| The wait type PREEMPTIVE_OS_DEVICEOPS is ranked #45 by Stedman Solutions and Database Health Monitor. Wait statistics, in the context of SQL Server, refer to the amount of time that a query spends waiting to access data in the database. When a client application requests data from the database, the request is placed in a queue and the client application must wait for its turn to access the data. The time that the query spends waiting is called a "wait" and is tracked by SQL Server. This information can be used to identify potential performance bottlenecks and optimize the performance of the database. Wait statistics are commonly used by database administrators to diagnose and troubleshoot performance issues in SQL Server. A SQL Server PREEMPTIVE_OS_DEVICEOPS wait type occurs when a task is waiting for an operation on a device, such as a disk or network, to complete. This wait type indicates that the task is executing a device-related system call, such as a read or write operation, and is waiting for the device to respond. The PREEMPTIVE_OS_DEVICEOPS wait type is a type of "preemptive" wait, which means that the task is running in the context of the operating system (OS) rather than in the context of SQL Server. This is because some device operations, such as disk I/O, are inherently OS-dependent and must be performed outside of the SQL Server process. Excessive PREEMPTIVE_OS_DEVICEOPS waits can indicate a potential performance issue, such as slow disk I/O or network latency. To troubleshoot this issue, you can use the Database Health Monitor to track device-related metrics, such as disk I/O rates and network traffic, and identify any bottlenecks. It is important to note that PREEMPTIVE_OS_DEVICEOPS wait types are not always a cause for concern. In fact, they are a normal and expected part of how SQL Server accesses devices for data storage and retrieval. However, if a task is experiencing excessive PREEMPTIVE_OS_DEVICEOPS waits, it could be an indication of a performance issue that needs to be addressed. In summary, a SQL Server PREEMPTIVE_OS_DEVICEOPS wait type occurs when a task is waiting for a device-related operation to complete. This wait type is normal and expected, but if excessive, it can indicate a potential performance issue related to slow disk I/O or network latency. To troubleshoot PREEMPTIVE_OS_DEVICEOPS waits, you can use the Database Health Monitor to track device-related metrics and identify any bottlenecks. Applies toRelated WaitsPREEMPTIVE_COM_QUERYINTERFACEPREEMPTIVE_FILESIZEGET PREEMPTIVE_HADR_LEASE_MECHANISM PREEMPTIVE_OLEDBOPS PREEMPTIVE_OS_AUTHENTICATIONOPS PREEMPTIVE_OS_AUTHORIZATIONOPS PREEMPTIVE_OS_AUTHZGETINFORMATIO PREEMPTIVE_OS_AUTHZINITIALIZECON PREEMPTIVE_OS_AUTHZINITIALIZERES PREEMPTIVE_OS_BACKUPREAD PREEMPTIVE_OS_CLOSEHANDLE PREEMPTIVE_OS_CLUSTEROPS PREEMPTIVE_OS_CREATEFILE PREEMPTIVE_OS_CRYPTACQUIRECONTEX PREEMPTIVE_OS_CRYPTIMPORTKEY PREEMPTIVE_OS_CRYPTOPS PREEMPTIVE_OS_DELETEFILE PREEMPTIVE_OS_DTCOPS PREEMPTIVE_OS_ENCRYPTMESSAGE PREEMPTIVE_OS_FILEOPS PREEMPTIVE_OS_FLUSHFILEBUFFERS PREEMPTIVE_OS_GENERICOPS PREEMPTIVE_OS_GETCOMPRESSEDFILES PREEMPTIVE_OS_GETDISKFREESPACE PREEMPTIVE_OS_GETFILEATTRIBUTES PREEMPTIVE_OS_GETFINALFILEPATHBY PREEMPTIVE_OS_GETPROCADDRESS PREEMPTIVE_OS_LIBRARYOPS PREEMPTIVE_OS_LOADLIBRARY PREEMPTIVE_OS_LOOKUPACCOUNTSID PREEMPTIVE_OS_MOVEFILE PREEMPTIVE_OS_NETVALIDATEPASSWOR PREEMPTIVE_OS_PIPEOPS PREEMPTIVE_OS_QUERYREGISTRY PREEMPTIVE_OS_REPORTEVENT PREEMPTIVE_OS_REVERTTOSELF PREEMPTIVE_OS_SECURITYOPS PREEMPTIVE_OS_SERVICEOPS PREEMPTIVE_OS_SQLCLROPS PREEMPTIVE_OS_WAITFORSINGLEOBJEC PREEMPTIVE_OS_WRITEFILEGATHER PREEMPTIVE_XE_CALLBACKEXECUTE PREEMPTIVE_XE_GETTARGETSTATE PREEMPTIVE_XE_SESSIONCOMMIT PREEMPTIVE_XE_TARGETFINALIZE PREEMPTIVE_XE_TARGETINIT See AlsoAll Wait Types |  |