| The wait type PREEMPTIVE_OS_LOADLIBRARY is ranked #86 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. The PREEMPTIVE_OS_LOADLIBRARY wait type in SQL Server is a type of wait that occurs when a task is waiting for the operating system to load a dynamic-link library (DLL) into memory. A DLL is a file that contains a collection of functions and resources that can be shared by multiple programs. When a task needs to access the functions and resources in a DLL, the operating system must first load the DLL into memory. The PREEMPTIVE_OS_LOADLIBRARY wait type indicates that the task is waiting for the operating system to load the DLL. This wait type can occur when the operating system is unable to load the DLL in a timely manner. This can be due to a variety of factors, such as high workload on the operating system or inadequate resources. In general, the PREEMPTIVE_OS_LOADLIBRARY wait type is not a cause for concern unless it is occurring frequently and causing performance issues. If this is the case, a database administrator can take steps to optimize the access to DLLs, such as increasing the amount of memory available to the SQL Server process or adjusting the DLL loading settings. In summary, the PREEMPTIVE_OS_LOADLIBRARY wait type in SQL Server occurs when a task is waiting for the operating system to load a DLL into memory. This wait type can be a result of high workload or inadequate resources on the operating system. A database administrator can optimize the access to DLLs to reduce the occurrence of this wait type. 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_DEVICEOPS 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_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 |  |