Ending a transaction by reverting to the changes made by the transaction.

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33 views

How costly are InnoDB rollbacks?

I recently heard a fellow co-worker mention that InnoDB rollbacks are costly and negatively impact performance. How true is this statement? To give a context, we use spring+hibernate and set @...
5
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1answer
30 views

During rollback, is lock escalation reversed

Generally, SQL Server will take locks during updates. It also supports Lock Escalation: Lock escalation is the process of converting many fine-grain locks into fewer coarse-grain locks, reducing ...
0
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1answer
48 views

How to recover auto committed transaction in Oracle with normal privilage

I have updated the table & need to rollback that changes. I have tried Rollback work command but data still not rollback. I have also tried Flashback command but it is not working because "row ...
3
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2answers
50 views

SQL Server - What access do I have during a transaction rollback?

As the title says, do I have read/write access to my entire database while it is rolling back a transaction? Or read/write access to only the tables that the transaction did not write to? What is the ...
2
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0answers
92 views

InnoDB crashes on trx rollback

I have InnoDB assertion failure during the trx rollback 160316 10:47:31 InnoDB: Rolling back trx with id 5ADBE4173, 1 rows to undo 160316 10:47:31 InnoDB: Assertion failure in thread ...
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1answer
51 views

How to quantify rollback events in SQL Server between 2 dates

I need to quantify rollback events and find theirs reasons, without change the application code. There is any way to collect this data? The reason to check the rollback occurrences have need to ...
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1answer
71 views

Prepare MySQL for big UPDATE query on production server

Surprisingly I have not found anything relevant on this subject. What are best practices to prepare production MySQL server for a big update query? The question is broad but I'd like to know details ...
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0answers
32 views

Because of a wrong entry with wrong date, how can we rollback a database synchronized over multiple systems?

On a mobile device, a set of operations has been saved in the local DB with a wrong date (because the system date was set in the future). Then the device regularly doing synchronisation with a server ...
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1answer
142 views

SQL Server Rollback being performed - how to stop it?

I have a query that takes 60 million rows, copies them in a new table, does some updates on them, then inserts them into another new table. It's all wrapped in a transaction. I thought this would be ...
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1answer
37 views

Report rollbacks to log file

There are several reasons for SQL transactions to rollback. I want to log all of them to the SQL Server Log File so that I can find information about them at a later time in the SQL Server Log File ...
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2answers
143 views

What are all the ways an open transaction will rollback?

When a transaction is opened in SQL Server, what are all of the ways that it can be rolled back? We are currently working with a 3rd party application that is frequently showing open transactions ...
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0answers
66 views

Identifying table causing runaway rollback in MySQL 5.5 (InnoDB / Windows)

I have a large database (180 GB), running under Windows, with a runaway rollback that starts running as soon as the database is started up. I have started the database with innodb_force_recovery=3 ...
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2answers
315 views

How are these two SQL Server rollbacks different?

In SQL Server 2008 R2, how are these two rollbacks different: Run an ALTER statement, for a few minutes, and then hit 'Cancel Executing'. It takes a few minutes to rollback completely. Run the same ...
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1answer
44 views

Mysql: How does a rollback operation be performed inside InnoDB

I would like to hear in simple words Please answer me in simple words to the question on the below scenario. ============== Engine: Innodb Trx1 : started and a DML is executed at 10:00 AM and rolled ...
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0answers
35 views

Taking Backup of a database in mysql

I have database but somehow it has been deleted. Can i take the back-up of deleted database. Please Help. Thanks In Advance
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1answer
49 views

What transaction logs are for

I'm confused about tranasaction logs for SQL Server. I was under the impression they can be used to roll the database forward. For example say I made a software release on Sunday, I added three new ...
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2answers
143 views

Rollback Committed transaction in SQL Server

Is it possible to rollback a committed transaction? I have deleted all the data in a table. The delete statement is inside Begin Transaction and I have committed the transaction with a commit ...
2
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2answers
77 views

