Expand Transactions and choose the following:.A deadlock occurs when two processes are each waiting for a locked. Expand TSQL and ensure the following are checked:: For example, hot spots occur for concurrent insertions to the last page of a heap.Expand Locks and ensure the following are checked:.Locks can be acquired on rows, pages, keys, ranges of keys, indexes, tables, or. Check the Show all events box to ensure all possible event types are listed SQL Server locks are applied at various levels of granularity in the database.Check the Save to file box and provide an easy to find path for the saved file(s).Ensure the trace is configured to use the Standard (default) trace template.Provide a name for the Trace (Deadlock_ _.After authentication, the Trace Properties Window will display.At the SQL server connection prompt, provide the Server name (include the SQL instance if necessary), and Authentication information necessary to connect to the SQL.This situation creates a cyclic dependency between the tasks, and unless resolved by an external process, both transactions will wait indefinitely. Click the File menu and choose the New Trace option A deadlock occurs when two or more tasks permanently block each other by each task having a lock on a resource that the other tasks are trying to lock.Open SQL Server Profiler - this can be run locally on the SQL server, or from an arbitrary remote machine.Note: The following procedure requires a SQL user with SA level permissions. This type of reporting is only available from a Microsoft SQL server - not an embedded Sybase database. **Note: this configuration option will combine with the previous ones.The following steps can be used to create a SQL server trace log. RECOMMENDED VALUE UPDATE: increase the value by 1. the default number is 5) Configuration parameter deadlock retries is the number of times SQL Server retries the command before giving up and returning the deadlock status to the application. sp_configure "deadlock retries",n (where n is a number. RECOMMENDED VALUE UPDATE: increase the value by 100. Specify the minimum amount of time (in milliseconds) a process must wait before it initiates a deadlock check using the deadlock checking period configuration parameter. Step 2: Set up a trace to capture the blocked process report. sp_configure "deadlock checking period",n (Where n is a number in milliseconds. This will look for any blocking taking 20 seconds or longer. RECOMMENDED VALUE UPDATE: increase the value by 1000. If, somehow, we are running out of lock "slots" this will help fix it. The number of locks parameter sets the total number of available locks for all users on Adaptive Server.
sp_configure "number of locks",n (Where n is a number. It's wise to keep the configured values in case the mentioned solution doesn't solve the problem, so you can revert to their original settings. *** PLEASE, before executing any statement to set the new value, execute the statements without any parameters to retrieve the current configured value. 2) If ALLOWPAGELOCKS OFF, the lock manager will not take page locks on that index. ALLOWPAGELOCKS and ALLOWROWLOCKS decide on whether ROW or PAGE locks are taken. In order to avoid such deadlock conditions, you should configure your database with these settings: Answer: 1) SQL Server takes locks at different levels such as table, extent, page, row. The javacorexxxx.txt file may show a deadlock condition: JVMDUMP007I JVM Requesting Java Dump using JVMDUMP007I JVM Requesting Heap Dump using JVMDUMP007I JVM Requesting Java Dump using 'D:\Program Files\IBM\WebSphere\AppServer\profiles\ctgAppSrv01\javacore.' JVMDUMP007I JVM Requesting Heap Dump using 'D:\Program Files\IBM\WebSphere\AppServer\profiles\ctgAppSrv01\heapdump. The native_stderr log may show that the JVM dumped.
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