How do you fix the Microsoft Service "Diagnostic Policy Service" taking up about 4GB memory and about 1 cpu core at 100%?

Question

How do you fix the Microsoft "Diagnostic Policy Service" taking up about 4GB memory and about 1 cpu core at 100%?

I found out there is a process that keeps using up tons of CPU because my computer fans keep spinning up for heat. But the problem is that the cpu/memory usage wasn't always bad. And when you restart the process it SEEMS to go away for a while.

I used a python program psrecord to measure the cpu usage and memory usage of the process (and children) to find out that this process takes about 12 hours to get to maximum memory usage and it has lots of CPU usage:

The first graph is:

• x-axis time in seconds
• y-axis cpu usage in percent (100% is one full core)

The second graph is memory usage:

• x-axis is time in days
• y-axis is memory usage in MB

Answer 1

In a nutshell: You have to stop the process, delete the directory C:\Windows\System32\sru that is used by the process, start the process back up. Once I did this the service now uses about 20 MB memory and 0% CPU.

Here's a quick screenshot of the memory usage going down:

Long story:

• google'd "diagnostic policy service" site:reddit.com
• found a reddit thread https://www.reddit.com/r/pcgamingtechsupport/comments/a7wyrv/can_i_stop_diagnostic_policy_service/ talking about the "SRUDB.dat" file getting too big
• they pointed at a microsoft thread https://social.technet.microsoft.com/Forums/en-US/cf6ceadd-4bb4-4668-b8fb-8ccf7d067e31/diagnostic-policy-service-high-cpu?forum=win10itprogeneral
• inside of the microsoft thread they also talk about the SRUDB.dat file getting too big
• i went to my machine's C:\Windows\System32\sru directory
• there were 22,000 + files
• the SRUDB.dat was 4.5GB
• i tried to create a zip file of the directory but could not because it was open by the running process
• 我尝试使用 services.msc 手动停止服务，但进程自动重新启动
• 返回微软线程
• 有一个批处理脚本将服务设置为不自动启动（又名“手动”），然后终止该进程，这里是批处理*1
• 然后删除目录
• 然后再次启动服务
• 我查看了批处理脚本中的所有代码，然后以管理员权限运行批处理脚本

*1 这是脚本的低级步骤：

• 来电sc。将服务“DPS”设置为“需求”（又名“手动”）
• 调用sc以获取“DPS”进程 ID 号 (PID)
• 调用taskkill停止 PID
• 调用rd删除 src 目录
• 要求sc将“DPS”服务更改为“自动”
• 调用sc启动“DPS”服务