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path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#publish-mermaid-1786940978458-1 .rough-node .label text,#publish-mermaid-1786940978458-1 .node .label text,#publish-mermaid-1786940978458-1 .image-shape .label,#publish-mermaid-1786940978458-1 .icon-shape .label{text-anchor:middle;}#publish-mermaid-1786940978458-1 .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#publish-mermaid-1786940978458-1 .rough-node .label,#publish-mermaid-1786940978458-1 .node .label,#publish-mermaid-1786940978458-1 .image-shape .label,#publish-mermaid-1786940978458-1 .icon-shape .label{text-align:center;}#publish-mermaid-1786940978458-1 .node.clickable{cursor:pointer;}#publish-mermaid-1786940978458-1 .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#publish-mermaid-1786940978458-1 .arrowheadPath{fill:#333333;}#publish-mermaid-1786940978458-1 .edgePath .path{stroke:#333333;stroke-width:1px;}#publish-mermaid-1786940978458-1 .flowchart-link{stroke:#333333;fill:none;}#publish-mermaid-1786940978458-1 .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#publish-mermaid-1786940978458-1 .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#publish-mermaid-1786940978458-1 .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#publish-mermaid-1786940978458-1 .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#publish-mermaid-1786940978458-1 .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#publish-mermaid-1786940978458-1 .cluster text{fill:#333;}#publish-mermaid-1786940978458-1 .cluster span{color:#333;}#publish-mermaid-1786940978458-1 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#publish-mermaid-1786940978458-1 .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#publish-mermaid-1786940978458-1 rect.text{fill:none;stroke-width:0;}#publish-mermaid-1786940978458-1 .icon-shape,#publish-mermaid-1786940978458-1 .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#publish-mermaid-1786940978458-1 .icon-shape p,#publish-mermaid-1786940978458-1 .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#publish-mermaid-1786940978458-1 .icon-shape .label rect,#publish-mermaid-1786940978458-1 .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#publish-mermaid-1786940978458-1 .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#publish-mermaid-1786940978458-1 .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#publish-mermaid-1786940978458-1 .node .neo-node{stroke:#9370DB;}#publish-mermaid-1786940978458-1 [data-look=\\&#8221;neo\\&#8221;].node rect,#publish-mermaid-1786940978458-1 [data-look=\\&#8221;neo\\&#8221;].cluster rect,#publish-mermaid-1786940978458-1 [data-look=\\&#8221;neo\\&#8221;].node polygon{stroke:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978458-1 [data-look=\\&#8221;neo\\&#8221;].swimlane.cluster rect{filter:none;}#publish-mermaid-1786940978458-1 [data-look=\\&#8221;neo\\&#8221;].node path{stroke:#9370DB;stroke-width:1px;}#publish-mermaid-1786940978458-1 [data-look=\\&#8221;neo\\&#8221;].node .outer-path{filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978458-1 [data-look=\\&#8221;neo\\&#8221;].node .neo-line path{stroke:#9370DB;filter:none;}#publish-mermaid-1786940978458-1 [data-look=\\&#8221;neo\\&#8221;].node circle{stroke:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978458-1 [data-look=\\&#8221;neo\\&#8221;].node circle .state-start{fill:#000000;}#publish-mermaid-1786940978458-1 [data-look=\\&#8221;neo\\&#8221;].icon-shape .icon{fill:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978458-1 [data-look=\\&#8221;neo\\&#8221;].icon-shape .icon-neo path{stroke:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978458-1 :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}\u6210\u529f\u5931\u8d25<span class=\"nodeLabel\"><\/p>\n<p>\u6570\u636e\u5e93\u670d\u52a1\u5668\u542f\u52a8<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8bfb\u53d6 dm.ini \u914d\u7f6e\u6587\u4ef6<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u89e3\u6790\u7f51\u7edc\u76f8\u5173\u53c2\u6570<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u521b\u5efa\u76d1\u542c\u5957\u63a5\u5b57<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u7ed1\u5b9a IP \u5730\u5740\u4e0e\u7aef\u53e3<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u7ed1\u5b9a\u662f\u5426\u6210\u529f<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8c03\u7528 listen \u5f00\u59cb\u76d1\u542c<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8f93\u51fa\u9519\u8bef\u65e5\u5fd7<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u670d\u52a1\u5668\u542f\u52a8\u5931\u8d25<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u521b\u5efa DM \u76d1\u542c\u7ebf\u7a0b<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8fdb\u5165\u4e8b\u4ef6\u5faa\u73af<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5<\/p>\n<p><\/span><\/p>\n<h4>2.1.1 \u914d\u7f6e\u53c2\u6570\u52a0\u8f7d<\/h4>\n<\/p>\n<p>\u5728\u542f\u52a8\u9636\u6bb5&#xff0c;\u6570\u636e\u5e93\u4f1a\u4ece dm.ini \u914d\u7f6e\u6587\u4ef6\u4e2d\u52a0\u8f7d\u4e0e\u76d1\u542c\u76f8\u5173\u7684\u5173\u952e\u53c2\u6570&#xff1a;<\/p>\n<\/p>\n<p>| \u53c2\u6570\u540d | \u8bf4\u660e | \u9ed8\u8ba4\u503c |<\/p>\n<p>|&#8212;&#8212;&#8211;|&#8212;&#8212;|&#8212;&#8212;&#8211;|<\/p>\n<p>| PORT_NUM | \u76d1\u542c\u7aef\u53e3\u53f7 | 5236 |<\/p>\n<p>| LISTEN_IP | \u76d1\u542c IP \u5730\u5740 | 0.0.0.0 |<\/p>\n<p>| MAX_SESSIONS | \u6700\u5927\u4f1a\u8bdd\u6570 | 1000 |<\/p>\n<p>| SSL_HOSTNAME | SSL \u4e3b\u673a\u540d | \u65e0 |<\/p>\n<p>| ENABLE_ENCRYPT | \u662f\u5426\u542f\u7528\u52a0\u5bc6 | 0 |<\/p>\n<\/p>\n<h4>2.1.2 \u5957\u63a5\u5b57\u521b\u5efa\u4e0e\u7ed1\u5b9a<\/h4>\n<\/p>\n<p>DM \u76d1\u542c\u7ebf\u7a0b\u542f\u52a8\u65f6\u4f1a\u6267\u884c\u4ee5\u4e0b\u7cfb\u7edf\u8c03\u7528\u5e8f\u5217&#xff1a;<\/p>\n<\/p>\n<li>\u8c03\u7528 socket() \u521b\u5efa TCP \u5957\u63a5\u5b57<\/li>\n<li>\u8bbe\u7f6e SO_REUSEADDR \u9009\u9879&#xff0c;\u5141\u8bb8\u7aef\u53e3\u590d\u7528<\/li>\n<li>\u8c03\u7528 bind() \u5c06\u5957\u63a5\u5b57\u7ed1\u5b9a\u5230\u6307\u5b9a IP \u548c\u7aef\u53e3<\/li>\n<li>\u8c03\u7528 listen() \u5f00\u59cb\u76d1\u542c&#xff0c;\u8bbe\u7f6e\u7b49\u5f85\u961f\u5217\u957f\u5ea6<\/li>\n<li>\u6ce8\u518c\u5230 I\/O \u591a\u8def\u590d\u7528\u673a\u5236&#xff08;\u5982 epoll&#xff09;<\/li>\n<h3>2.2 DM \u76d1\u542c\u7ebf\u7a0b\u7684\u8fde\u63a5\u5904\u7406\u673a\u5236<\/h3>\n<\/p>\n<p>DM \u76d1\u542c\u7ebf\u7a0b\u91c7\u7528\u4e8b\u4ef6\u9a71\u52a8\u7684\u8fde\u63a5\u5904\u7406\u673a\u5236&#xff0c;\u6838\u5fc3\u6d41\u7a0b\u5982\u4e0b&#xff1a;<\/p>\n<\/p>\n<p>#publish-mermaid-1786940978760-2{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#publish-mermaid-1786940978760-2 .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#publish-mermaid-1786940978760-2 .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#publish-mermaid-1786940978760-2 .error-icon{fill:#552222;}#publish-mermaid-1786940978760-2 .error-text{fill:#552222;stroke:#552222;}#publish-mermaid-1786940978760-2 .edge-thickness-normal{stroke-width:1px;}#publish-mermaid-1786940978760-2 .edge-thickness-thick{stroke-width:3.5px;}#publish-mermaid-1786940978760-2 .edge-pattern-solid{stroke-dasharray:0;}#publish-mermaid-1786940978760-2 .edge-thickness-invisible{stroke-width:0;fill:none;}#publish-mermaid-1786940978760-2 .edge-pattern-dashed{stroke-dasharray:3;}#publish-mermaid-1786940978760-2 .edge-pattern-dotted{stroke-dasharray:2;}#publish-mermaid-1786940978760-2 .marker{fill:#333333;stroke:#333333;}#publish-mermaid-1786940978760-2 .marker.cross{stroke:#333333;}#publish-mermaid-1786940978760-2 svg{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;}#publish-mermaid-1786940978760-2 p{margin:0;}#publish-mermaid-1786940978760-2 .label{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;color:#333;}#publish-mermaid-1786940978760-2 .cluster-label text{fill:#333;}#publish-mermaid-1786940978760-2 .cluster-label span{color:#333;}#publish-mermaid-1786940978760-2 .cluster-label span p{background-color:transparent;}#publish-mermaid-1786940978760-2 .label text,#publish-mermaid-1786940978760-2 span{fill:#333;color:#333;}#publish-mermaid-1786940978760-2 .node rect,#publish-mermaid-1786940978760-2 .node circle,#publish-mermaid-1786940978760-2 .node ellipse,#publish-mermaid-1786940978760-2 .node polygon,#publish-mermaid-1786940978760-2 .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#publish-mermaid-1786940978760-2 .rough-node .label text,#publish-mermaid-1786940978760-2 .node .label text,#publish-mermaid-1786940978760-2 .image-shape .label,#publish-mermaid-1786940978760-2 .icon-shape .label{text-anchor:middle;}#publish-mermaid-1786940978760-2 .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#publish-mermaid-1786940978760-2 .rough-node .label,#publish-mermaid-1786940978760-2 .node .label,#publish-mermaid-1786940978760-2 .image-shape .label,#publish-mermaid-1786940978760-2 .icon-shape .label{text-align:center;}#publish-mermaid-1786940978760-2 .node.clickable{cursor:pointer;}#publish-mermaid-1786940978760-2 .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#publish-mermaid-1786940978760-2 .arrowheadPath{fill:#333333;}#publish-mermaid-1786940978760-2 .edgePath .path{stroke:#333333;stroke-width:1px;}#publish-mermaid-1786940978760-2 .flowchart-link{stroke:#333333;fill:none;}#publish-mermaid-1786940978760-2 .