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.MuiTreeItem-iconContainer{margin-right:4px;width:15px;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;}.css-khel7y .MuiTreeItem-iconContainer svg{font-size:18px;}.css-khel7y .MuiTreeItem-label{width:100%;min-width:0;padding-left:4px;position:relative;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;}</style><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><style data-emotion="css znl8a3">.css-znl8a3{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;min-height:1.75rem;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-left:0rem;padding-top:0.25rem;padding-bottom:0.25rem;}</style><div class="css-znl8a3"><style data-emotion="css tx8jsd">.css-tx8jsd{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;}</style><a class="MuiTypography-root MuiTypography-body1 css-tx8jsd" target="_blank" href="https://docs.pingcap.com/zh" style="text-decoration:none;width:100%;color:inherit"><style data-emotion="css 8atqhb">.css-8atqhb{width:100%;}</style><div class="MuiBox-root css-8atqhb"><style data-emotion="css 1hwyipb">.css-1hwyipb{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;color:inherit;font-size:0.875rem;line-height:1.25rem;}</style><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">文档中心</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-1" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">关于 TiDB</div></div><style data-emotion="css xjq79n">.css-xjq79n{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;fill:#999999;height:1rem;width:1rem;margin-left:auto;-webkit-transform:none;-moz-transform:none;-ms-transform:none;transform:none;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div><style data-emotion="css 1jozaee">.css-1jozaee{margin:0;padding:0;margin-left:17px;}</style></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-2" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">快速上手</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-3" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">应用开发</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-4" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">部署标准集群</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-5" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">数据迁移</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-6" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">数据集成</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-7" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">运维操作</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-8" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">监控与告警</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-9" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">故障诊断</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-10" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">性能调优</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-11" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">教程</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-12" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB 工具</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">参考指南</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-14" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">常见问题解答 (FAQ)</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="true" id="left-nav-treeview-0-15" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content Mui-expanded" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">版本发布历史</div></div><style data-emotion="css 171pefp">.css-171pefp{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;fill:#999999;height:1rem;width:1rem;margin-left:auto;-webkit-transform:rotate(90deg);-moz-transform:rotate(90deg);-ms-transform:rotate(90deg);transform:rotate(90deg);}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-171pefp" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div><style data-emotion="css 1xxsnna">.css-1xxsnna{height:auto;overflow:visible;-webkit-transition:height 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:height 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;margin:0;padding:0;margin-left:17px;}</style><ul class="MuiCollapse-root MuiCollapse-vertical MuiTreeItem-group MuiCollapse-entered css-1xxsnna" style="min-height:0px" role="group"><div class="MuiCollapse-wrapper MuiCollapse-vertical css-hboir5"><div class="MuiCollapse-wrapperInner MuiCollapse-vertical css-8atqhb"><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-0" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><style