The PAGELATCH_EX wait type in SQL Server refers to a wait condition that occurs when a task is waiting for an exclusive latch on a page in memory. Latches are lightweight synchronization objects used by SQL Server to protect in-memory …
The PREEMPTIVE_OS_PIPEOPS wait type in SQL Server occurs when a thread is executing an external operation that requires communication with the operating system via named pipes. Named pipes are a method of inter-process communication (IPC) that SQL Server sometimes uses …
In the world of SQL Server performance tuning, understanding the various internal mechanisms of the database engine can be critical to identifying and resolving performance bottlenecks. One such important internal component is the SOS_WORK_DISPATCHER. This system thread is part of …
Below are some of the wait types that you can typically ignore. CXPACKET unless it is significantly huge. VDI_CLIENT_OTHER – typically not an issue. It typically means a new replica is seeding or any other user initiated workflow that triggers …
In SQL Server, wait types provide insights into resources or events that SQL Server threads are waiting on. The RESOURCE_SEMAPHORE wait type is one of these indicators, and it specifically pertains to queries waiting for memory grants. Here’s a breakdown: …
The QDS_SHUTDOWN_QUEUE wait type was introduced in SQL Server 2016, and is part of the query store. It doesn’t indicate a problem, and can be ignored when analyzing performance issues.
Understanding the TRACEWRITE Wait Type in SQL Server and Its Performance Impacts The TRACEWRITE wait type in SQL Server is often one of those lesser-known wait types that doesn’t get a lot of attention. However, like all waits, it can …
Troubleshooting the OLEDB Wait Type in SQL Server The OLEDB wait type in SQL Server typically occurs when a query makes a call to a remote server and waits for data to be returned. This often happens with linked server …
The LCK_M_IX wait type in SQL Server indicates that a session is waiting to acquire an Intent Exclusive (IX) lock on a resource. This type of lock is often encountered during operations that modify data, such as inserts, updates, or …
LCK_M_X Severity May indicate locking and blocking, possibly related to IO bottlenecks. Description This is an Exclusive Lock, that commonly occurs when lock escalation is occurring. Suggestion Look for large transactions, tune queries to run faster. Check for lock escalation. …