Dead Lock (1 reply)
Hi I have a error message for dead lock; ---------------------------------------------------------------------- *** (1) TRANSACTION: TRANSACTION 2044417, ACTIVE 1 sec inserting mysql tables in use 1,...
View Articlesub optimal query plan (2 replies)
I am using mysql 5.5 with innodb. I ran into an issue where one particular query suddenly started using sub optimal query plan. Prior to this, the query was working fine with a response time of 1...
View ArticleInnoDB: Cannot Open file (name) (3 replies)
I've been running my own game server for awhile, and for what ever reason MySQL crashed, I had to uninstall/reinstall MySQL to get it to start up again. I did keep the data folder from the old...
View ArticleInnoDB Data Across Mounted Partition (no replies)
I am creating innodb table to store the data on mounted partition("/var/log/storage/MySQL") with following syntax: create table InnoDB_Test( a INT ) DATA DIRECTORY='/var/log/storage/MySQL' INDEX...
View Articlefalse positive innodb corruption (no replies)
Hi guys, i keep getting this random restarts with the error below and can´t figure it out wich table is getting this nor nothing. Im using 5.6.28 version of mysql and currently im using innodb...
View ArticleForeign Key constraint issue in MultiThreading (no replies)
we are facing Foreign Key constraint issue with MYSql in our multi-threading environment. The application is working fine with Sql Server. There is one table in which Foreign key point to its own...
View ArticleInnoDB Engine freeze? (no replies)
Hello. A day ago I've got an update from 5.6.19 to 5.6.27 version and on a next day there was some strange innodb freeze. When it happened, I could see queries in innotop in their normal state (like...
View Articlemax_allowed_packet error (no replies)
Hi, I am using mysql innoDB engine and i am facing issue with max_allowed_packet. Previously value for max_allowed_packet = 1024, to resolve issues i was changed it to 64M in my.ini file and restarted...
View Articlecache affects update (no replies)
I am doing a very common update in database, lets assume it is: update table_generic set amount = amount + in_amount where id = 1000; Scenario: This update is used in a procedure that interacts with...
View ArticleChange of record locks organization in InnoDB (no replies)
I am looking into the source code of InnoDB and I have a question. Currently all the record level locks are stored in a hash table. Also, locks with the same rec_fold value are stored in the same...
View ArticleInnoDB Auto_Increment behavior (no replies)
Hi All, Please refer to: http://bugs.mysql.com/bug.php?id=199&thanks=3¬ify=199 Peter reported this in 2003. I tested this on Percona 5.7 and MariaDB 5.5.5-10.1.11 last week and found that...
View Articleinnochecksum Error for idbdata (no replies)
Dear Forum, is there a way to repair this form of corruption: [root@hostname idbdata]# innochecksum -p 206334 /var/lib/mysql/idbdata/idbdata01 -v -d file /var/lib/mysql/idbdata/idbdata01 = 3833593856...
View ArticleCorrupted table (2 replies)
Hi We have an error on starting up the server: ERROR InnoDB: Could not find a valid tablespace file The table does not have any related files in the data folder. The table does not show on show...
View ArticleDisable single index instead of all indexes (no replies)
Hi, I am loading millions of records using one of the ETL tool as KETTLE. here is there any possibility to disable single index instead on all indexes in one table. I am aware of below syntax to...
View ArticleHow to optimize/defragment RAM usage of mysqld (2 replies)
Hello, Problem: There is an issue that RAM usage is too high for mysqld, it uses around 86% of memory. Following are the system information, RAM : 48168.6M Buffer pool config:...
View Articlemysql online ddl still lock (no replies)
Hi, My mysql is 5.6.22. It should support online DDL. But I found some strange problem. For some table, it supports online DDL. ALTER TABLE `table_xxx` FORCE, ALGORITHM=INPLACE, LOCK=NONE, will work....
View Articlehow to enable innodb_numa_interleave option? (no replies)
Hi, I don't know how to enable innodb_numa_interleave option. What can I do for it to be enable? show global variables like 'innodb_numa%'; empty result select version(); 5.7.10 Help me.
View ArticleCannot open MySQL database (1 reply)
I have a c# application that opens a MySQL database. For some reason, when I look at the errorlog.txt file I see all the lines that show the connection progress but it stops at the line that says...
View ArticleWhy pure insert operation in master result in update and read operation in...
I use multi threads to do pure insert operation in master,then I use orzdba to observer the mysql status as following picture: http://itpubpic.img168.net/forum/201602/29/112229gg00q4kkaw0qvs4g.png but...
View ArticleHow max Innodb table data size will impact usage performance (1 reply)
Hi, I want to know how big data size of one table will impact table performance. 10 millions records? or 100 millions records? My mysql version is 5.6.
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