data-emotion="css kb2j4b">.css-kb2j4b{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;min-height:1.75rem;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-left:0.5rem;padding-top:0.25rem;padding-bottom:0.25rem;}</style><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/release-notes"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">发布版本汇总</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-1" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/release-timeline"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">版本发布时间线</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-2" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/versioning"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB 版本规则</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-3" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/binary-package"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB 离线包</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-15-4" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">v6.5</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-15-5" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">v6.4</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-15-6" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">v6.3</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-15-7" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">v6.2</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-15-8" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">v6.1</div></div><svg 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css-1hwyipb">5.0.4</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-14-3" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content Mui-expanded" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a aria-current="page" style="text-decoration:none;width:100%;color:inherit" class="" href="/zh/tidb/stable/release-5.0.3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">5.0.3</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-14-4" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a 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(min-width:1200px){.css-sb2sd0{max-width:calc(100% - 18.75rem);}}</style><main class="MuiBox-root css-sb2sd0"><style data-emotion="css 1rnnmjb">.css-1rnnmjb{max-width:1340px;width:100%;margin-left:auto;margin-right:auto;display:block;box-sizing:border-box;}</style><div class="MuiBox-root css-1rnnmjb"><style data-emotion="css 90fn5w">.css-90fn5w{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;}@media (min-width:0px){.css-90fn5w{-webkit-flex-direction:column-reverse;-ms-flex-direction:column-reverse;flex-direction:column-reverse;}}@media (min-width:600px){.css-90fn5w{-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;}}</style><div class="css-90fn5w"><style data-emotion="css vofosd">.css-vofosd{padding:1.5rem 0;}@media (min-width:0px){.css-vofosd{width:100%;}}@media (min-width:600px){.css-vofosd{width:calc(100% - 17.5rem);}}</style><div class="MuiBox-root css-vofosd"><style data-emotion="css 1ekb41w">.css-1ekb41w{width:100%;margin-left:auto;box-sizing:border-box;margin-right:auto;display:block;padding-left:16px;padding-right:16px;}@media (min-width:600px){.css-1ekb41w{padding-left:24px;padding-right:24px;}}@media (min-width:1536px){.css-1ekb41w{max-width:1536px;}}</style><div class="MuiContainer-root MuiContainer-maxWidthXl doc-content css-1ekb41w"><div class="markdown-body MuiBox-root css-0"><h1 id="tidb-503-release-notes" style="position:relative"><a href="#tidb-503-release-notes" aria-label="tidb 503 release notes permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>TiDB 5.0.3 Release Notes</h1><p>发版日期：2021 年 7 月 2 日</p><p>TiDB 版本：5.0.3</p><h2 id="兼容性更改" style="position:relative"><a href="#%E5%85%BC%E5%AE%B9%E6%80%A7%E6%9B%B4%E6%94%B9" aria-label="兼容性更改 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>兼容性更改</h2><ul><li><p>TiDB</p><ul><li>v4.0 集群升级到 v5.0 或更高版本（dev 和 v5.1）的集群后，<code>tidb_multi_statement_mode</code> 变量的默认值由 <code>WARN</code> 变为 <code>OFF</code></li><li>兼容 MySQL 5.7 的 noop 变量 <code>innodb_default_row_format</code>，配置此变量无实际效果 <a href="https://github.com/pingcap/tidb/issues/23541" target="_blank" referrerpolicy="no-referrer-when-downgrade">#23541</a></li></ul></li></ul><h2 id="功能增强" style="position:relative"><a href="#%E5%8A%9F%E8%83%BD%E5%A2%9E%E5%BC%BA" aria-label="功能增强 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>功能增强</h2><ul><li><p>Tools</p><ul><li><p>TiCDC</p><ul><li>增加 HTTP API 获取 TiCDC