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#publish-mermaid-1786940978760-2 .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#publish-mermaid-1786940978760-2 .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#publish-mermaid-1786940978760-2 .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#publish-mermaid-1786940978760-2 .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#publish-mermaid-1786940978760-2 .cluster text{fill:#333;}#publish-mermaid-1786940978760-2 .cluster span{color:#333;}#publish-mermaid-1786940978760-2 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#publish-mermaid-1786940978760-2 .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#publish-mermaid-1786940978760-2 rect.text{fill:none;stroke-width:0;}#publish-mermaid-1786940978760-2 .icon-shape,#publish-mermaid-1786940978760-2 .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#publish-mermaid-1786940978760-2 .icon-shape p,#publish-mermaid-1786940978760-2 .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#publish-mermaid-1786940978760-2 .icon-shape .label rect,#publish-mermaid-1786940978760-2 .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#publish-mermaid-1786940978760-2 .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#publish-mermaid-1786940978760-2 .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#publish-mermaid-1786940978760-2 .node .neo-node{stroke:#9370DB;}#publish-mermaid-1786940978760-2 [data-look=\\&#8221;neo\\&#8221;].node rect,#publish-mermaid-1786940978760-2 [data-look=\\&#8221;neo\\&#8221;].cluster rect,#publish-mermaid-1786940978760-2 [data-look=\\&#8221;neo\\&#8221;].node polygon{stroke:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978760-2 [data-look=\\&#8221;neo\\&#8221;].swimlane.cluster rect{filter:none;}#publish-mermaid-1786940978760-2 [data-look=\\&#8221;neo\\&#8221;].node path{stroke:#9370DB;stroke-width:1px;}#publish-mermaid-1786940978760-2 [data-look=\\&#8221;neo\\&#8221;].node .outer-path{filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978760-2 [data-look=\\&#8221;neo\\&#8221;].node .neo-line path{stroke:#9370DB;filter:none;}#publish-mermaid-1786940978760-2 [data-look=\\&#8221;neo\\&#8221;].node circle{stroke:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978760-2 [data-look=\\&#8221;neo\\&#8221;].node circle .state-start{fill:#000000;}#publish-mermaid-1786940978760-2 [data-look=\\&#8221;neo\\&#8221;].icon-shape .icon{fill:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978760-2 [data-look=\\&#8221;neo\\&#8221;].icon-shape .icon-neo path{stroke:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978760-2 :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}\u662f\u5426\u6210\u529f\u5931\u8d25<span class=\"nodeLabel\"><\/p>\n<p>DM \u76d1\u542c\u7ebf\u7a0b\u8fd0\u884c\u4e2d<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>epoll_wait \u7b49\u5f85\u4e8b\u4ef6<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u662f\u5426\u6709\u65b0\u8fde\u63a5<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8c03\u7528 accept \u63a5\u6536\u8fde\u63a5<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u83b7\u53d6\u5ba2\u6237\u7aef\u5957\u63a5\u5b57 fd<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8bfb\u53d6\u8fde\u63a5\u63e1\u624b\u5305<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u89e3\u6790\u5ba2\u6237\u7aef\u534f\u8bae\u7248\u672c<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u6267\u884c\u8eab\u4efd\u8ba4\u8bc1<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8ba4\u8bc1\u662f\u5426\u6210\u529f<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5206\u914d\u4f1a\u8bdd ID<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u53d1\u9001\u9519\u8bef\u54cd\u5e94<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5173\u95ed\u5ba2\u6237\u7aef\u5957\u63a5\u5b57<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u521b\u5efa\u4f1a\u8bdd\u5bf9\u8c61<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5206\u6d3e\u7ed9\u5de5\u4f5c\u7ebf\u7a0b<\/p>\n<p><\/span><\/p>\n<h4>2.2.1 I\/O \u591a\u8def\u590d\u7528\u6a21\u578b<\/h4>\n<\/p>\n<p>DM \u76d1\u542c\u7ebf\u7a0b\u5728 Linux \u7cfb\u7edf\u4e0a\u9ed8\u8ba4\u4f7f\u7528 epoll \u4f5c\u4e3a I\/O \u591a\u8def\u590d\u7528\u673a\u5236&#xff0c;\u5177\u6709\u4ee5\u4e0b\u4f18\u52bf&#xff1a;<\/p>\n<\/p>\n<ul>\n<li>\u652f\u6301\u5927\u91cf\u5e76\u53d1\u8fde\u63a5&#xff08;C10K \u751a\u81f3\u66f4\u9ad8&#xff09;<\/li>\n<li>\u4e8b\u4ef6\u89e6\u53d1\u673a\u5236&#xff0c;\u65e0\u9700\u8f6e\u8be2<\/li>\n<li>O(1) \u65f6\u95f4\u590d\u6742\u5ea6\u7684\u4e8b\u4ef6\u901a\u77e5<\/li>\n<li>\u652f\u6301\u8fb9\u7f18\u89e6\u53d1\u4e0e\u6c34\u5e73\u89e6\u53d1\u4e24\u79cd\u6a21\u5f0f<\/li>\n<\/ul>\n<h4>2.2.2 \u8fde\u63a5\u63e1\u624b\u8fc7\u7a0b<\/h4>\n<\/p>\n<p>\u5f53 DM \u76d1\u542c\u7ebf\u7a0b\u63a5\u6536\u5230\u65b0\u8fde\u63a5\u540e&#xff0c;\u4f1a\u6267\u884c\u5b8c\u6574\u7684\u63e1\u624b\u534f\u8bae&#xff1a;<\/p>\n<\/p>\n<p>&#8212; \u67e5\u770b\u5f53\u524d\u8fde\u63a5\u4fe1\u606f<br \/>\nSELECT<br \/>\n    SESS_ID,<br \/>\n    SQL_TEXT,<br \/>\n    STATE,<br \/>\n    CREATE_TIME,<br \/>\n    CLNT_IP<br \/>\nFROM V$SESSIONS<br \/>\nWHERE STATE &#061; &#039;ACTIVE&#039;;<\/p>\n<p>\u4e0a\u8ff0 SQL \u53ef\u4ee5\u67e5\u770b\u5f53\u524d\u6d3b\u8dc3\u7684\u6570\u636e\u5e93\u4f1a\u8bdd\u4fe1\u606f&#xff0c;\u5305\u62ec\u4f1a\u8bdd ID\u3001\u5ba2\u6237\u7aef IP \u548c\u521b\u5efa\u65f6\u95f4\u7b49\u3002<\/p>\n<\/p>\n<h3>2.3 DM \u76d1\u542c\u7ebf\u7a0b\u4e0e\u4f1a\u8bdd\u7ba1\u7406<\/h3>\n<\/p>\n<p>DM \u76d1\u542c\u7ebf\u7a0b\u4e0e\u4f1a\u8bdd\u7ba1\u7406\u7d27\u5bc6\u5173\u8054&#xff0c;\u5176\u534f\u4f5c\u673a\u5236\u5982\u4e0b&#xff1a;<\/p>\n<\/p>\n<p>#publish-mermaid-1786940978843-3{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#publish-mermaid-1786940978843-3 .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#publish-mermaid-1786940978843-3 .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#publish-mermaid-1786940978843-3 .error-icon{fill:#552222;}#publish-mermaid-1786940978843-3 .error-text{fill:#552222;stroke:#552222;}#publish-mermaid-1786940978843-3 .edge-thickness-normal{stroke-width:1px;}#publish-mermaid-1786940978843-3 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p{background-color:transparent;}#publish-mermaid-1786940978843-3 .label text,#publish-mermaid-1786940978843-3 span{fill:#333;color:#333;}#publish-mermaid-1786940978843-3 .node rect,#publish-mermaid-1786940978843-3 .node circle,#publish-mermaid-1786940978843-3 .node ellipse,#publish-mermaid-1786940978843-3 .node polygon,#publish-mermaid-1786940978843-3 .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#publish-mermaid-1786940978843-3 .rough-node .label text,#publish-mermaid-1786940978843-3 .node .label text,#publish-mermaid-1786940978843-3 .image-shape .label,#publish-mermaid-1786940978843-3 .icon-shape .label{text-anchor:middle;}#publish-mermaid-1786940978843-3 .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#publish-mermaid-1786940978843-3 .rough-node .label,#publish-mermaid-1786940978843-3 .node .label,#publish-mermaid-1786940978843-3 .image-shape .label,#publish-mermaid-1786940978843-3 .icon-shape .label{text-align:center;}#publish-mermaid-1786940978843-3 .node.clickable{cursor:pointer;}#publish-mermaid-1786940978843-3 .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#publish-mermaid-1786940978843-3 .arrowheadPath{fill:#333333;}#publish-mermaid-1786940978843-3 .edgePath .path{stroke:#333333;stroke-width:1px;}#publish-mermaid-1786940978843-3 .flowchart-link{stroke:#333333;fill:none;}#publish-mermaid-1786940978843-3 .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#publish-mermaid-1786940978843-3 .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#publish-mermaid-1786940978843-3 .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#publish-mermaid-1786940978843-3 .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#publish-mermaid-1786940978843-3 .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#publish-mermaid-1786940978843-3 .cluster text{fill:#333;}#publish-mermaid-1786940978843-3 .cluster span{color:#333;}#publish-mermaid-1786940978843-3 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#publish-mermaid-1786940978843-3 .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#publish-mermaid-1786940978843-3 rect.text{fill:none;stroke-width:0;}#publish-mermaid-1786940978843-3 .icon-shape,#publish-mermaid-1786940978843-3 .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#publish-mermaid-1786940978843-3 .icon-shape p,#publish-mermaid-1786940978843-3 .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#publish-mermaid-1786940978843-3 .icon-shape .label rect,#publish-mermaid-1786940978843-3 .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#publish-mermaid-1786940978843-3 .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#publish-mermaid-1786940978843-3 .