假设您使用的是 Microsoft SQL Server 2014。 将 "强制加密" 选项的值设置为 "是" 时,整个 SQL batch 性能将减少50%。 此外,你可以看到主要如果你按如下方式收集 XEvent "wait_info_external",则等待类型为PREEMPTIVE_OS_ENCRYPTMESSAGE: CREATE ...
Assume that you use Microsoft SQL Server 2014. When you set the value of the "Force Encryption" option to "Yes", the overall SQL batch performance will be reduced by 50%. In addition, you could see the major wait type isPREEMPTIVE_OS...
Assume that you use Microsoft SQL Server 2014. When you set the value of the "Force Encryption" option to "Yes", the overall SQL batch performance will be reduced by 50%. In addition, you could see the major wait type is PREEMPTIVE_OS_ENCRYPTMESSAGE if you collect XEvent...
The worker thread represents a logical thread in SQL Server that is internally mapped (1:1) to either a Windows thread or, if lightweight pooling is turned ON, to a fiber. The mapping is maintained until the worker thread is deallocated either because of memory pressure, or if it has bee...
Most recompilations in SQL Server are performed for good reasons. Some of them are necessary to ensure statement correctness; others are performed to obtain potentially better query execution plans as data in a SQL Server database changes. Sometimes, however, recompilations can slow down batch exec...
The worker thread represents a logical thread in SQL Server that is internally mapped (1:1) to either a Windows thread or, if lightweight pooling is turned ON, to a fiber. The mapping is maintained until the worker thread is deallocated either because of memory pressure, or if it has bee...
BATCHSQLis valid for: DB2 for i (except V5R4 or i6.1) DB2 LUW DB2 on z/OS Oracle SQL Server Teradata How BATCHSQL Works InBATCHSQLmode, Replicat organizes similar SQL statements into batches within a memory queue, and then it applies each batch in one database operation. A batch contai...
For information that can help you use Lifecycle Services to diagnose performance issues, see Troubleshooting SQL performance.备注 The batch platform can detect situations where there are no non-throttled tasks to schedule and run at any given time. In these situations, the batch tries to fetch ...
In SQL Server Analysis Services, you can use the Batch command to send multiple processing commands to the server in a single request. Batch processing gives you a way to control which objects are to be processed, and in what order. Also, a batch can run as a series of stand-alone ...
10 rows per batch, a new extent of size 64KB is reserved for each 10 records batch with the remaining pages in the extent unused but reserved for the object resulting into inefficient space utilization. Thanks to Dan Guzman(b) who provided us with a repro of this...