修改参数
<p class="shortdesc">本文主要介绍如何修改RASESQL常规实例的部分参数。</p>
<section class="section prereq" id="Revise2__prereq_mpc_ych_gtb"><div class="tasklabel"><h2 class="doc-tairway">前提条件</h2></div>
<p class="p">您已成功创建常规实例,可参考<a class="xref" href="/ssr/help/database/RASESQL/User_Guide_for_RDS_PostgreSQL.Instance_Management.Create_Instance.Create_Common_Instance_MySQL" target="_blank" rel="external noopener">创建常规实例</a>。</p>
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<section class="section context"><div class="tasklabel"><h2 class="doc-tairway">背景信息</h2></div>
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<p class="p">您可以按需修改RASESQL引擎相关的高级参数,进行性能调优。</p>
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<p class="p">常规实例、灾备实例和只读实例均支持修改参数。</p>
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<p class="p">部分参数需要重启实例后才能生效。</p>
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<section class="section attention" id="Revise2__hsb_hbk_m5b"><div class="tasklabel"><h2 class="doc-tairway">注意事项</h2></div>
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<p class="p">修改常规实例的参数时,会同时修改同城和远程灾备实例的同一参数,且同城和远程灾备实例的该参数值与常规实例保持一致。</p>
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<p class="p">只读实例的参数可独立于常规实例进行修改,您可以在RASESQL管理控制台分别修改同城或远程只读实例的参数值,且同城或远程只读实例的同一参数值可以不同,与常规实例也可以不同。</p>
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<p class="p">修改需要重启实例的参数后,系统会自动重启常规实例、同城只读实例或远程只读实例。</p>
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<p class="p">重启实例的过程中,系统会发生秒级闪断。建议您在设置的<strong class="ph b">可维护时段</strong>内修改参数。</p>
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<section><div class="tasklabel"><h2 class="doc-tairway">操作步骤</h2></div><ol class="ol steps"><li class="li step stepexpand">
<span class="ph cmd"> 登录<a class="xref" href="https://www.ocftcloud.com/console/rds/instance" target="_blank" rel="external noopener">关系型数据库RASESQL管理控制台</a>。</span>
</li><li class="li step stepexpand">
<span class="ph cmd">单击左侧导航栏<strong class="ph b">RDS-RASESQL</strong>,进入<strong class="ph b">云数据库管理</strong>页面。</span>
</li><li class="li step stepexpand">
<span class="ph cmd">选择目标地域。</span>
</li><li class="li step stepexpand">
<span class="ph cmd">单击目标实例<strong class="ph b">操作</strong>列的<strong class="ph b">管理</strong>,选择<strong class="ph b">参数管理</strong>页签。</span>
</li><li class="li step stepexpand">
<span class="ph cmd">选择<strong class="ph b">参数列表</strong>,单击目标参数<strong class="ph b">操作</strong>列的<strong class="ph b">编辑参数</strong>,进入<strong class="ph b">编辑参数</strong>页面。</span>
</li><li class="li step stepexpand">
<span class="ph cmd">设置<strong class="ph b">参数值</strong>,单击<strong class="ph b">确定</strong>。</span>
</li><li class="li step stepexpand">
<span class="ph cmd">单击页面下方的<strong class="ph b">提交</strong>,在<strong class="ph b">提示</strong>页面单击<strong class="ph b">确定</strong>。</span>
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<div class="note note note_note" id="Revise2__note_izv_ndk_m5b"><span class="note__title">说明:</span>
<p class="p">若此时不希望提交修改后的参数值,可单击页面下方的<strong class="ph b">撤销</strong>,保持原来的取值不变。</p>
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<section class="section result" id="Revise2__result_edg_pdk_m5b"><div class="tasklabel"><h2 class="doc-tairway">执行结果</h2></div>
<p class="p">页面下方提示<strong class="ph b">操作成功</strong>, 在<strong class="ph b">参数列表</strong>页面,目标参数的<strong class="ph b">运行参数值</strong>为修改后的数值。</p>
<div class="note note note_note" id="Revise2__note_epl_qdk_m5b"><span class="note__title">说明:</span>
<p class="p">修改后目标参数<strong class="ph b">操作</strong>列的<strong class="ph b">编辑参数</strong>置灰,刷新后恢复为可编辑状态。</p>
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