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#publish-mermaid-1786940978843-3 .node .neo-node{stroke:#9370DB;}#publish-mermaid-1786940978843-3 [data-look=\\&#8221;neo\\&#8221;].node rect,#publish-mermaid-1786940978843-3 [data-look=\\&#8221;neo\\&#8221;].cluster rect,#publish-mermaid-1786940978843-3 [data-look=\\&#8221;neo\\&#8221;].node polygon{stroke:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978843-3 [data-look=\\&#8221;neo\\&#8221;].swimlane.cluster rect{filter:none;}#publish-mermaid-1786940978843-3 [data-look=\\&#8221;neo\\&#8221;].node path{stroke:#9370DB;stroke-width:1px;}#publish-mermaid-1786940978843-3 [data-look=\\&#8221;neo\\&#8221;].node .outer-path{filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978843-3 [data-look=\\&#8221;neo\\&#8221;].node .neo-line path{stroke:#9370DB;filter:none;}#publish-mermaid-1786940978843-3 [data-look=\\&#8221;neo\\&#8221;].node circle{stroke:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978843-3 [data-look=\\&#8221;neo\\&#8221;].node circle .state-start{fill:#000000;}#publish-mermaid-1786940978843-3 [data-look=\\&#8221;neo\\&#8221;].icon-shape .icon{fill:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978843-3 [data-look=\\&#8221;neo\\&#8221;].icon-shape .icon-neo path{stroke:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978843-3 :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}\u6267\u884c\u5c42\u4f1a\u8bdd\u7ba1\u7406\u5c42\u76d1\u542c\u5c42\u521b\u5efa\u4f1a\u8bdd\u5206\u914d\u5206\u914d\u5206\u914d\u4f1a\u8bdd\u7ed3\u675f\u4f1a\u8bdd\u7ed3\u675f\u4f1a\u8bdd\u7ed3\u675f\u56de\u6536\u8d44\u6e90<span class=\"nodeLabel\"><\/p>\n<p>DM \u76d1\u542c\u7ebf\u7a0b<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u4f1a\u8bdd\u6c60<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u4f1a\u8bdd\u56de\u6536\u5668<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5de5\u4f5c\u7ebf\u7a0b 1<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5de5\u4f5c\u7ebf\u7a0b 2<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5de5\u4f5c\u7ebf\u7a0b N<\/p>\n<p><\/span><\/p>\n<h4>2.3.1 \u4f1a\u8bdd\u751f\u547d\u5468\u671f\u7ba1\u7406<\/h4>\n<\/p>\n<p>\u6bcf\u4e2a\u901a\u8fc7 DM \u76d1\u542c\u7ebf\u7a0b\u521b\u5efa\u7684\u4f1a\u8bdd\u90fd\u6709\u5b8c\u6574\u7684\u751f\u547d\u5468\u671f&#xff1a;<\/p>\n<\/p>\n<li>\u521b\u5efa\u9636\u6bb5&#xff1a;DM \u76d1\u542c\u7ebf\u7a0b\u5206\u914d\u4f1a\u8bdd ID \u548c\u5185\u5b58\u7ed3\u6784<\/li>\n<li>\u6d3b\u8dc3\u9636\u6bb5&#xff1a;\u5de5\u4f5c\u7ebf\u7a0b\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42<\/li>\n<li>\u7a7a\u95f2\u9636\u6bb5&#xff1a;\u4f1a\u8bdd\u4fdd\u6301\u8fde\u63a5\u4f46\u65e0\u6d3b\u8dc3\u8bf7\u6c42<\/li>\n<li>\u7ec8\u6b62\u9636\u6bb5&#xff1a;\u5ba2\u6237\u7aef\u65ad\u5f00\u6216\u8d85\u65f6&#xff0c;\u4f1a\u8bdd\u8d44\u6e90\u88ab\u56de\u6536<\/li>\n<h4>2.3.2 \u4f1a\u8bdd\u6c60\u673a\u5236<\/h4>\n<\/p>\n<p>\u8fbe\u68a6\u6570\u636e\u5e93\u91c7\u7528\u4f1a\u8bdd\u6c60\u673a\u5236\u63d0\u9ad8\u6027\u80fd&#xff0c;DM \u76d1\u542c\u7ebf\u7a0b\u521b\u5efa\u4f1a\u8bdd\u65f6\u4f1a\u4f18\u5148\u4ece\u4f1a\u8bdd\u6c60\u4e2d\u590d\u7528\u5df2\u6709\u7ed3\u6784&#xff1a;<\/p>\n<\/p>\n<p>&#8212; \u67e5\u770b\u4f1a\u8bdd\u6c60\u72b6\u6001<br \/>\nSELECT<br \/>\n    NAME,<br \/>\n    POOL_SIZE,<br \/>\n    USED_COUNT,<br \/>\n    FREE_COUNT<br \/>\nFROM V$POOL;<\/p>\n<h2>\u4e09\u3001DM \u76d1\u542c\u7ebf\u7a0b\u7684\u914d\u7f6e\u4e0e\u8c03\u4f18<\/h2>\n<\/p>\n<h3>3.1 DM \u76d1\u542c\u7ebf\u7a0b\u76f8\u5173\u53c2\u6570\u914d\u7f6e<\/h3>\n<\/p>\n<p>\u5408\u7406\u914d\u7f6e DM \u76d1\u542c\u7ebf\u7a0b\u76f8\u5173\u53c2\u6570\u5bf9\u6570\u636e\u5e93\u6027\u80fd\u81f3\u5173\u91cd\u8981&#xff0c;\u4ee5\u4e0b\u662f\u5173\u952e\u53c2\u6570\u8be6\u89e3&#xff1a;<\/p>\n<\/p>\n<h4>3.1.1 \u7f51\u7edc\u76d1\u542c\u53c2\u6570\u914d\u7f6e<\/h4>\n<\/p>\n<p>\u5728 dm.ini \u914d\u7f6e\u6587\u4ef6\u4e2d&#xff0c;\u4e0e DM \u76d1\u542c\u7ebf\u7a0b\u76f4\u63a5\u76f8\u5173\u7684\u53c2\u6570\u5982\u4e0b&#xff1a;<\/p>\n<\/p>\n<p># \u76d1\u542c\u7aef\u53e3\u53f7<br \/>\nPORT_NUM &#061; 5236<\/p>\n<p># \u76d1\u542c IP \u5730\u5740&#xff0c;0.0.0.0 \u8868\u793a\u76d1\u542c\u6240\u6709\u7f51\u5361<br \/>\nLISTEN_IP &#061; 0.0.0.0<\/p>\n<p># \u6700\u5927\u5e76\u53d1\u4f1a\u8bdd\u6570<br \/>\nMAX_SESSIONS &#061; 1000<\/p>\n<p># \u6700\u5927\u4f1a\u8bdd\u6570\u8fbe\u5230\u540e\u7684\u5904\u7406\u7b56\u7565<br \/>\nMAX_SESSION_POLICY &#061; 0<\/p>\n<p># \u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4&#xff08;\u79d2&#xff09;<br \/>\nSESSION_TIMEOUT &#061; 60<\/p>\n<p># TCP keepalive \u63a2\u6d4b\u95f4\u9694&#xff08;\u79d2&#xff09;<br \/>\nTCP_KEEPALIVE_INTERVAL &#061; 30<\/p>\n<h4>3.1.2 \u8fde\u63a5\u5b89\u5168\u53c2\u6570\u914d\u7f6e<\/h4>\n<\/p>\n<p># \u542f\u7528 SSL \u52a0\u5bc6<br \/>\nENABLE_ENCRYPT &#061; 1<\/p>\n<p># SSL \u8bc1\u4e66\u8def\u5f84<br \/>\nSSL_CERT_PATH &#061; \/dm8\/data\/ssl\/server.crt<\/p>\n<p># SSL \u79c1\u94a5\u8def\u5f84<br \/>\nSSL_KEY_PATH &#061; \/dm8\/data\/ssl\/server.key<\/p>\n<p># \u5141\u8bb8\u7684 IP \u5730\u5740\u5217\u8868<br \/>\nIP_CONTROL &#061; 1<br \/>\nIP_CONTROL_FILE &#061; \/dm8\/data\/ip_control.txt<\/p>\n<h4>3.1.3 \u53c2\u6570\u52a8\u6001\u4fee\u6539<\/h4>\n<\/p>\n<p>\u90e8\u5206\u53c2\u6570\u652f\u6301\u5728\u7ebf\u52a8\u6001\u4fee\u6539&#xff0c;\u65e0\u9700\u91cd\u542f\u6570\u636e\u5e93&#xff1a;<\/p>\n<\/p>\n<p>&#8212; \u52a8\u6001\u4fee\u6539\u6700\u5927\u4f1a\u8bdd\u6570<br \/>\nCALL SP_SET_PARA_VALUE(2, &#039;MAX_SESSIONS&#039;, 2000);<\/p>\n<p>&#8212; \u67e5\u770b\u53c2\u6570\u5f53\u524d\u503c<br \/>\nSELECT<br \/>\n    PARA_NAME,<br \/>\n    PARA_VALUE,<br \/>\n    READ_ONLY<br \/>\nFROM V$DM_INI<br \/>\nWHERE PARA_NAME IN (&#039;PORT_NUM&#039;, &#039;MAX_SESSIONS&#039;, &#039;SESSION_TIMEOUT&#039;);<\/p>\n<h3>3.2 DM \u76d1\u542c\u7ebf\u7a0b\u7684\u6027\u80fd\u76d1\u63a7<\/h3>\n<\/p>\n<h4>3.2.1 \u76d1\u63a7\u8fde\u63a5\u6570\u6307\u6807<\/h4>\n<\/p>\n<p>\u901a\u8fc7\u7cfb\u7edf\u89c6\u56fe\u76d1\u63a7 DM \u76d1\u542c\u7ebf\u7a0b\u7684\u8fd0\u884c\u72b6\u6001&#xff1a;<\/p>\n<\/p>\n<p>&#8212; \u67e5\u770b\u5f53\u524d\u8fde\u63a5\u6570\u7edf\u8ba1<br \/>\nSELECT<br \/>\n    COUNT(*) AS TOTAL_SESSIONS,<br \/>\n    SUM(CASE WHEN STATE &#061; &#039;ACTIVE&#039; THEN 1 ELSE 0 END) AS ACTIVE_SESSIONS,<br \/>\n    SUM(CASE WHEN STATE &#061; &#039;IDLE&#039; THEN 1 ELSE 0 END) AS IDLE_SESSIONS,<br \/>\n    COUNT(DISTINCT CLNT_IP) AS UNIQUE_IPS<br \/>\nFROM V$SESSIONS;<\/p>\n<h4>3.2.2 \u76d1\u63a7\u7ebf\u7a0b\u72b6\u6001<\/h4>\n<\/p>\n<p>&#8212; \u67e5\u770b DM \u76d1\u542c\u7ebf\u7a0b\u8fd0\u884c\u72b6\u6001<br \/>\nSELECT<br \/>\n    ID AS THREAD_ID,<br \/>\n    NAME AS THREAD_NAME,<br \/>\n    THREAD_DESC,<br \/>\n    CREATE_TIME<br \/>\nFROM V$THREADS<br \/>\nWHERE NAME LIKE &#039;%LISTEN%&#039;;<\/p>\n<h4>3.2.3 \u8fde\u63a5\u5386\u53f2\u8d8b\u52bf\u5206\u6790<\/h4>\n<\/p>\n<p>&#8212; \u67e5\u770b\u8fd1\u671f\u8fde\u63a5\u521b\u5efa\u60c5\u51b5<br \/>\nSELECT<br \/>\n    TO_CHAR(CREATE_TIME, &#039;YYYY-MM-DD HH24&#039;) AS HOUR,<br \/>\n    COUNT(*) AS CONN_COUNT,<br \/>\n    COUNT(DISTINCT CLNT_IP) AS UNIQUE_IPS<br \/>\nFROM V$SESSIONS<br \/>\nWHERE CREATE_TIME &gt;&#061; SYSDATE &#8211; 1<br \/>\nGROUP BY TO_CHAR(CREATE_TIME, &#039;YYYY-MM-DD HH24&#039;)<br \/>\nORDER BY HOUR DESC;<\/p>\n<h4>3.2.4 \u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u76d1\u63a7<\/h4>\n<\/p>\n<p>\u5728 Linux \u7cfb\u7edf\u4e2d&#xff0c;\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u76d1\u63a7 DM \u76d1\u542c\u7ebf\u7a0b\u7684\u7f51\u7edc\u8fde\u63a5\u72b6\u6001&#xff1a;<\/p>\n<\/p>\n<p># \u67e5\u770b\u6570\u636e\u5e93\u76d1\u542c\u7aef\u53e3\u8fde\u63a5\u72b6\u6001\u7edf\u8ba1<br \/>\nnetstat -an | grep 5236 | awk &#039;{print $6}&#039; | sort | uniq -c | sort -rn<\/p>\n<p># \u67e5\u770b\u76d1\u542c\u7ebf\u7a0b\u8fdb\u7a0b\u4fe1\u606f<br \/>\nps -ef | grep dmserver | grep -v grep<\/p>\n<p># \u4f7f\u7528 ss \u547d\u4ee4\u67e5\u770b\u76d1\u542c\u5957\u63a5\u5b57<br \/>\nss -tlnp | grep 5236<\/p>\n<h3>3.3 DM \u76d1\u542c\u7ebf\u7a0b\u7684\u5e38\u89c1\u95ee\u9898\u6392\u67e5<\/h3>\n<\/p>\n<h4>3.3.1 \u8fde\u63a5\u88ab\u62d2\u7edd\u95ee\u9898<\/h4>\n<\/p>\n<p>\u5f53\u5ba2\u6237\u7aef\u65e0\u6cd5\u8fde\u63a5\u6570\u636e\u5e93\u65f6&#xff0c;\u6392\u67e5\u6d41\u7a0b\u5982\u4e0b&#xff1a;<\/p>\n<\/p>\n<p>#publish-mermaid-1786940978904-4{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#publish-mermaid-1786940978904-4 .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#publish-mermaid-1786940978904-4 .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#publish-mermaid-1786940978904-4 .error-icon{fill:#552222;}#publish-mermaid-1786940978904-4 .error-text{fill:#552222;stroke:#552222;}#publish-mermaid-1786940978904-4 .edge-thickness-normal{stroke-width:1px;}#publish-mermaid-1786940978904-4 .edge-thickness-thick{stroke-width:3.5px;}#publish-mermaid-1786940978904-4 .edge-pattern-solid{stroke-dasharray:0;}#publish-mermaid-1786940978904-4 .edge-thickness-invisible{stroke-width:0;fill:none;}#publish-mermaid-1786940978904-4 .edge-pattern-dashed{stroke-dasharray:3;}#publish-mermaid-1786940978904-4 .edge-pattern-dotted{stroke-dasharray:2;}#publish-mermaid-1786940978904-4 .marker{fill:#333333;stroke:#333333;}#publish-mermaid-1786940978904-4 .marker.cross{stroke:#333333;}#publish-mermaid-1786940978904-4 svg{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;}#publish-mermaid-1786940978904-4 p{margin:0;}#publish-mermaid-1786940978904-4 .label{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;color:#333;}#publish-mermaid-1786940978904-4 .cluster-label text{fill:#333;}#publish-mermaid-1786940978904-4 .cluster-label span{color:#333;}#publish-mermaid-1786940978904-4 .cluster-label span p{background-color:transparent;}#publish-mermaid-1786940978904-4 .label text,#publish-mermaid-1786940978904-4 span{fill:#333;color:#333;}#publish-mermaid-1786940978904-4 .node rect,#publish-mermaid-1786940978904-4 .node circle,#publish-mermaid-1786940978904-4 .node ellipse,#publish-mermaid-1786940978904-4 .node polygon,#publish-mermaid-1786940978904-4 .