A situation caused by two or more processes being unable to proceed (and thus release their locks) because they are blocked by locks on resources held by the other process.

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Getting deadlock information easily

I know to check for live deadlocks select * from sys.sysprocesses where blocked>0 However, that is only for deadlocks that are current. How do we check for deadlocks from the say the last 24 hours? ...
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Oracle 11g hunting down the deadlock, maybe foreign key?

I am trying to understand why a deadlock occurs in my database. The trace tells me that two updates on the same table are locking. In table is the first table to be written to in an transaction, only ...
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1answer
189 views

ORA-04020 on Oracle SE1 (11.2.0.1)

We've been experiencing some deadlock issues on our Oracle SE1 (11.2.0.1) database server (Red Hat 5/64bit) Seeing ORA-04020 errors in the logs. Is going to 11.2.0.2 the only way to resolve the ...
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2answers
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How to handle deadlock issue sql server 2008?

I have a simple application.This application update data of a table (B) from another table(A) which is changed every 60 sec. User may read data at any time so creating deadlock. How is this sort of ...
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2answers
435 views

Alternatives to sp_indexoption for Row Locks and Page Locks in SQL Server 2008

Are there better alternatives to setting the Row Locks and Page Locks in SQL Server 2008? The case here is to set the row and page locks to false on the table. The lock is in effect during a series ...
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MySQL deadlock - cannot restart normally?

MySQL version 5.5.13-1 A snippet from the SHOW ENGINE INNODB STATUS\G: LATEST DETECTED DEADLOCK ------------------------ 111218 10:22:34 *** (1) TRANSACTION: TRANSACTION 1318D95B, ACTIVE 0 sec ...
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SQL Server Deadlock Log Entries

We're analysing a deadlock situation on a SQL Server 2005 database and have set the trace flags 1204 and 1222. In the resulting logs we're seeing the following line repeatedly: "Log Viewer could not ...
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Shared and IX locks causing deadlock (Sql server)

In my environment, I have 2 tables - Issue and IssuePropertyValues (which has foreign key reference to the Issue table). Now, we insert values into these 2 tables using the below 2 queries: INSERT ...
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510 views

How does SQL Server determine the order it takes locks in while selecting a table?

I have two stored procedures that are deadlocking when the system is under load. Proc A is selecting from a table while the Proc B is inserting into the same table. The Lock Graph is showing that Proc ...
2
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1answer
626 views

mysql replication deadlock slave stopped

I've a master and slave and got the slave stopped with the following error log in slave. I want to fix this and get the two servers on synch and get going again. 111128 8:42:24 [Note] Slave I/O ...
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2answers
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Will these two queries result in a deadlock if executed in sequence?

This is almost certainly the cause of my other question, but I thought it was worth separating the two as I have a hypothesis based on the following log that I would love to have falsified or ...
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2answers
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can I resolve a deadlock with the rowlock hint?

I have a large delete stored proc and I've reproduced a deadlock in a situation where the deletes would not have deleted anything. It looks like the part of the stored proc that hit a deadlock was ...
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3answers
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Notification on long-running query or deadlock in SQL Server 2008 R2?

I'd like to know if there is a way to send a notification on deadlock? If so what queries would be required. I understand that SQL Server takes care of deadlocks, I simply would like information on ...
2
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1answer
422 views

Locking, deadlocking workaround while process data at the same table

My database has a table: tableX. Task1 makes intensive INSERTs (1000 records per minute) as records to process and very seldom UPDATEs (1-2 records per minute) as records to recalculate. At the ...
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2answers
4k views

Why does this query cause a deadlock?

Why does this query cause a deadlock? UPDATE TOP(1) system_Queue SET [StatusID] = 2, @ID = InternalID WHERE InternalID IN ( SELECT TOP 1 InternalID FROM system_Queue WHERE ...
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1answer
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Are InnoDB Deadlocks exclusive to INSERT/UPDATE/DELETE?

I am Working around MySQL error "Deadlock found when trying to get lock; try restarting transaction". I am going to have to update a program to allow deadlocks. Is it possible that SELECT statement ...
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2answers
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Determine Reason for Deadlock in MySQL

We've been seeing some deadlocks occur but have not been able to reproduce. Is there any way to determine, after the fact, what queries were running, etc to figure out why deadlock occurred?
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Trouble deciphering a deadlock in an innodb status log

We are accessing MySQL from the Microsoft ADO.NET connector. Occasionally we are seeing the following deadlock in our innodb status and haven't been able to identify the cause of the problem. It ...
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1answer
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SQL Server Deadlock Graph - Table, Page or Row Lock?

Is there any way to decipher if a lock in a deadlock graph is Table, Page or Row level? I have all the information I need from the graph, including the Isolation Level, (2) but I really want to know ...