![]() ![]() If this number is high, your server may have resource limitations. The Lock waits per second counter tracks the number of times per second that SQL Server is not able to immediately retain a lock for a resource.Īverage Latch wait time in milliseconds for latch requests that had to wait. ![]() In order for SQL Server to manage concurrent users on the system, SQL Server needs to lock resources from time to time. The Re-compilations per second counter measures the number of times a re-compile event is triggered per second. When an execution plan is invalid due to some significant event, SQL Server re-compiles the plan. ![]() The number of Compilations per second should be compared to the number of Batch requests per second to see if complications are affecting performance. Compiling an execution plan is a resource-intensive operation. The number of times SQL Server compiles an execution plan per second. This counter is a good indicator of how much activity is processed by your SQL Server box. Reflects the number of batches SQL Server receives per second. The longer a page stays in memory the more likely that SQL Server won't need to read from disk to resolve a query. Measures how long pages stay in the buffer cache (seconds). The higher this number is the better because it means that SQL Server was able to get data for queries out of memory instead of reading from disk. The buffer cache hit ratio counter represents how often SQL Server is able to find data pages in its buffer cache when a query requests a data page. Number of currently active transactions (all types). ![]()
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