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#publish-mermaid-1786940978904-4 .rough-node .label text,#publish-mermaid-1786940978904-4 .node .label text,#publish-mermaid-1786940978904-4 .image-shape .label,#publish-mermaid-1786940978904-4 .icon-shape .label{text-anchor:middle;}#publish-mermaid-1786940978904-4 .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#publish-mermaid-1786940978904-4 .rough-node .label,#publish-mermaid-1786940978904-4 .node .label,#publish-mermaid-1786940978904-4 .image-shape .label,#publish-mermaid-1786940978904-4 .icon-shape .label{text-align:center;}#publish-mermaid-1786940978904-4 .node.clickable{cursor:pointer;}#publish-mermaid-1786940978904-4 .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#publish-mermaid-1786940978904-4 .arrowheadPath{fill:#333333;}#publish-mermaid-1786940978904-4 .edgePath .path{stroke:#333333;stroke-width:1px;}#publish-mermaid-1786940978904-4 .flowchart-link{stroke:#333333;fill:none;}#publish-mermaid-1786940978904-4 .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#publish-mermaid-1786940978904-4 .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#publish-mermaid-1786940978904-4 .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#publish-mermaid-1786940978904-4 .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#publish-mermaid-1786940978904-4 .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#publish-mermaid-1786940978904-4 .cluster text{fill:#333;}#publish-mermaid-1786940978904-4 .cluster span{color:#333;}#publish-mermaid-1786940978904-4 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#publish-mermaid-1786940978904-4 .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#publish-mermaid-1786940978904-4 rect.text{fill:none;stroke-width:0;}#publish-mermaid-1786940978904-4 .icon-shape,#publish-mermaid-1786940978904-4 .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#publish-mermaid-1786940978904-4 .icon-shape p,#publish-mermaid-1786940978904-4 .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#publish-mermaid-1786940978904-4 .icon-shape .label rect,#publish-mermaid-1786940978904-4 .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#publish-mermaid-1786940978904-4 .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#publish-mermaid-1786940978904-4 .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#publish-mermaid-1786940978904-4 .node .neo-node{stroke:#9370DB;}#publish-mermaid-1786940978904-4 [data-look=\\&#8221;neo\\&#8221;].node rect,#publish-mermaid-1786940978904-4 [data-look=\\&#8221;neo\\&#8221;].cluster rect,#publish-mermaid-1786940978904-4 [data-look=\\&#8221;neo\\&#8221;].node polygon{stroke:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978904-4 [data-look=\\&#8221;neo\\&#8221;].swimlane.cluster rect{filter:none;}#publish-mermaid-1786940978904-4 [data-look=\\&#8221;neo\\&#8221;].node path{stroke:#9370DB;stroke-width:1px;}#publish-mermaid-1786940978904-4 [data-look=\\&#8221;neo\\&#8221;].node .outer-path{filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978904-4 [data-look=\\&#8221;neo\\&#8221;].node .neo-line path{stroke:#9370DB;filter:none;}#publish-mermaid-1786940978904-4 [data-look=\\&#8221;neo\\&#8221;].node circle{stroke:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978904-4 [data-look=\\&#8221;neo\\&#8221;].node circle .state-start{fill:#000000;}#publish-mermaid-1786940978904-4 [data-look=\\&#8221;neo\\&#8221;].icon-shape .icon{fill:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978904-4 [data-look=\\&#8221;neo\\&#8221;].icon-shape .icon-neo path{stroke:#9370DB;filter:drop-shadow(1px 2px 2px rgba(185, 185, 185, 1));}#publish-mermaid-1786940978904-4 :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}\u672a\u542f\u52a8\u5df2\u542f\u52a8\u672a\u76d1\u542c\u5df2\u76d1\u542c\u672a\u653e\u884c\u5df2\u653e\u884c\u88ab\u9650\u5236\u672a\u9650\u5236\u8fbe\u5230\u4e0a\u9650\u672a\u8fbe\u4e0a\u9650<span