Question

针对Win32_PageFileUsage类运行WMI查询会导致内存泄漏。在我的情况下，它每5分钟就完成200台服务器。大约3个小时后，内存泄漏几乎是10 GB。我认为它以某种方式与该事实相关，即页面文件不存在。值为“0”。这是我的代码：

...
ObjectQuery pageFileUsageQuery = 
        new ObjectQuery("SELECT AllocatedBaseSize, CurrentUsage FROM Win32_PageFileUsage");
m_PageFileUsageSearcher = new ManagementObjectSearcher(managementScope, pageFileUsageQuery);
...
var pageFileUsageCollection = m_PageFileUsageSearcher.Get();
double currentUsage = 0;
double maxSize = 0;

foreach (ManagementBaseObject managementBaseObject in pageFileUsageCollection)
{
        string result = managementBaseObject["CurrentUsage"].ToString();
        currentUsage += double.Parse(result);
}

系统是Windows Server 2008 SP2。也许有人有任何想法？

Answer 1

ManagementObjectSearcher实施IDisposable（ManagementObjectCollection和ManagementBaseObject也是如此）。你应该处理这些......或许有好的using陈述。

ObjectQuery pageFileUsageQuery = 
        new ObjectQuery("SELECT AllocatedBaseSize, CurrentUsage FROM Win32_PageFileUsage");
using(m_PageFileUsageSearcher = new ManagementObjectSearcher(managementScope, pageFileUsageQuery))
{
    ...
    using(var pageFileUsageCollection = m_PageFileUsageSearcher.Get())
    {
        double currentUsage = 0;
        double maxSize = 0;

        foreach (ManagementBaseObject managementBaseObject in pageFileUsageCollection)
        {
            try
            {
                string result = managementBaseObject["CurrentUsage"].ToString();
                currentUsage += double.Parse(result);
            }
            finally
            {
                managementBaseObject.Dispose();
            }
        }
    }
}

Answer 2

根据上面michael-graczyk的评论，“ ...”处理中存在一个错误。

只需调用 GC.WaitForPendingFinalizers（）即可解决

尽管我们并不真正认为它是一种解决方案，但这只是一种解决方法。

在Server 2008 SP2上运行WMI查询到Win32_PageFileUsage类时内存泄漏

2 个答案: