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href="https://hitoli.com/2022/11/21/mysql%E6%95%B0%E6%8D%AE%E5%BA%93auto-increment%E8%87%AA%E5%A2%9E%E9%95%BF%E4%B8%8D%E5%8F%98%E7%9A%84%E5%A4%84%E7%90%86%E6%96%B9%E6%B3%95/"><span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"><meta itemprop="image" content="/images/avatar.jpg"><meta itemprop="name" content="Hito Li"><meta itemprop="description" content="天下事有难易乎？为之，则难者亦易矣, 天生我材必有用"></span><span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"><meta itemprop="name" content="涛声依旧"></span><div class="body md" itemprop="articleBody"><h4 id="问题描述"><a class="anchor" href="#问题描述">#</a> 问题描述</h4><p>今天无意中发现原本能正常增加的 id 突然不变了，查看 sql 发现是取的对应表的自增 id。虽然存到表中的新数据自增 id 变化了，但返回的 id 总是不变。经过查询发现表的自增 id 是存在 information_schema 库中的 tables 表中。tables 表中存储了所有表的对应信息，其中有个 auto_increment 字段存储的就是对应表的下一个自增值。但是 mysql 在新版本中修改了此值的更新规则，老版本中是实时更新，新版本修改为 24 小时更新一次。为了不修改原代码中的逻辑，只能通过修改 mysql 配置使项目正常工作了。</p><h4 id="解决办法"><a class="anchor" href="#解决办法">#</a> 解决办法</h4><p></p><figure class="highlight yaml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="string">mysql数据库auto_increment自增长不变的处理方法</span></span><br><span class="line"><span class="string">修改/etc/mysql/mysql.conf.d/mysqld.cnf</span></span><br><span class="line"><span class="string">增加一行information_schema_stats_expiry</span> <span class="string">=</span> <span class="number">0</span></span><br><span class="line"><span class="string">保存后重启mysql</span></span><br><span class="line"><span class="string">sudo</span> <span class="string">systemctl</span> <span class="string">restart</span> <span class="string">mysql.service</span></span><br><span class="line"></span><br><span class="line"><span class="string">查询是否生效</span></span><br><span class="line"><span class="string">show</span> <span class="string">global</span> <span class="string">variables</span> <span class="string">like</span> <span class="string">'information_schema_stats_expiry'</span><span class="string">;</span></span><br><span class="line"><span class="string">show</span> <span class="string">session</span> <span class="string">variables</span> <span class="string">like</span> <span class="string">'information_schema_stats_expiry'</span><span class="string">;</span></span><br></pre></td></tr></table></figure><p></p><div class="tags"><a href="/tags/mysql/" rel="tag"><i class="ic i-tag"></i> mysql</a></div></div><footer><div class="meta"><span class="item"><span class="icon"><i class="ic i-calendar-check"></i> </span><span class="text">更新于</span> <time title="修改时间：2022-11-21 14:49:07" itemprop="dateModified" datetime="2022-11-21T14:49:07+08:00">2022-11-21</time> </span><span id="2022/11/21/mysql数据库auto-increment自增长不变的处理方法/" class="item leancloud_visitors" data-flag-title="mysql 数据库 auto_increment 自增长不变的处理方法" title="阅读次数"><span class="icon"><i class="ic i-eye"></i> </span><span class="text">阅读次数</span> <span class="leancloud-visitors-count"></span> <span class="text">次</span></span></div><div class="reward"><button><i class="ic i-heartbeat"></i> 赞赏</button><p>请我喝[茶]~(￣▽￣)~*</p><div id="qr"><div><img data-src="/images/wechatpay.png" alt="Hito Li 微信支付"><p>微信支付</p></div><div><img data-src="/images/alipay.png" alt="Hito Li 支付宝"><p>支付宝</p></div></div></div><div id="copyright"><ul><li class="author"><strong>本文作者： </strong>Hito Li <i class="ic i-at"><em>@</em></i>涛声依旧</li><li class="link"><strong>本文链接：</strong> <a href="https://hitoli.com/2022/11/21/mysql%E6%95%B0%E6%8D%AE%E5%BA%93auto-increment%E8%87%AA%E5%A2%9E%E9%95%BF%E4%B8%8D%E5%8F%98%E7%9A%84%E5%A4%84%E7%90%86%E6%96%B9%E6%B3%95/" title="mysql 数据库 auto_increment 自增长不变的处理方法">https://hitoli.com/2022/11/21/mysql数据库auto-increment自增长不变的处理方法/</a></li><li class="license"><strong>版权声明： </strong>本站所有文章除特别声明外，均采用 <span class="exturl" data-url="aHR0cHM6Ly9jcmVhdGl2ZWNvbW1vbnMub3JnL2xpY2Vuc2VzL2J5LW5jLXNhLzQuMC9kZWVkLnpo"><i class="ic i-creative-commons"><em>(CC)</em></i>BY-NC-SA</span> 许可协议。转载请注明出处！</li></ul></div></footer></article></div><div class="post-nav"><div class="item left"><a href="/2022/11/13/%E6%95%B0%E6%8D%AE%E5%BA%93%E7%AE%A1%E7%90%86%E5%B7%A5%E5%85%B7/" itemprop="url" rel="prev" data-background-image="https://nas.hitoli.com:18014/images/2022/10/29/6833939bly1giclwuom7cj20zk0m8dvn.jpg" title="数据库管理工具"><span class="type">上一篇</span> <span class="category"><i class="ic i-flag"></i> 工具</span><h3>数据库管理工具</h3></a></div><div class="item right"><a href="/2022/11/24/KLineChart%E5%AE%9E%E7%8E%B0%E4%B8%80%E5%B9%85%E5%9B%BE%E4%B8%8A%E7%94%BB%E5%A4%9A%E4%B8%AA%E8%9C%A1%E7%83%9BK%E7%BA%BF/" itemprop="url" rel="next" 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