Preventing phantom reads with Read Commited isolation (1 reply)
Hello everyone. When performing transactions i usually start the transaction with a read commited isolation , with an optimistic approach ,and than i can switch to pessimistic approach for certain...
View ArticleMySQL 5.6 slave Slave_IO_State is in system lock state (no replies)
I have the same problem as http://forums.mysql.com/read.php?22,598354,598354 version 5.6.15-log, master-master replication, the standby slave is not able to keep up. There's no obvious bottlenecks in...
View ArticleTechnical Query on Mysql--InnoDB storage engine currently doesn’t support...
"We are currently working on a Partitioning solution. We are currently using Mysql Enterprise edition 5.6 in our systems and we came to know that InnoDB storage engine currently doesn't support...
View ArticleMySQL hangs due to large delete (1 reply)
Hello! We are currently using MySQL 5.5 running on Ubuntu 12.04. We have quite a big table and we are doing several large deletes on this table in one batch (We use the executeBatch() method from our...
View Articlevalue returned by innodb fulltext searches differs from myisam one (no replies)
In short, myisam returns a value that is calculated over the words frequency, while innodb seems to ignore it and just returns the same value for the whole resultset (sorry for the lack of proper...
View ArticleCan't see rows inserted by a running transaction when isolation level is...
Hi, I have applications that insert rows into table A concurrently. Each application inserts rows in batch mode (using a JDBC prepared statement) using a single transaction per batch (to avoid...
View ArticleSuper slow load data infile with index (no replies)
I am loading tab delimited data from numerous files into a newly created table. If I use three non-unique value indexes then load times increase almost exponentially. Without index, loads times are...
View ArticleDatabase corruption (no replies)
Hello, I'm using the MYSQL Community Server 5.6 and MYSQL56 Service crushed in two different times (months betwen) and then it didn't recover. Only with innodb_force_recovery = 3 i succeed to dump and...
View ArticleAutomatic Extension Question (no replies)
I'm supporting a web application that uses mysql for its database. Our install uses Linux and mysql version 5.1.52. I wasn't around for the inital installation and configuration. I think it is a...
View ArticleMySQL 5.5 hangs frequently in production environment (no replies)
Hello All, We have our Mysql production database (ver 5.5.2) running on on HP-UX (ver 11.31) and use InnoDB engine. Lot of operations are occuring on this database. We are encountering complete...
View ArticleREFERENCES table is changed when rename the parent table (no replies)
Hi i am working on 5.5.37 mysql and AWS RDS instance i have two tables objects (parent table have more 5 million rows) and object_units( child table have more than 8 million rows) there is forgein key...
View ArticleDEADLOCKS, INDEXING AND PRIMARY KEY'S - INNODB TABLE (1 reply)
Frequently receiving dead lock issue in innodb table. Please check the below dead lock and table structure. Kindly help to fix this issue LATEST DETECTED DEADLOCK ------------------------ 2014-06-26...
View ArticleHow to repair corrupted InnoDB (no replies)
Hello, after a server-recovery to the saved data from yesterday MySQL won't start. starting mysqld shows the following errors. Can anyone help me to repair this database? I think that the...
View ArticleCritical Issue: Field value changes back to older value after a successful...
I'm having a critical issue with one of my InnoDB tables. I have field that requires to constantly be updated. 1. The Update does not return any errors 2. The value sometimes is shown correctly but...
View ArticleDoes changing a UNIQUE KEY lock the table? (no replies)
Hi, I have a large table with about 4 million rows in it. Usually ALTER TABLE operations take a significant amount of time and lock the table during the process (understandably so). We need to remove...
View Articlemysql crash (no replies)
the follows is the mysql error_log,I cannot find why the mysql-server always crash by automatic,any one can help me? thanks! 2014-07-03 23:00:59 20639 [Note] Plugin 'FEDERATED' is disabled. 2014-07-03...
View ArticleMySQL Partitioning (no replies)
Hi All, I want to use MySQL partitioning.In the document, i can find how to do partitioning i.e Range,List,Hash partitioning etc.. However i can't find how to configure multiple data Node in the...
View ArticleLarger than expected tmp files querying InnoDB format database (2 replies)
Greetings, I am seeing excessive size of MySQL tmp files when executing queries against an InnoDB format database. Otherwise, no apparent errors or concerns. With one query I compared our server and a...
View ArticleMySQL 5.5 performance is slow when querying cross database union view (1 reply)
Our software populates a new database every year with our clients financial records. We keep each year in a separate database as a way of archiving old data. Sometimes there is a requirement to query...
View Articlemysqld tainted with INFO: rcu_sched self-detected stall on CPU { 0} (no replies)
Hey, Our mysql 5.5 database is hosted in a ec2 instance and during one of our daily backup runs, we noticed the following in /var/log/messages, shortly we lost access to the box,so could not dive...
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