Replied on May 27, In reply to Maxi Polimeni's post on January 1, I have the same problem also now, it's been happening for about 3 months. My computer configuration except for automatic updates from MS hasn't changed in about 3 years. In Resource Monitor PID 4 System is constantly reading 's and 's of files, most of which are from my media directory which has literally 10's of thousands of files in nested directories which I think is not so relevant. Process explorer tells me nothing useful about the activity.
The query comes in various forms: Thus there isn't adequate network between the primary and the replica to transfer the huge log files being generated. As a first step, the question that customers want answered is: What is causing this churn inside the guest?
Isolate the high-churning processes Download the script from here: The script collects information about the writes done by various processes and writes log files with this data. I started the debugging process using the script on SQL Server virtual machine of my own.
I copied the script into the VM and ran it in an elevated PowerShell window. You might run into PowerShell script execution policy restrictions, and you might need to set the execution policy to Unrestricted http: At the same time, I was monitoring the VM using Perfmon from the host and checking to see if there is any burst of disk activity seen.
The blue line in the Perfmon graph is something I was not expecting to see, and it is significantly higher than the rest of the data — the scale for the blue line is 10X that of the red and green lines.
I was also monitoring the writes from within the guest using Perfmon… to see if there was any mismatch. As you can see from the screenshot below, the two performance monitors are rather in sync: At this point, I have no clue what in the guest is causing this sort of churn to show up.
Fortunately I have the script collecting data inside the guest that I will use for further analysis. Before starting the analysis, one additional bit of Excel manipulation that I added was to include a column called Hour-Minute: I use the following formula in the cell: Use the data to create a PivotTable and a PivotChart — this gives a summarized view of the writes happening.
What we see is that there is excessive data that gets written at 4: This is more than 30X of the data written otherwise. Use the data to create a PivotTable and PivotChart — and this should give us a per-process view of what is happening.
With the per-process information, we can easily plot the data written by each process and identify the culprit.
There is a burst of writes between 1: At this point, you should be able to differentiate between the following process classes using the process name and PID: Primary guest workload eg: SQL Server Windows inbox processes eg: Which files are being modified? Isolating the file sometimes helps in identifying the underlying operation.
Once you know which process is causing the churn and at approximately what time, we can use the inbox tool Resource Monitor resmon. We can filter to show the details of the processes that we want in the Resource Monitor. From the previous step you will get the details of the process causing the churn — for example, System PID 4.
Using the Resource Monitor you would find that the file being modified — for example, the file is identified as C: This would lead you to the conclusion that it is the pagefile that is being churned.Dec 12, · solved Fresh Win10 install or clone from HDD when old system frequently shows disk usage at %; solved Disk Usage at % at all times, task manager program system causing it; solved System compressed Memory causing Disk usage non stop.
solved Getting % disk usage when opening my corsair k70 driver . A ____ occurs when a limitation in a single computer system component slows down the entire system.
Disk ____ bottlenecks occur when Windows 7 and running applications want to read and write information to the physical disk in the system faster than the disk can manage.
dstat is a replacement for tools such as vmstat, iostat, netstat, or yunusemremert.com displays information about the system resources in real time. For example, you can compare disk usage in combination with interrupts from the IDE controller, or compare network bandwidth with the disk .
Jun 26, · In disk usage monitoring tab, under "System" process (PID=4), I've noticed that there was a large amount of reads and writes (several MB/s) on "yunusemremert.com" (which is the paging file itself.
Measuring disk activity: gstat dT: s w: s PID USERNAME VCSW IVCSW READ WRITE FAULT TOTAL PERCENT COMMAND mysql 0 % mysqld mysql 0 % mysqld Help! My system is slow!. May 06, · The System process (pid 4) on my dual core Vaio laptop is writing to disk appx. once every ms (at least that's how often the activity light blinks).
This is not performance impacting and I considered it just a minor annoyance until I recently installed a SSD.