changefeed 信息和节点健康信息 <a href="https://github.com/pingcap/tiflow/pull/1955" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1955</a></li><li>为 kafka 下游增加 SASL/SCRAM 支持 <a href="https://github.com/pingcap/tiflow/pull/1942" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1942</a></li><li>使 TiCDC 在 server 级别支持 <code>--data-dir</code> 配置 <a href="https://github.com/pingcap/tiflow/pull/2070" target="_blank" referrerpolicy="no-referrer-when-downgrade">#2070</a></li></ul></li></ul></li></ul><h2 id="提升改进" style="position:relative"><a href="#%E6%8F%90%E5%8D%87%E6%94%B9%E8%BF%9B" aria-label="提升改进 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>提升改进</h2><ul><li><p>TiDB</p><ul><li>支持将 <code>TopN</code> 算子下推到 TiFlash <a href="https://github.com/pingcap/tidb/pull/25162" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25162</a></li><li>支持将内置函数 <code>json_unquote()</code> 下推到 TiKV <a href="https://github.com/pingcap/tidb/issues/24415" target="_blank" referrerpolicy="no-referrer-when-downgrade">#24415</a></li><li>支持在 Dual 表上移除 <code>Union</code> 算子的优化 <a href="https://github.com/pingcap/tidb/pull/25614" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25614</a></li><li>支持将内置函数 <code>replace()</code> 下推到 TiFlash <a href="https://github.com/pingcap/tidb/pull/25565" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25565</a></li><li>支持将内置函数 <code>unix_timestamp()</code>、<code>concat()</code>、<code>year()</code>、<code>day()</code>、<code>datediff()</code>、<code>datesub()</code>、<code>concat_ws()</code> 下推到 TiFlash <a href="https://github.com/pingcap/tidb/pull/25564" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25564</a></li><li>优化聚合算子的代价常数 <a href="https://github.com/pingcap/tidb/pull/25241" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25241</a></li><li>支持将 <code>Limit</code> 算子下推到 TiFlash <a href="https://github.com/pingcap/tidb/pull/25159" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25159</a></li><li>支持将内置函数 <code>str_to_date()</code> 下推到 TiFlash <a href="https://github.com/pingcap/tidb/pull/25148" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25148</a></li><li>允许 MPP outer join 根据表行数选择构建表 <a href="https://github.com/pingcap/tidb/pull/25142" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25142</a></li><li>支持将内置函数 <code>left()</code>、<code>right()</code>、<code>abs()</code> 下推到 TiFlash <a href="https://github.com/pingcap/tidb/pull/25133" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25133</a></li><li>支持将 Broadcast Cartesian Join 下推到 TiFlash <a href="https://github.com/pingcap/tidb/pull/25106" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25106</a></li><li>支持将 <code>Union All</code> 算子下推到 TiFlash <a href="https://github.com/pingcap/tidb/pull/25051" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25051</a></li><li>支持 MPP 查询任务按 Region 均衡到不同 TiFlash 节点上 <a href="https://github.com/pingcap/tidb/pull/24724" target="_blank" referrerpolicy="no-referrer-when-downgrade">#24724</a></li><li>支持执行 MPP 查询后将缓存中过时的 Region 无效化 <a href="https://github.com/pingcap/tidb/pull/24432" target="_blank" referrerpolicy="no-referrer-when-downgrade">#24432</a></li><li>提升内置函数 <code>str_to_date</code> 在格式指定器中 <code>%b/%M/%r/%T</code> 的 MySQL 兼容性 <a href="https://github.com/pingcap/tidb/pull/25767" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25767</a></li></ul></li><li><p>TiKV</p><ul><li>限制 TiCDC sink 的内存消耗 <a href="https://github.com/tikv/tikv/pull/10305" target="_blank" referrerpolicy="no-referrer-when-downgrade">#10305</a></li><li>为 TiCDC old value 缓存增加基于内存使用量的上限 <a href="https://github.com/tikv/tikv/pull/10313" target="_blank" referrerpolicy="no-referrer-when-downgrade">#10313</a></li></ul></li><li><p>PD</p><ul><li>将 TiDB Dashboard 升级至 v2021.06.15.1 <a href="https://github.com/pingcap/pd/pull/3798" target="_blank" referrerpolicy="no-referrer-when-downgrade">#3798</a></li></ul></li><li><p>TiFlash</p><ul><li>支持将 <code>STRING</code> 类型转换为 <code>DOUBLE</code> 类型</li><li>支持 <code>STR_TO_DATE()</code> 函数</li><li>通过多线程优化右外连接中的非连接数据</li><li>支持笛卡尔积 Join</li><li>支持 <code>LEFT()</code> 和 <code>RIGHT()</code> 函数</li><li>支持在 MPP 查询中自动清理过期的 Region 信息</li><li>支持 <code>ABS()</code> 函数</li></ul></li><li><p>Tools</p><ul><li><p>TiCDC</p><ul><li>优化 gRPC 的重连逻辑，提升 KV client 的吞吐 <a href="https://github.com/pingcap/tiflow/issues/1586" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1586</a> <a href="https://github.com/pingcap/tiflow/issues/1501#issuecomment-820027078" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1501</a> <a