Tb_periodicidadeServico TAB IS GRANT XactĪnybody have any pointers on how to get to the root of the problem? I have a suspicion that the table tb_intervaloServico is the root of the blocking because it's being called in the delete and in the select, but I can't reproduce the behavior. This are the locks generated by the delete. Where ints.idPeriodicidadeServico=ps.idPeriodicidadeServicoĪnd idservicoContrato='7f20b4af-9076-48f9-a861-8b78273eadc3'įor some reason, the delete gets a blocking status and doesn't finish(?) The only other process that I find blocked by this, is a maintenance plan that runs on the weekend to recreate the indices, so I have no ideia what could be generating the problem. I caught this deadlock in my application I am using Hibernate for get data from DB and in my log, I see next: Caused by:. CREATE TABLE Lefty (ID int PRIMARY KEY) CREATE TABLE Righty (ID int PRIMARY KEY) INSERT INTO Lefty (ID) VALUES (1) INSERT INTO Righty (ID) VALUES (2) Then open two windows in SSMS. In a transaction system, deadlocks are a fact of life and not. For Percona Server for MySQL 5.7, I have developed the following script (that you can find in our support snippets repo) that prints SQL history for two transactions involved in a deadlock, that can help in troubleshooting some complex deadlock cases. This double step can cause your deadlock. The following SQL statement is occasionally generating deadlocks in my mssqlserver 2000 server delete from tb_intervaloServicoįrom tb_periodicidadeServico ps, tb_intervaloServico ints When I try to make UPDATE with subselect I catch deadlocks. This example is ripped almost 100 from Brent Ozar's video on deadlocks, but changed one command to a SELECT. A deadlock in MySQL happens when two or more transactions mutually hold and request for locks, creating a cycle of dependencies. When you use a secondary index to locate and lock a row, MySQL will first lock the entry in the secondary index, and, after that, the corresponding row in the primary key. At Percona Managed Services, sometimes clients’ applications face deadlock situations and need all historic deadlock information for application tuning.
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