class=\"nodeLabel\"><\/p>\n<p>\u5ba2\u6237\u7aef\u8fde\u63a5\u5931\u8d25<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u6570\u636e\u5e93\u662f\u5426\u542f\u52a8<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u542f\u52a8\u6570\u636e\u5e93\u670d\u52a1<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u7aef\u53e3\u662f\u5426\u76d1\u542c<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u68c0\u67e5 dm.ini \u914d\u7f6e<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u9632\u706b\u5899\u662f\u5426\u653e\u884c<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u914d\u7f6e\u9632\u706b\u5899\u89c4\u5219<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>IP \u767d\u540d\u5355\u662f\u5426\u9650\u5236<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u6dfb\u52a0\u5ba2\u6237\u7aef IP \u5230\u767d\u540d\u5355<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u4f1a\u8bdd\u6570\u662f\u5426\u8fbe\u4e0a\u9650<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8c03\u6574 MAX_SESSIONS<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u68c0\u67e5\u8ba4\u8bc1\u65e5\u5fd7<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8054\u7cfb DBA \u8fdb\u4e00\u6b65\u6392\u67e5<\/p>\n<p><\/span><\/p>\n<h5>\u95ee\u9898\u6392\u67e5\u6b65\u9aa4&#xff1a;<\/h5>\n<\/p>\n<li>\u68c0\u67e5\u6570\u636e\u5e93\u670d\u52a1\u72b6\u6001&#xff1a;<\/li>\n<p># \u68c0\u67e5 dmserver \u8fdb\u7a0b<br \/>\nps -ef | grep dmserver<\/p>\n<p># \u68c0\u67e5\u7aef\u53e3\u76d1\u542c\u72b6\u6001<br \/>\nnetstat -tlnp | grep 5236<\/p>\n<li>\u68c0\u67e5\u9632\u706b\u5899\u914d\u7f6e&#xff1a;<\/li>\n<p># \u67e5\u770b iptables \u89c4\u5219<br \/>\niptables -L -n | grep 5236<\/p>\n<p># \u5f00\u653e\u7aef\u53e3<br \/>\nfirewall-cmd &#8211;add-port&#061;5236\/tcp &#8211;permanent<br \/>\nfirewall-cmd &#8211;reload<\/p>\n<li>\u68c0\u67e5 IP \u8bbf\u95ee\u63a7\u5236&#xff1a;<\/li>\n<p>&#8212; \u67e5\u770b IP \u63a7\u5236\u914d\u7f6e<br \/>\nSELECT * FROM V$DM_INI WHERE PARA_NAME &#061; &#039;IP_CONTROL&#039;;<\/p>\n<h4>3.3.2 \u8fde\u63a5\u6570\u8fc7\u9ad8\u95ee\u9898<\/h4>\n<\/p>\n<p>\u5f53\u6570\u636e\u5e93\u8fde\u63a5\u6570\u5f02\u5e38\u5347\u9ad8\u65f6&#xff0c;\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u6392\u67e5\u4e0e\u5904\u7406\u6b65\u9aa4&#xff1a;<\/p>\n<\/p>\n<p>&#8212; \u6b65\u9aa4 1&#xff1a;\u67e5\u770b\u8fde\u63a5\u6570\u6700\u9ad8\u7684\u5ba2\u6237\u7aef IP<br \/>\nSELECT<br \/>\n    CLNT_IP,<br \/>\n    COUNT(*) AS CONN_COUNT<br \/>\nFROM V$SESSIONS<br \/>\nGROUP BY CLNT_IP<br \/>\nORDER BY CONN_COUNT DESC<br \/>\nFETCH FIRST 10 ROWS ONLY;<\/p>\n<p>&#8212; \u6b65\u9aa4 2&#xff1a;\u67e5\u770b\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u4f1a\u8bdd<br \/>\nSELECT<br \/>\n    SESS_ID,<br \/>\n    CLNT_IP,<br \/>\n    SQL_TEXT,<br \/>\n    CREATE_TIME,<br \/>\n    LAST_RECV_TIME<br \/>\nFROM V$SESSIONS<br \/>\nWHERE STATE &#061; &#039;ACTIVE&#039;<br \/>\n  AND CREATE_TIME &lt; SYSDATE &#8211; 1\/24<br \/>\nORDER BY CREATE_TIME;<\/p>\n<p>&#8212; \u6b65\u9aa4 3&#xff1a;\u7ec8\u6b62\u5f02\u5e38\u4f1a\u8bdd<br \/>\nCALL SP_CLOSE_SESSION(\u4f1a\u8bddID);<\/p>\n<h4>3.3.3 \u76d1\u542c\u7ebf\u7a0b\u6027\u80fd\u4f18\u5316\u5efa\u8bae<\/h4>\n<\/p>\n<p>\u9488\u5bf9 DM \u76d1\u542c\u7ebf\u7a0b\u7684\u6027\u80fd\u4f18\u5316&#xff0c;\u5efa\u8bae\u4ece\u4ee5\u4e0b\u65b9\u9762\u5165\u624b&#xff1a;<\/p>\n<\/p>\n<li>\u5408\u7406\u8bbe\u7f6e MAX_SESSIONS \u53c2\u6570&#xff0c;\u907f\u514d\u8fc7\u5927\u5bfc\u81f4\u5185\u5b58\u538b\u529b<\/li>\n<li>\u542f\u7528\u8fde\u63a5\u6c60\u4e2d\u95f4\u4ef6&#xff0c;\u51cf\u5c11\u9891\u7e41\u5efa\u7acb\u8fde\u63a5\u7684\u5f00\u9500<\/li>\n<li>\u914d\u7f6e\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4&#xff0c;\u53ca\u65f6\u56de\u6536\u7a7a\u95f2\u4f1a\u8bdd<\/li>\n<li>\u542f\u7528 SSL \u52a0\u5bc6\u65f6\u6ce8\u610f CPU \u5f00\u9500&#xff0c;\u5fc5\u8981\u65f6\u4f7f\u7528\u786c\u4ef6\u52a0\u901f<\/li>\n<li>\u5b9a\u671f\u76d1\u63a7\u8fde\u63a5\u8d8b\u52bf&#xff0c;\u63d0\u524d\u8fdb\u884c\u5bb9\u91cf\u89c4\u5212<\/li>\n<li>\u914d\u7f6e IP \u767d\u540d\u5355&#xff0c;\u51cf\u5c11\u975e\u6cd5\u8fde\u63a5\u5c1d\u8bd5\u7684\u8d44\u6e90\u6d88\u8017<\/li>\n<p>&#8212; \u4f18\u5316\u540e\u7684\u53c2\u6570\u914d\u7f6e\u793a\u4f8b<br \/>\nCALL SP_SET_PARA_VALUE(2, &#039;MAX_SESSIONS&#039;, 1500);<br \/>\nCALL SP_SET_PARA_VALUE(2, &#039;SESSION_TIMEOUT&#039;, 120);<br \/>\nCALL SP_SET_PARA_VALUE(2, &#039;TCP_KEEPALIVE_INTERVAL&#039;, 60);<\/p>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u914d\u7f6e\u4e0e\u76d1\u63a7\u63aa\u65bd&#xff0c;\u53ef\u4ee5\u786e\u4fdd DM 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