Keep local variable after rollback in mysql

I wish to keep local variable from stored procedure even if rollback occurres. In following procedure, i "register" numbers to users. The procedure takes user_id, value_from and value_to as arguments....
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0answers
505 views

MySQL Transaction with rollback upon @@error

I have done several transactions with MySQL but mainly using php's libraries as the handle. Using php you would have something as: $pdo->beginTransaction(); $pdo->execute(' query1; ...
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1answer
53 views

Copy a Large INNODB table in MySQL

I have an INNODB table that's > 93 million rows. A lot of the data is considered "temp" data and is governed by an "is_active" flag of 1/0. When a user updates a form, new data is written with an "...
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2answers
107 views

Maintain Up-To-Date Copy of Very Large Table if Clustering/Partitioning/Moving Operation Needs to be Killed/Rollback

I've appended the following information in a previous post but I asked the 'why' instead of the 'how'. So here's the question... SQL Server 2014, CU6. 4.5 TB database, Simple recovery. The most ...
0
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1answer
65 views

is it possible to rollback only a partition/subpartition?

Is it possible to create a savepoint and to rollback only a partition of a table? Lets assume I created a monthly partition and subpartitions with a group_id for table x. Now i run some stored ...
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0answers
450 views

MYSQL: InnoDB inserts wont rollback transaction inside a stored procedure

I have this stored procedure: START TRANSACTION; code_gen_loop: WHILE @Codes > 0 DO IF MOD( @Codes, 10000 ) = 0 THEN EXECUTE qry_status_stmt2; EXECUTE qry_status_stmt3; ...
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2answers
632 views

Transactional DDL workflow for MySQL

I was a little surprised to discover that DDL statements (alter table, create index etc) implicitly commit the current transaction in MySQL. Coming from MS SQL Server, the ability to do database ...
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2answers
3k views

ROLLBACK doesn't work after INSERT INTO newly created destination table

I am working on PHP-script which imports CSV file (customers.csv) into MySQL table (customers). Before inserting contents of CSV-file into the mysql table I am first backing up the original customers ...
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2answers
2k views

Truncating and inserting in a safe transaction on MySQL

I am trying to TRUNCATE and INSERT data into a MySQL InnoDB table. I wanted to make sure that if any statement in the transaction failed, the data will be untouched. I can't have an empty or ...
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1answer
755 views

Oracle OLEDB Connections hang in SQL Server: Can I restart Instance?

There is a killed/rolled back query on this instance that was originally attempting to execute a SELECT on a remote Oracle Server via OLEDB. This query was running for over two days before it finally ...
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1answer
4k views

Shut Down MySQL during InnoDB rollback after crash

I am puzzled once again. We had a server crash last night during some huge queries. Upon restart in the morning MySQL went into recovery mode. I needed to shut down the MySQL service and it is ...
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0answers
583 views

Identifying if spid on SQL Server is in rollback after low disk space

On a test box I wanted to get an idea of how long adding an identity field would take to a table with roughly a half billion rows. The process ran for about 10 hours and we noticed it was getting ...
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2k views

Log full and an Active_transaction on database

I have limited access to this server eg I cannot SELECT * FROM sys.dm_tran_session_transactions for example I, perhaps foolishly, ran this query to insert some test data... begin transaction update ...
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2answers
456 views

How to stop ROLLBACK in progress?

How do I stop a rollback in progress. I killed a very long running INSERT INTO table1 SELECT * FROM table2 statement. I want to commit what's already there but I can't since it's rolling back. This ...
4
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1answer
493 views

Investigating rollbacks in Postgres

A Postgres monitoring script, check_postgres.pl, is warning me that a large number of rollbacks are occurring on a database server. How can I investigate what queries are being rolled back? I have ...
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1answer
217 views

How to configure read transactions to never cause other write serialization transactions to fail

I am protecting critical transactions with application mutexes and SERIALIZABLE. I presume that this makes these operations as acid as possible, but now I'm concerned that reads might cause failures ...
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226 views

A rollback on a production server that's been running too long

I have a problem with a production server that is causing considerable locking and performance degradation. It all started the night of Tuesday into Wednesday with a procedure that inserts data into ...
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1answer
4k views

Rollback parent procedure on failure in MySQL

I have the following two procedures on my server: CREATE DEFINER=`someone`@`localhost` PROCEDURE `NewMagnet`( IN `nick` VARCHAR(32), IN `tth` CHAR(39), IN `name` TINYTEXT, IN `size`...
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1k views

What problems can be caused by dropping a rollback segment manually?