href="https://github.com/pingcap/tiflow/pull/1682" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1682</a> <a href="https://github.com/pingcap/tiflow/issues/1393" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1393</a> <a href="https://github.com/pingcap/tiflow/pull/1847" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1847</a> <a href="https://github.com/pingcap/tiflow/issues/1905" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1905</a> <a href="https://github.com/pingcap/tiflow/issues/1904" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1904</a></li><li>优化 sorter I/O 报错信息</li></ul></li></ul></li></ul><h2 id="bug-修复" style="position:relative"><a href="#bug-%E4%BF%AE%E5%A4%8D" aria-label="bug 修复 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Bug 修复</h2><ul><li><p>TiDB</p><ul><li>修复在 <code>SET</code> 类型列上 Merge Join 结果不正确的问题 <a href="https://github.com/pingcap/tidb/issues/25669" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25669</a></li><li>修复 <code>IN</code> 表达式参数的数据腐蚀问题 <a href="https://github.com/pingcap/tidb/issues/25591" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25591</a></li><li>避免 GC 的 session 受全局变量的影响 <a href="https://github.com/pingcap/tidb/issues/24976" target="_blank" referrerpolicy="no-referrer-when-downgrade">#24976</a></li><li>修复了在窗口函数查询中使用 <code>Limit</code> 时出现 panic 问题 <a href="https://github.com/pingcap/tidb/issues/25344" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25344</a></li><li>修复查询分区表时使用 <code>Limit</code> 返回错误值的问题 <a href="https://github.com/pingcap/tidb/issues/24636" target="_blank" referrerpolicy="no-referrer-when-downgrade">#24636</a></li><li>修复了 <code>IFNULL</code> 在 <code>ENUM</code> 或 <code>SET</code> 类型上不能正确生效的问题 <a href="https://github.com/pingcap/tidb/issues/24944" target="_blank" referrerpolicy="no-referrer-when-downgrade">#24944</a></li><li>修复了 Join 子查询中的 <code>count</code> 被改写为 <code>first_row</code> 导致结果不正确的问题 <a href="https://github.com/pingcap/tidb/issues/24865" target="_blank" referrerpolicy="no-referrer-when-downgrade">#24865</a></li><li>修复了 <code>TopN</code> 算子下使用 <code>ParallelApply</code> 查询时卡住的问题 <a href="https://github.com/pingcap/tidb/issues/24930" target="_blank" referrerpolicy="no-referrer-when-downgrade">#24930</a></li><li>修复了使用含有多列的前缀索引查询时出现多余结果的问题 <a href="https://github.com/pingcap/tidb/issues/24356" target="_blank" referrerpolicy="no-referrer-when-downgrade">#24356</a></li><li>修复了操作符 <code>&lt;=&gt;</code> 不能正确生效的问题 <a href="https://github.com/pingcap/tidb/issues/24477" target="_blank" referrerpolicy="no-referrer-when-downgrade">#24477</a></li><li>修复并行 <code>Apply</code> 算子的数据竞争问题 <a href="https://github.com/pingcap/tidb/issues/23280" target="_blank" referrerpolicy="no-referrer-when-downgrade">#23280</a></li><li>修复对 PartitionUnion 算子的 IndexMerge 结果排序时出现 <code>index out of range</code> 错误 <a href="https://github.com/pingcap/tidb/issues/23919" target="_blank" referrerpolicy="no-referrer-when-downgrade">#23919</a></li><li>修复 <code>tidb_snapshot</code> 被允许设置为非预期的过大值，而可能造成事务隔离性被破坏的问题 <a href="https://github.com/pingcap/tidb/issues/25680" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25680</a></li><li>修复 ODBC 类常数（例如 <code>{d '2020-01-01'}</code>）不能被用作表达式的问题 <a href="https://github.com/pingcap/tidb/issues/25531" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25531</a></li><li>修复 <code>SELECT DISTINCT</code> 被转化为 Batch Get 而导致结果不正确的问题 <a href="https://github.com/pingcap/tidb/issues/25320" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25320</a></li><li>修复无法触发将查询从 TiFlash 回退到 TiKV 的问题 <a href="https://github.com/pingcap/tidb/issues/23665" target="_blank" referrerpolicy="no-referrer-when-downgrade">#23665</a> <a href="https://github.com/pingcap/tidb/issues/24421" target="_blank" referrerpolicy="no-referrer-when-downgrade">#24421</a></li><li>修复在检查 <code>only_full_group_by</code> 时的 <code>index-out-of-range</code> 错误 <a href="https://github.com/pingcap/tidb/issues/23839" target="_blank" referrerpolicy="no-referrer-when-downgrade">#23839</a></li><li>修复关联子查询中 Index Join 的结果不正确问题 <a href="https://github.com/pingcap/tidb/issues/25799" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25799</a></li></ul></li><li><p>TiKV</p><ul><li>修复错误的 <code>tikv_raftstore_hibernated_peer_state</code> 监控指标 <a href="https://github.com/tikv/tikv/issues/10330" target="_blank" referrerpolicy="no-referrer-when-downgrade">#10330</a></li><li>修复 coprocessor 中 <code>json_unquote()</code> 函数错误的参数类型 <a href="https://github.com/tikv/tikv/issues/10176" target="_blank" referrerpolicy="no-referrer-when-downgrade">#10176</a></li><li>正常关机时跳过清理 