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Group Policy made searchable

A free ADMX browser or comparison tool for IT administrators. Search policies, find registry keys, and see exactly what each setting writes to the Windows Registry. Or compare two GPO backups to see exactly what has changed between them.

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NTFS parallel flush worker threads

When flushing modified file data from memory, NTFS chooses to use one or more threads based on how many files are currently open. This setting gives control over how many threads will be used.

Making this value larger may decrease the time it takes to flush a volume but the flush may have a larger impact on other concurrent IO operations.

Values with special meaning:
0: Use the system calculated default
1: Disable parallel flush

The default value and limit for this setting varies based on the number of available processors on a given system:
- Default value calculation is: (([NumProcessors]/2) + 1)
- Default max value calculation is: ([NumProcessors]*2)

Registry Information

VendorMicrosoft
ProductFile Sys
CategoryFilesystem › NTFS
Applies toComputer Configuration
Supported onWindows 10 0
Registry Key[HKLM]SystemCurrentControlSetPolicies

Policy Settings

Open File Threshold:

Registry Key[HKLM]SystemCurrentControlSetPolicies
Value NameNtfsParallelFlushWorkers
TypeREG_DWORD
Min value0
Max value1024
Default5