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I use Windows Server 2008 Standard and SQL Server 2008 version.

I always thought that if the 'Lock Waits' number was high, the 'Average Wait Time' number would be high as well.
In addition, it is a situation that even lock timeouts occur.

However, this time Lock Waits was high, but Average Wait Time was not.
Is this possible? In what cases is this possible?

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This looks like you are mixing up counts and duration lock waits/sec is a count of events per second average wait time - is the duration of the sum of the lock waits / the number of waits in that second.

so the 2 indicators are only correlated if an increase in the number of waits leads to an equivalent increase in the duration of these waits - but there is no reason for this to be true, Also worth noting that there are many different sorts of lock within these numbers - row, page, extent, table etc

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