1064 Error Question (2 replies)
Thanks in advance if you can help me with this question. I'm getting a 1064 error on a select query and I can't find the cause. Workbench (and a java struts app I'm working on) throw and error on the...
View ArticleConnections all stuck waiting for semaphores (no replies)
We encountered a problem this morning in a production MySQL server where all of the connections got seemingly stuck waiting on semaphores. 5.1.63-0ubuntu0.10.04.1 We have never encountered this...
View ArticleShow innodb engine status tuning db server (2 replies)
I am new to dealing with the innodb engine status. I also notice a number of these TRANSACTION 0 6929906, not started, process no 1402, OS thread id 140010566186752\n MySQL thread id 28, query id...
View ArticleInnoDB: Page dump in ascii and hex (How to recovery) (1 reply)
I have found that at night cyberterrorist crash my database, plese help me ASAP recovery my site. I have backup of wordpress dabase. I do not neet to recover data. I just need to run database and...
View ArticleMySQL 5.7 DMR: InnoDB Improvements (no replies)
MySQL 5.7 DMR: InnoDB Improvements https://blogs.oracle.com/mysqlinnodb/entry/innodb_5_7_performance_improvements
View Articleoptimizing compression (no replies)
Hi, I'm currently in the process of compressing a rather big database and there are 2 tables which last pretty long. One is of size in FS: # ls -lh *campa_placementidlist1* -rw-rw---- 1 mysql mysql...
View ArticleVery odd issue with foreign key constraint failure (2 replies)
Hi, We have a case where a REPLACE operation odd times throws "Cannot add or update a child row: a foreign key constraint fails" & SQL State: 23000. The exact message is: "(`dbname`.`table1`,...
View ArticleInnoDB: Database was not shut down normally after changing...
I followed Mysql documentation about changing innodb_log_file_size (I tested this procedure also with innodb_fast_shutdown set to 0) and when I start db all seems to be ok but from logs I can see:...
View ArticleProblems with InnoDB Config (3 replies)
Hello. I get an Errormessage at start of MysqlServer ######################### 131005 1:22:19 [Note] Plugin 'FEDERATED' is disabled. 131005 1:22:19 InnoDB: The InnoDB memory heap is disabled 131005...
View Articleoptimizing delete from table with million of records (6 replies)
Hi, I have mainly three tables which refer each other like this: Category | 1 ----> n | Package | 1 ----> n | File All three tables are InnoDBs with foreign keys. Category has currently 186...
View ArticleLarge Innodb table - best practice (6 replies)
Hi, I have a 28GB database and one table is 18GB. I can't split out the table as I've already removed fields that weren't commonly required in SELECT statements. I'm wondering if there's a best...
View ArticleDeleting All Traces of a DB (1 reply)
I recently tried to import a large amount of data into a table and afterwards it was corrupted. Mysql would crash if I tried to access a certain table. I tried for hours but couldn't fix it so now I...
View ArticleConverting MySQL 5.6.10 - 32 bit to 64 bit version (2 replies)
I am currently using MySQL DB Version 5.6.10 for 32 bit running in 64 bit Window OS.I want to change it to 64 bit without taking any dump..Can anyone help in this?
View ArticleCan I store the .frm and .ibd files at a different location (3 replies)
Hi, As I have recently started working with the mysql where i am trying to study the performance if the metadata and index are stored on the faster storage and the main data is stored on the...
View ArticleMySQL 5.1 - INNODB Crashs (no replies)
The database will get courrupted and go into an loop where it boots and crashes. Something it causeing the tables to get corrupted, but I am unable to figure out the problem. The server is running in...
View ArticleSetting Innodb Buffer Pool Size (1 reply)
I have a database using innodb completely. Its now having a innodb_buffer_pool_size at 128MB. Which I know is very less for my user. But no matter what I do it won't change. I have added a value of 1G...
View ArticleInnoDB + Linux + NTFS = InnoDB data resets every reboot - danger! (6 replies)
Here comes a rather dangerous error, I've googled for it but not found anything relevant. Every time I reboot my system, the InnoDB data is being reset with the following message/error in...
View Articlecount distinct for more than 500,000 rows? (1 reply)
I have a strange situation. An InnoDB table with a couple million rows. A distinct on one of the columns was always yielding 0. With some binary search I found that it is the case then the id is...
View ArticleStructure database for Services with a period (Year, Weeks, Horaires ) (no...
Hello ! I want to create a database structure for the Services in a Catalog with Offres for one or more services. Each Offre is available for one Year period ( example : 01 Janvier – 31 Mai ) , for a...
View ArticleCentOS / my.cnf (2 replies)
I just built a CentOS database server and moved the MySQL data folder to a software raid array. The my.cnf file reflects the change in database folder and socket in the [mysqld] section. I can not...
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