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What is sqlwriter.exe?

Part of Microsoft SQL Server by Microsoft

What is it?

The SQL Writer Service provides added functionality for backup and restore of SQL Server through the Volume Shadow Copy Service framework.
Description of sqlwriter.exe from Microsoft
The SQL Writer Service is installed automatically. It must be running when the Volume Shadow Copy Service (VSS) application requests a backup or restore. To configure the service, use the Microsoft Windows Services applet. The SQL Writer Service installs on all operating systems. When running, Database Engine locks and has exclusive access to the data files. When the SQL Writer Service is not running, backup programs running in Windows do not have access to the data files, and backups must be performed using SQL Server backup.
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How does sqlwriter.exe run?

Service - sqlwriter.exe runs as a background Windows service called 'WIDWriter' (Windows Internal Database VSS Writer). This service runs as the SYSTEM account with extensive privileges on the local computer, and acts as the computer on the network. Windows Internal Database VSS Writer runs as a program that can be started by the Service Controller and that obeys the service control protocol. This type of service runs in a process by itself.


What is the community is seeing?What is the community is doing?
About 0.3% of all Boost users have the sqlwriter.exe process running.Of the 0.3% of sqlwriter.exe users, 16.7% have disabled it.
How resource intensive is sqlwriter.exe?
Comparison based on the average resource utilization across all programs.
0.00000% CPU30.7%
Average CPU utilization across all programs is 0.00001%.
     1.81 MB RAM8.4%
Average private memory utilization across all programs is 21.53 MB.
 2 /min0.1%
Average I/O read and write operations for all programs is 2,253 per minute.
Typical file (disk image) location:
C:\Program Files\microsoft sql server\90\shared\sqlwriter.exe

Are there other versions of Microsoft SQL Server?

What else is related?

What Windows OS versions does this run on?

Windows 7 Enterprise (6.1.7600.0)
Windows 8 Pro with Media Center (6.2.9200.0)

About Microsoft Corporation

Microsoft, founded in 1975 by Bill Gates and Paul Allen, is a veteran software company, best known for its Microsoft Windows operating system and the Microsoft More...
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File details

File name: sqlwriter.exe
Publisher: Microsoft Corporation (verified)
Name: Microsoft SQL Server
Description: SQL Server VSS Writer - 64 Bit
Version: 2005.090.4035.00
Product version: 9.00.4035.00
Size: 150.34 KB
Original file name: SQLWRITER.EXE

Digital certificate

Certificate authority: Microsoft Corporation
Expiration date: 3/8/2011

Resource utilization

CPU utilization averages
Total CPU: 0.0000103853%
Privileged CPU: 0.0000073128%
User CPU: 0.00000307256437%
Privileged CPU time: 23.41 ms
Privileged CPU time /min: 0 ms
CPU cycle count: 90,047,006
CPU cycle count /min: 133,328
Memory utilization averages
Committed memory: 39.89 MB
Peak committed memory: 47.9 MB
Paged memory: 1.81 MB
Peak paged memory: 2.21 MB
Paged system memory: 69.73 KB
Non-paged system memory: 8.44 KB
Working set memory: 3.73 MB
Peak working set memory: 6.21 MB
Min working set memory: 3.39 MB
Private memory: 1.81 MB
Page faults: 1,840
Page faults /min: 2
Process I/O averages
Total read operations: 1
Read operations /min: 1
Total read transfer: 116 Bytes
Read transfer /min: 0 Bytes
Total write operations: 1
Write operations /min: 1
Total write transfer: 160 Bytes
Write transfer /min: 0 Bytes
Total other operations: 364
Other operations /min: 1
Total other transfer: 4.24 KB
Other Transfer /min: 10 Bytes
Handle count average: 81
Thread count average: 4
Thread resource averages

Process details

Runs as (owner): System
Integrety level: System
Windows platform: 64-bit
Runs as a service: Yes
Parent Processes
Process Command
"C:\Program Files\Microsoft SQL Server\90\Shared\sqlwriter.exe"

Service details

Name: Windows Internal Database VSS Writer
Service name: WIDWriter
Service type: Win32OwnProcess
Description: “@%systemroot%\WID\Binn\Resources\wid.rll,-2004”

Image hashes

MD5: d63fc56c7c3f9b576bc25f617e3f7963
SHA-1: 6f1809987d542421fac7561a24f46421918b4cd8
SHA-256: 1f1d024a6a41dd93de4f09999d90db5148d87c1c1ddeffc0407c6e59eb7199d1

PE image details

CLR assembly: Yes
Langauge*: Microsoft Visual C# / Basic .NET
File packed: No
Import Table
Export Table
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