| The wait type PREEMPTIVE_OS_VERIFYTRUST is ranked #118 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.
What Is PREEMPTIVE_OS_VERIFYTRUST?This wait type shows up when SQL Server needs to check if it can trust something�like a file or a piece of code�by asking the operating system (Windows, in this case) to verify it. Think of it as SQL Server playing security guard, making sure everything it�s about to use is legit before letting it through the door. The �VERIFYTRUST� part is that double-check, and �PREEMPTIVE� means SQL Server steps outside its usual routine to let the OS handle this task. In simple terms, it�s like SQL Server saying, �Hey, Windows, can you vouch for this file?� and waiting for a thumbs-up before moving on. Why Does It Happen?You�ll see this wait type when SQL Server is dealing with stuff that needs a security check�things like loading a signed DLL (a type of helper file), validating encrypted backups, or checking digital signatures on scripts or assemblies (think custom code running inside SQL Server). It�s part of keeping your database safe, but it takes a moment because the OS has to do the heavy lifting. It�s not a big deal unless it�s happening a lot or taking forever. That could mean you�ve got a bunch of security checks piling up or something�s slowing down the OS�s response�like a busy server or a glitchy file. How Can You Track It?To see if PREEMPTIVE_OS_VERIFYTRUST is holding things up, you can use the Historic Waits feature in Database Health Monitor. This tool keeps a running log of wait types, showing you when this wait pops up and how long it lasts�like during a backup restore or when loading custom code. It�s like having a security camera that catches SQL Server waiting on the OS. By watching it, you can tell if it�s just routine safety checks or if you need to dig into why those verifications are dragging on�maybe optimizing your assemblies or checking server load. Final TakeawayPREEMPTIVE_OS_VERIFYTRUST is SQL Server�s way of pausing to make sure everything it�s working with is trustworthy, with a quick assist from the operating system. It�s a normal part of staying secure, but if it�s racking up time, it�s worth a look. Tools like Database Health Monitor make it a breeze to monitor this wait type and others, keeping your database humming along. Want to get a handle on your SQL Server waits? Check out Database Health Monitor�a free tool from Stedman Solutions that tracks wait times and helps you spot performance hiccups fast. Download it today and see what�s slowing your database down!
Applies toRelated WaitsPREEMPTIVE_CLUSAPI_CLUSTERRESOURPREEMPTIVE_COM_COCREATEINSTANCE PREEMPTIVE_COM_CREATEACCESSOR PREEMPTIVE_COM_GETDATA PREEMPTIVE_COM_QUERYINTERFACE PREEMPTIVE_COM_RELEASE PREEMPTIVE_COM_RELEASEROWS PREEMPTIVE_COM_SEQSTRMREAD PREEMPTIVE_COM_SETPARAMETERINFO PREEMPTIVE_COM_SETPARAMETERPROPE PREEMPTIVE_DTC_BEGINTRANSACTION PREEMPTIVE_FILE_MAPPING PREEMPTIVE_FILESIZEGET PREEMPTIVE_HADR_LEASE_MECHANISM PREEMPTIVE_OLEDB_RELEASE 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_DEVICEIOCONTROL 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_LOADLIBRARY PREEMPTIVE_OS_LOGONUSER 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_SETFILEVALIDDATA PREEMPTIVE_OS_SQLCLROPS PREEMPTIVE_OS_WAITFORSINGLEOBJEC PREEMPTIVE_OS_WRITEFILE PREEMPTIVE_OS_WRITEFILEGATHER PREEMPTIVE_SERVICE_CONTROL_MANAGE PREEMPTIVE_SERVICE_CONTROL_MANGE PREEMPTIVE_SHAREDMEM_GETDATA PREEMPTIVE_XE_CALLBACKEXECUTE PREEMPTIVE_XE_DISPATCHER PREEMPTIVE_XE_GETTARGETSTATE PREEMPTIVE_XE_SESSIONCOMMIT PREEMPTIVE_XE_TARGETFINALIZE PREEMPTIVE_XE_TARGETINIT All Wait Types |  |
