1/9/2024 0 Comments Sql server deadlock page size![]() ![]() Here is a query to get the size of the changetracking tables. The bigger those tables get, the more likely you'll get deadlocks while querying them. 1 : Check the size of your changetacking tables and your retention period. Here is a few things that I've done to reduce them. The deadlock graph caught with the insert statement of this table only. I've been having deadlock problems for years on changetracking tables. )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON ĪLTER TABLE. IDENTITY(1,1) NOT FOR REPLICATION NOT NULL, It would be interesting to see the text behind the deadlock chart to find out what the SQL causing the deadlocks is. Also, reading over a few other post in this forum I do seem to recall there were issues with the system health session capturing multi-victim deadlocks in SQL Server 2008 and R2. ![]() I have to use these basic Indexes above for generating reports and it wont give any way to do so. As soon as SQL Server detects a deadlock it will act to resolve it, by killing one of the deadlocked processes, and rolling back the transaction it was running. Since this is about updating operations, READ COMMITTED SNAPSHOT is not likely to help. SQL Server has a lock monitor that provides automatic deadlock detection, by periodically checking for the existence of any circular locking chains. The problem is that the shared read lock is also being taken out at. SQL Server automatically places intent locks at page level to cover operations on rows or indexes in that page, so seeing two processes with an intent lock on the same page is not unusual. At the time of the deadlock the lock was owned by tran 1 and tran 2 was first in line for it before tran 3. In my specific scenario, I'm seeing in various deadlock graphs that queries that should S lock 400-500 rows are choosing to page lock instead - entering the deadlock in the first place. The deadlock graph is showing that two intent locks have been taken on the same page. Though it says the deadlock victim was waiting on a lock owned by tran 2 this is not actually the case. ![]() and with page locks you can get deadlocks even when unrelated rows are updated, if they are on the same page. I'm probably dumb for asking this, but I'm wondering WHY would SQL Server prefer page locking over row locking when running DML queries. As I discussed the ‘unresolved deadlock’ topic with some of my peers the ‘scheduler deadlock’ seemed to get intertwined and confused. If I create non clustered index on any of following columns:Īnd put some load of 100 concurrent users on an SP which simply add single record per user in this table generates DeadLocks and the test for 100 users load fails by blocking each transaction. SQL Server A family of Microsoft relational database management and analysis systems for e-commerce, line-of-business. Having a reproduction and the associated mini-dump capture allows Microsoft Support and the SQL Server Development to track down the source of the problem. ![]()
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