Oracle version: 11.2.0.1 I have the following error: "Transaction recovery: lock conflict caught and ignored" I can't upgrade my database now. I had a RAC. Removed one node, but the undo tablesapce ...
2
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1answer
164 views

SSIS Transaction Level for Single Task

I have 3 tasks in a SSIS package. If the final task fails I only want that task to rollback. Do I just set that task to REQUIRED? Or leave it as SUPPORTED? Thanks!
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1answer
239 views

how to prevent dropping sysadmin user by another user in sql server

I have a legacy application installed on my server which has configured to work only with one user "sa" and there is time bomb like script written inside this application which whenever it finds ...
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4answers
1k views

How to rollback changes made to the database by a specific user?

In mssql, is it possible to rollback changes made by a specific user to the database? For example if that user ran an update query and did not write begin transaction before, is it possible to revert ...
2
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0answers
766 views

Understanding how sys.dm_exec_requests represents queries being rolled back

I'm not sure whether this was an actual problem or just a normal situation where I needed to wait for rollback to finish. In either case, some insight would be appreciated. Background details I ...
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0answers
276 views

Backup of msdb stuck in rollback

A native full backup of msdb on a SQL Server 2005 Enterprise instance (9.0.4053) deployed on a two-node Win2K3 cluster (Microsoft Windows NT 5.2 (3790)) is currently stuck in rollback. The DB is in ...
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1answer
775 views

connection pooling, transactions, nested transaction and rollback

I've got strange behavior on production. First user request thru application failed, I've got SQLServerException with "Lock request time out period exceeded." After that following requests are ...
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1answer
342 views

After successfully execute this query How do i back in previous stage in MySQL

+----+----------+-----+-----------+----------+ | ID | NAME | AGE | ADDRESS | SALARY | +----+----------+-----+-----------+----------+ | 1 | Ramesh | 32 | Ahmedabad | 2000.00 | | 2 | ...
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1answer
7k views

Uncommitable T-SQL transaction after trigger applied to table

Good morning, I have written a Trigger on a table that should evaluate the entered values (Length, width and Height) and based on those entered values, should update a column (Type) in the same record ...
3
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1answer
1k views

Distributed - across multiple databases or servers - Transactions

I have some doubts related to transactions in SQL. I perform below steps. Connection 1 open for DB1 database Begin transaction for Connection 1 Run the commands on Connection 1 Connection 2 open for ...
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1answer
503 views

Implementing a Record Keeper/Rollback System for a MySQL Database

What's the best way to create a record keeping table for all actions in my database? I have a number of tables inside one database and I want to create another that records all movements in every ...
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1answer
172 views

What will the sql statement “DELETE FROM sales” do?

DELETE FROM sales; And if there are no other uncommitted transactions on the sales table. Which statement is true about the DELETE statement? It removes all the rows in the table and deleted rows ...
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2answers
1k views

Partial rollback doesn't decrement trancount

Suppose I have an open SQL Server session, and do the following: begin tran insert into People (Id) values (1) select @@TRANCOUNT -- Prints 1 save transaction tt begin tran select @@TRANCOUNT --...
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2answers
2k views

How to rollback the identity seed after deadlock

Now that's an approximate sequence of operations Im performing: SET IDENTITY_INSERT <table-name> ON; INSERT SOMETHING to <table-name> with explicitly specifyed id DECLARE @oldID bigint ...
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1answer
139 views

Does a transaction cover the subroutines?

When I begin transaction and exec a stored procedure, does that transaction cover the changes made by the stored procedure I executed? Would a rollback transaction cancel the changes made by the ...