When the arrow points from the lock to the resource, it was granted. When the arrow points from the resource to the lock, it wasn't granted. This indicates that a lock was requested, but could not be granted. Note: Many of the deadlocks in the table below show an orange dotted line. Select the Play button from the Deadlock Graph toolbar to start the Deadlock Playback.Select a desired Deadlock in the Grid view to display the Deadlock in the Deadlock Graph.Playback the sequence of events for a selected Deadlock by completing the following: Zoom in and out on the Deadlock Graph using CTRL + Mouse Wheel or through the right-click context menu. Select object nodes in the graphical representation to focus on that object in the Gridview. The letters indicate the requested Lock mode.The numbers and associated arrows between each node indicate the actual sequence of events that took place, leading to the deadlock.The deadlock victim is highlighted with a red background.Process and Resource nodes are independently represented, along with any relationships that exist between them. The Deadlock Graph is formed according to the captured deadlock XML. The Top pane provides client filters for specifying which records to display for the selected interval.Īdditional Information: For general background information about what constitutes a SQL Server deadlock, see the Deadlocking MSDN articles.įor general information about the metrics displayed, see the Deadlock Metrics section at the end of this article. Select a time range and then use the Go toolbar button to view deadlocks that happened during that time period.Īlternatively, use the Jump To Last Deadlock button to navigate to the last deadlock. When the auto-refresh Pause button is selected, the tab goes into History mode. In Real Time mode, any deadlocks that happened within the last 10 minutes display. When the auto-refresh Play button is selected, the tab enters Real Time mode. The active mode is controlled through the toolbar. The Deadlocks tab has two modes, Real Time and History. The OCM condition uses the entire deadlock XML to match against, making it a powerful tool in pinpointing specific deadlocks. The OCM condition is useful in narrowing the notifications you see concerning deadlocks. There are numerous actions that you can take in response to this condition occurring.Ĭonfigure an action in response to the SQL Server Deadlock: Output Content Match (OCM) condition through the Conditions pane (View > Conditions). ![]() The SQL Server: Deadlock condition occurs each time there's a deadlock in your environment. For more information about retention, see the Data Capacity Planning topic.Ĭonfigure actions in response to two SQL Server deadlock conditions. This is controlled with the Keep Performance History For Setting found on the Storage tab of Global Settings ( Navigator pane > Configuration > Global Settings > Storage tab).
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