Raftstore 的回调从而避免在某些情况下破坏事务的 ACID <a href="https://github.com/tikv/tikv/issues/10353" target="_blank" referrerpolicy="no-referrer-when-downgrade">#10353</a> <a href="https://github.com/tikv/tikv/issues/10307" target="_blank" referrerpolicy="no-referrer-when-downgrade">#10307</a></li><li>修复在 Leader 上 Replica Read 共享 Read Index 的问题 <a href="https://github.com/tikv/tikv/issues/10347" target="_blank" referrerpolicy="no-referrer-when-downgrade">#10347</a></li><li>修复 coprocessor 转换 <code>DOUBLE</code> 到 <code>DOUBLE</code> 的错误函数 <a href="https://github.com/pingcap/tidb/issues/25200" target="_blank" referrerpolicy="no-referrer-when-downgrade">#25200</a></li></ul></li><li><p>PD</p><ul><li>修复在 scheduler 启动之后，加载 TTL 配置产生的数据竞争问题 <a href="https://github.com/tikv/pd/issues/3771" target="_blank" referrerpolicy="no-referrer-when-downgrade">#3771</a></li><li>修复 <code>is_learner</code> 字段在 TiDB 的 <code>TIKV_REGION_PEERS</code> 表中显示异常的问题 <a href="https://github.com/tikv/pd/issues/3372" target="_blank" referrerpolicy="no-referrer-when-downgrade">#3372</a> <a href="https://github.com/pingcap/tidb/issues/24293" target="_blank" referrerpolicy="no-referrer-when-downgrade">#24293</a></li><li>修复在一个 zone 内所有 TiKV 节点下线或宕机的情况下，PD 不往其他 zone 调度数据的问题 <a href="https://github.com/tikv/pd/issues/3705" target="_blank" referrerpolicy="no-referrer-when-downgrade">#3705</a></li><li>修复在添加 scatter range 调度器后导致 PD 挂掉的问题 <a href="https://github.com/tikv/pd/pull/3762" target="_blank" referrerpolicy="no-referrer-when-downgrade">#3762</a></li></ul></li><li><p>TiFlash</p><ul><li>修复因 split 失败而不断重启的问题</li><li>修复无法删除 Delta 历史数据的潜在问题</li><li>修复在 <code>CAST</code> 函数中为非二进制字符串填充错误数据的问题</li><li>修复处理包含复杂 <code>GROUP BY</code> 列的聚合查询时结果不正确的问题</li><li>修复写入压力过大时出现进程崩溃的问题</li><li>修复右连接键不为空且左连接键可为空时进程崩溃的问题</li><li>修复 <code>read-index</code> 请求耗时长的潜在问题</li><li>修复读负载高的情况下进程崩溃的问题</li><li>修复 <code>Date_Format</code> 函数在参数类型为 <code>STRING</code> 且包含 <code>NULL</code> 值时可能导致 TiFlash server 崩溃的问题</li></ul></li><li><p>Tools</p><ul><li><p>TiCDC</p><ul><li>修复 TiCDC owner 在刷新 checkpoint 时异常退出的问题 <a href="https://github.com/pingcap/tiflow/issues/1902" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1902</a></li><li>修复写 MySQL 下游出错暂停时 MySQL 连接泄漏的问题 <a href="https://github.com/pingcap/tiflow/pull/1946" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1946</a></li><li>修复 TiCDC 读取 <code>/proc/meminfo</code> 失败时出现的 panic 问题 <a href="https://github.com/pingcap/tiflow/pull/2024" target="_blank" referrerpolicy="no-referrer-when-downgrade">#2024</a></li><li>减少 TiCDC 运行时的内存使用 <a href="https://github.com/pingcap/tiflow/pull/2012" target="_blank" referrerpolicy="no-referrer-when-downgrade">#2012</a> <a href="https://github.com/pingcap/tiflow/pull/1958" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1958</a></li><li>修复 resolved ts 计算慢导致 TiCDC panic 的问题 <a href="https://github.com/pingcap/tiflow/issues/1576" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1576</a></li><li>修复 processor 潜在的死锁问题 <a href="https://github.com/pingcap/tiflow/pull/2142" target="_blank" referrerpolicy="no-referrer-when-downgrade">#2142</a></li></ul></li><li><p>Backup &amp; Restore (BR)</p><ul><li>修复 BR 恢复中忽略了所有系统表的问题 <a href="https://github.com/pingcap/br/issues/1197" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1197</a> <a href="https://github.com/pingcap/br/issues/1201" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1201</a></li><li>修复在 Backup &amp; Restore 数据恢复期间开启 TDE 会报出文件已存在的错误 <a href="https://github.com/pingcap/br/issues/1179" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1179</a></li></ul></li><li><p>TiDB Lightning</p><ul><li>修复 TiDB Lightning 在特殊数据下 panic 的问题 <a href="https://github.com/pingcap/br/issues/1213" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1213</a></li><li>修复 TiDB Lightning 导入大文件拆分时遇到的 EOF 报错问题 <a href="https://github.com/pingcap/br/issues/1133" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1133</a></li><li>修复 TiDB Lightning 导入含 <code>auto_increment</code> 的 <code>DOUBLE</code> 或 <code>FLOAT</code> 类型列的表时生成极大 base 值的问题 <a href="https://github.com/pingcap/br/pull/1186" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1186</a></li><li>修复 TiDB Lightning 解析 Parquet 文件中 <code>DECIMAL</code> 类型数据失败的问题 <a href="https://github.com/pingcap/br/pull/1277" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1277</a></li></ul></li></ul></li></ul></div></div></div><style data-emotion="css 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