.net 6 , sql sugar , sql server 2016 ,连接数超过200，提示以下错误，重启IIS里面的网站就正常了

[独孤薄荷]

SqlSugar.SqlSugarException: 中文提示 :  连接数据库过程中发生错误，检查服务器是否正常连接字符串是否正确，实在找不到原因请先Google错误信息：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..
English Message : Connection open error . 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.
   at SqlSugar.AdoProvider.GetDataReader(String sql, SugarParameter[] parameters)
   at SqlSugar.QueryableProvider`1.GetData[TResult](KeyValuePair`2 sqlObj)
   at SqlSugar.QueryableProvider`1._ToList[TResult]()
   at SqlSugar.QueryableProvider`1.ToList()
   at SqlSugar.QueryableProvider`1.Single()
   at SqlSugar.QueryableProvider`1.Single(Expression`1 expression)
   at lambda_method613(Closure , Object )
   at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.AwaitableObjectResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Logged|12_1(ControllerActionInvoker invoker)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextExceptionFilterAsync>g__Awaited|26_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)

[独孤薄荷]

@tigerleq 默认是关闭的，但是数据库有特性，有些链接会复用

[tigerleq]

执行了语句，要释放连接。尤其使用 Npgsql 这些 东西，在执行事务时，一定要管理好 链接的打开与关闭。

[独孤薄荷]

@tigerleq 怎么加壳的

[tigerleq]

一般访问数据的插件，我们都会 在中间加一个 壳，或者说加一个类统一管理 访问 数据，不会直接使用插件，否这后期 发现 ，插件问题，要切换插件，或者优化访问 数据库，你将会非常的痛苦

[独孤薄荷]

@吉普赛的歌 谢谢，是数据池满了

[吉普赛的歌]

查一下连接串的连接池配置吧