粙緇嶏紝騫剁粰鍑轟簡寤鴻<br />
</span></font></p>
<img src ="http://www.tkk7.com/rox/aggbug/203431.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/rox/" target="_blank">rox</a> 2008-05-28 11:26 <a href="http://www.tkk7.com/rox/archive/2008/05/28/203431.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>Hibernate涓嶮ysql浣跨敤c3p0榪炴帴姹犳椂鐨勪竴鐐規敞鎰忋�?/title><link>http://www.tkk7.com/rox/archive/2006/02/14/30657.html</link><dc:creator>rox</dc:creator><author>rox</author><pubDate>Tue, 14 Feb 2006 11:43:00 GMT</pubDate><guid>http://www.tkk7.com/rox/archive/2006/02/14/30657.html</guid><wfw:comment>http://www.tkk7.com/rox/comments/30657.html</wfw:comment><comments>http://www.tkk7.com/rox/archive/2006/02/14/30657.html#Feedback</comments><slash:comments>2</slash:comments><wfw:commentRss>http://www.tkk7.com/rox/comments/commentRss/30657.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/rox/services/trackbacks/30657.html</trackback:ping><description><![CDATA[鏈�榪戠敤 Hibernate 3 榪炴帴 Mysql 4 鏁版嵁搴撱�?br />璋冭瘯鏃墮兘榪樺ソ錛岀湡姝ｅ彂甯冪殑鏃跺�欐瘺鐥呮潵浜嗐�?br />姣忓ぉ鏃╂櫒閮借閮戒細鎶ラ敊錛屼笉鑳芥甯告搷浣滄暟鎹簱銆?br />Mysql 閲嶅惎錛屾棤鏁堬紝Tomcat 閲嶅惎錛屾湁鏁堛�?br /><br />Mysql(MySQL 4.1) 鏂囨。 7.5.2 鑺?<br /><a >Tuning Server Parameters</a> 閲岄潰<br />鍦?Mysql鎺у埗鍙頒笅杈撳叆 SHOW VARIABLES; <br />鏈�鍚庝竴涓弬鏁?br />wait_timeout聽聽 聽28800<br />濡傛灉鍗曚綅鏄錛屼篃灝辨槸 8 涓皬鏃躲�?br />紼嬪簭鏈�鍚庝竴嬈″緩绔嬭繛鎺ュ畬姣曚箣鍚?8 涓皬鏃訛紝<br />Mysql 鍗曟柟闈㈠叧闂簡榪欎釜榪炴帴銆?br />浣?Hibernate 榪樺湪璁板繂鐫�榪欎釜榪炴帴鍩烘湰淇℃伅銆?br />紼嬪簭鍐嶆榪炴帴鐨勬椂鍊欙紝宸茬粡涓嶅瓨鍦ㄤ簡銆?br /><br />涓嶈繃錛孒ibernate 鍙互璁劇疆瀹冭嚜宸辯殑 timeout 銆?br />鍒頒簡 Hibernate 3 榛樿絎笁鏂圭殑榪炴帴姹犵鐞嗭紝<br />鐢?Apache 鐨?DBCP 欏圭洰鏇存崲鎴愪簡 <a >c3p0 欏圭洰</a>銆?a ></a><br />瀹冪殑灞炴�у湪 Hibernate 閰嶇疆灞炴�ф湁瀵瑰簲鐨勫啓娉曪紝濡傦細<br />c3p0.maxIdleTime = hibernate.c3p0.timeout<br />c3p0.maxPoolSize = hibernate.c3p0.max_size <br />鎵�浠ワ紝瑕佷慨鏀逛竴涓?hibernate.cfg.xml 鏂囨。<br />灝?Hibernate 榛樿榪炴帴姹犲弬鏁?br />&lt;property name="connection.pool_size"&gt;5&lt;/property&gt;<br />鍒犻櫎鎴栨敞閲婃帀錛孒ibernate 榛樿榪炴帴姹犳瘮杈冨垵綰с�?br />鐒跺悗錛屽姞鍏ヤ互涓嬪睘鎬?br />&lt;property name="hibernate.c3p0.timeout"&gt;1800&lt;/property&gt;<br />&lt;property name="hibernate.c3p0.max_size"&gt;5&lt;/property&gt;<br />灝卞彲浠ヤ嬌鐢?c3p0 鏉ョ鐞嗚繛鎺ユ睜浜嗐�?br />鍏跺疄榪欎簺灞炴�х殑鍙傛暟鍚嶉兘鍙互鍦?Hibernate 鏂囨。 3.3 鑺?br /><a >JDBC connections</a> 閲岄潰鎵懼埌銆?br />鎸夌収鐩稿簲鐨勬牸寮忔洿鏀瑰悕瀛楀拰鍊煎氨鍙互浜嗐�?br /><br /><img src ="http://www.tkk7.com/rox/aggbug/30657.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/rox/" target="_blank">rox</a> 2006-02-14 19:43 <a href="http://www.tkk7.com/rox/archive/2006/02/14/30657.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss>                                              <footer>
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