为什么CSDN的博客比蜗牛还慢

2007-06-12 03:12:01 224 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

EXPLAIN解密：你的SQL为什么跑得像蜗牛？[特殊字符] 本文深入解析MySQL的EXPLAIN命令，帮助开发者诊断SQL查询性能瓶颈。通过分析执行计划中的关键指标如访问类型(type)、索引使用(key)、扫描行数(rows)等信息，揭示查询缓慢的根源。文章提供典型慢查询案例及优化方案，包括避免全表扫描、优化文件排序和临时表使用等，并介绍MySQL 8.0的EXPLAIN ANALYZE进阶功能。掌握这些技巧可显著提升SQL查询效率，是数据库性能优化的必备指南。阅读详情

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一阶电路基础知识一阶电路（First-order circuit）是指由一个电感（L）或一个电容（C）和一个电阻（R）组成的电路。根据电感或电容的位置，一阶电路可以分为RC电路、RL电路、LC电路、RLC电路。一阶电路常用于滤波、放大、时序控制等各种电子设备和系统中。通过调整电阻、电容或电感的数值，可以改变电路的频率响应、滞后/提前相位等特性，实现不同的功能和性能一阶、二阶电路区别一阶电路由一个电容或一个电感与一个电阻组成，而二阶电路则由两个电容或两个电感与一个电阻组成。阅读详情

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切换为时间正序

passstreet 2007-06-12

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唉。有人出来解释一下。。。。。。

denghan 2007-06-12

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严重同意。最近CSDN超慢啊。登录页打开经常使MYIE处于无呼应状态，过了几分钟才弹出一个“XX资源不可用..”
郁闷啊

CONLONG 2007-06-12

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同感！！！！！！！！

汗！！！！！！！！！！！！！！！！！！！！

aoyihuashao 2007-06-12

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Server Error in '/' Application.
--------------------------------------------------------------------------------

Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.

Source Error:

The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:

1. Add a "Debug=true" directive at the top of the file that generated the error. Example:

<%@ Page Language="C#" Debug="true" %>

or:

2) Add the following section to the configuration file of your application:

<configuration>
<system.web>
<compilation debug="true"/>
</system.web>
</configuration>

Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.

Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.

Stack Trace:

[InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.]
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +1184505
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105
System.Data.SqlClient.SqlConnection.Open() +111
Dottext.Framework.Data.SqlHelper.ExecuteReader(String connectionString, CommandType commandType, String commandText, SqlParameter[] commandParameters) in D:\CSDN Web Site\Csdn Blog\Src\Library\Data Providers\Dottext.SqlDataProvider\SQLHelper.cs:871
Dottext.Framework.Data.SqlDataProvider.GetPreferences(Int32 blogId) in D:\CSDN Web Site\Csdn Blog\Src\Library\Data Providers\Dottext.SqlDataProvider\SqlDataProvider.cs:3939
Dottext.Framework.Components.Preferences.Get(Int32 blogId) +111
EntryEditor..ctor() in D:\CSDN Web Site\Csdn Blog\Src\Web\writeblog_app.csdn.net\Controls\EntryEditor.ascx.cs:41
ASP.controls_entryeditor_ascx..ctor() +10
ASP.postedit_aspx.__BuildControlEntryEditor1() +23
ASP.postedit_aspx.__BuildControlContent1(Control __ctrl) +49
System.Web.UI.CompiledTemplateBuilder.InstantiateIn(Control container) +12
ASP.masterpager_master.__BuildControlContentPlaceHolder1() +110
ASP.masterpager_master.__BuildControlform1() +240
ASP.masterpager_master.__BuildControlTree(masterpager_master __ctrl) +102
ASP.masterpager_master.FrameworkInitialize() +34
System.Web.UI.UserControl.InitializeAsUserControlInternal() +31
System.Web.UI.MasterPage.CreateMaster(TemplateControl owner, HttpContext context, VirtualPath masterPageFile, IDictionary contentTemplateCollection) +1980880
System.Web.UI.Page.get_Master() +48
System.Web.UI.Page.ApplyMasterPage() +18
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint

为什么CSDN的博客比蜗牛还慢

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