confused by the innodb gap lock (no replies)
i have a table like create table t ( a int primary key, b int ) engine=innodb; create index inx_t_b on t(b); insert into t select 1,10; insert into t select 2,10; insert into t select 3,20; insert...
View ArticleIs an embedded version available? (2 replies)
Hi, after some browsing the source of mysql I have a few questions. The most important is: Is an embedded version of innodb available? If licencing is needed it would be ok, but it is important to...
View ArticleInnoDB Log (1 reply)
Hello Our MySQL Crashed and when checking the log, the first line of the time of the crash was this. 2014-03-12 16:34:30 e28 InnoDB: Operating system error number 33 in a file operation. I understand...
View ArticleDownload INNODB plugin for MYSQL Version 5.1.36-511 (no replies)
How to get INNODB plugin for MYSQL Version 5.1.36-511
View ArticleSlave with compressed innodb (1 reply)
Is it possible to have a master with normal innodb (not compressed), but have a slave to the mentioned master that has compressed innodb? This is because I have a very large database and would like to...
View ArticleDeadlock while doing performance testing in clojure/mysql (2 replies)
Hi, In our application clojure is used as front end with MySQL 5.0 (Innodb) as backend. After calling various interfaces the result would be stored in the database. It is straight forward insert query...
View ArticleInnoDB Buffer gets to 100% and doesn't go down (no replies)
hi, I have thew following configuration on a 64-bits machine with 32GB of RAM and handling a database of 120GB approx. and increasing... innodb_buffer_pool_size = 18G Some other parameters info:...
View ArticleCommit and select race condition? (7 replies)
When I insert a new row, commits the transaction and instantly after commit, try to select the newly inserted row by id in another connection, I sometimes get an empty result. So how should I...
View ArticleInnoDB plugin creation for mysql 5.5 (no replies)
Hello,I have made some of the changes in the mysql 5.5 source.I need to create an InnoDB plugin in which, changes should me made only in the plugin not in the source code.And i need the correct output...
View ArticleMySQL 5.7: InnoDB Crash Recovery improvements (no replies)
http://mysqlserverteam.com/innodb-crash-recovery-improvements-in-mysql-5-7/
View ArticleMySQL Upgrade from 5.1.51 to 5.6.13 (2 replies)
Hi there, We are planning to have MySQL server upgrade from 5.1.51-log to 5.6.13. So we have been doing some research on what are all the new features got added on later versions. What we found is...
View ArticleDeadlock with InnoDb tables (no replies)
Hi, I'm using the following tables: CREATE TABLE `ASSIGNMENTS` ( `ASSIGNMENTS_ID` char(36) NOT NULL, `REQUEST_ID` varchar(40) NOT NULL, `ARCHIVE_ID` decimal(22,0) NOT NULL, `PLANNING_DATE` datetime...
View ArticleFile operation call: 'Windows aio' returned OS error 221. (no replies)
I have an innodb table with about 21GB of data in it. Fairly reliably, even simple access of the table causes a crash. For example, SELECT * FROM mirth.d_mc1 limit 1; causes the server to crash. This...
View ArticleStoring tables on multiple files (1 reply)
I have a database file that is stored in a offline location. Daily it may produce up to 1GB of data. The thing is that sometimes backups have to be made. After months, that backup can become huge and...
View ArticleFULLTEXT indexes and MATCH not giving hoped for results (1 reply)
Hi On mySQL v. 5.6 using InnoDB tables. I am trying to optimize some slow queries. The queries use a lot of LIKE '%term%'. I thought this could be improved by re-writing these as MATCH queries, after,...
View Articledelete cascade with query cache (no replies)
Just upgraded to 5.6.16. Deleting a parent table's row with FK delete cascade does not cascade the child table row. The child row still show the row that should have been deleted. This only works when...
View ArticleUsing indexes for "IN" clauses with composite values (3 replies)
It seems that using "IN" clauses with composite values, does not use any of the indexes that might exist for the individual keys. For example: SELECT * from foobar where (`field1`,`field2`) IN...
View Articleempty or incomplete columns with "*" or grek (Greek) column selected. (no...
Looks like greek chars. cause problems if grek column is selected with '*' or comma seperated list. Some data get left out. mysql> select bref,srce,etyp,tget,abot,quot from honour where bref='Mt...
View ArticleDeadlock for weeks in innodb status (no replies)
I just happened to notice that bunch of our databases are reporting deadlocks in innodb status. The errors have been there for weeks. We have not noticed any performance or downtime issues. I am...
View ArticleHelp with database query #1064 - You have an error (no replies)
I am doind this query UPDATE trans t JOIN accounts ON(t.user_id = a.id) JOIN (SELECT user_id FROM trans GROUP BY user_id HAVING SUM(amount) > 0.00005460 ) tt ON(tt.user_id = a.id) GROUP BY a.id SET...
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