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<a class="post-title-link" href="/posts/26682/" itemprop="url">GORM之for(rows.Next)提前退出别忘了Close</a></h1>
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<p>近期一同事负责的线上模块，总是时不时的返回一下 504，检查发现，这个服务的内存使用异常的大，pprof分析后，发现有上万个goroutine，排查分析之后，是没有规范使用gorm包导致的，那么具体是什么原因呢，会不会也像 <a href="https://segmentfault.com/a/1190000020086816" target="_blank" rel="noopener">《Go Http包解析：为什么需要response.Body.Close()》</a> 文中一样，因为没有释放连接导致的呢？</p>
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<a class="post-title-link" href="/posts/43551/" itemprop="url">GORM之ErrRecordNotFound采坑记录</a></h1>
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<p>在我印象中有个错误的认知：如果GORM没有找到record，则会返回<code>ErrRecordNotFound</code> 的错误，知道上次业务中出现了bug，我才发现这个印象中的认知是错误的，且没有官方文档的支持。那么，<code>ErrRecordNotFound</code> 到底在什么时候返回呢，这篇文章将会根据源码来进行分析一下</p>
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<a class="post-title-link" href="/posts/4823/" itemprop="url">深入理解Go-map原理剖析</a></h1>
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<p>在使用map的过程中，有两个问题是经常会遇到的：读写冲突和遍历无序性。为什么会这样呢，底层是怎么实现的呢？带着这两个问题，我简单的了解了一下map的增删改查及遍历的实现。</p>
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<a class="post-title-link" href="/posts/29628/" itemprop="url">深入理解Go-sync.Map原理</a></h1>
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<blockquote>
<p> Map is like a Go map[interface{}]interface{} but is safe for concurrent use</p>
<p> by multiple goroutines without additional locking or coordination.</p>
<p> Loads, stores, and deletes run in amortized constant time.</p>
</blockquote>
<p>上面一段是官方对<code>sync.Map</code> 的描述，从描述中看，<code>sync.Map</code> 跟<code>map</code> 很像，<code>sync.Map</code> 的底层实现也是依靠了<code>map</code>，但是<code>sync.Map</code> 相对于 <code>map</code> 来说，是并发安全的。</p>
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