innodb deadlock on UPDATE (3 replies)
I have a situation that is in a deadlock with two client threads trying to do an update on the same table but different rows. This shouldn't be happening, and I can't figure out why. Below I've...
View ArticleWhat is the different between ib_logfile0 and ib_logfile1? (1 reply)
There are lots of topics about ibdata1 and the "ib_logfile0 and ib_logfile1", but there is almost 0 question about what is the difference between ib_logfile0 and ib_logfile1, so who can do me a favor...
View Articleinnodb growing oversize mysql version 5.5.28 (1 reply)
Dear MySql community , it would be nice if you could explain me ( and possibly try to recover) the following situation: ibdata1 is unexepectly growing oversize in mysql : mysql> SHOW VARIABLES LIKE...
View ArticleImage data in mysql (1 reply)
Hi, CPU in my host is too high. I create a table with a column using blob type. The MySQL stores some image data in blob type. Are these image data also stored in innodb_buffer_pool_size ? I want to...
View ArticleMysql Match…against query performance in InnoDB Mysql 5.6 (1 reply)
I need to search records in the table which contains millions of records. I have recently updated Mysql version from 5.1 to 5.6. I was using `like` in query which was taking around 15 sec to 30 sec....
View ArticleInnodb Row size too large (> 8126). (no replies)
Hello All I have encounterd a problem on engine conversion from myisam to innodb, it shows error like: ERROR 1118 (42000): Row size too large (> 8126). Changing some columns to TEXT or BLOB or...
View ArticleDifferential Backups and returns of InnoDB (no replies)
Hi, is there some good reading material for beginners (a tutorial) on how to set up differential backups of InnoDB databases and also how to return them (especially during an emergency situation). I...
View Articlerandomly Very slow insert for one 2G size table (1 reply)
we use 5.1.60-enterprise-commercial-advanced-log, on HP box. Sometimes we randomly having very slow insert for table following tale, which is 4M rows, and have around 2G size ibd file. general the...
View Articlewhich is DB type is best for DATA WAREHOUSE (no replies)
Hi, I am trying to built warehouse using MySQL Database, i used two types InnoDb and Myisam in different scenarios. as per my observation, Innodb is fast compare to Myisam DB type, could you please...
View Articletable does not exist (no replies)
today I faced a strange situation...suddenly when trying to access a table through PHPMyAdmin...I got a message saying'tables does not exist'...nonetheless the table and its columns were listed in the...
View ArticleCreation of More than One Foreign Key for single column in InnoDB Table (1...
Dear Forum Member, Any one of you can help me to clarify that InnoDb table can have two different reference tables for single column as foreign key constraint? and which is either effect the...
View ArticleGot error 168 from storage engine. (no replies)
ERROR 1030 (HY000) at line 241206: Got error 168 from storage engine. I export data from mysql5.6.22（centos 6.6-64bit）to 5.7.7rc（centos 7 64bit）. then got this erro.
View ArticleCannot add column to partitioned table (3 replies)
MySQL 5.6.14 32-bit on Window 8.1 Partitioned table - total 95 partitions / 290K records alter table oamdelaytestresultentity add column sumOfSquaresRoundTripTime bigint(20) DEFAULT 0; error:...
View ArticleIs there any data may happen while migrating InnoDB Database to MyISAM (no...
Dear forum member, I have doubt in migration of data between different storage engine ,may cause any data loss? like while migrate database to innodb to myisam engine
View ArticleGot error -1 when reading table (no replies)
Good morning, I recently found the following errors on an InnoDB table: 150804 9:52:36 [ERROR] Got error -1 when reading table './xxxx/yyyy' 150804 9:52:46 [ERROR] Got error -1 when reading table...
View ArticleInnoDb Table generation while restart the DB Server (no replies)
Dear Forum Member, I have doubt that Either Database Table are recreated or not While restart the database server with InnoDb as default storage engine?
View ArticleHelp with MySQL Command (no replies)
Hallo, One question: I had a table (InnoDB) like: myid int(6) not null auto_increment primary key, OrderNum int(5) not null, Ammount double(15,2) default 0 Data example: myid____OrderNum_____Ammount...
View Article=" can use index? is this true? (no replies)">the where condition field after ">=" can use index? is this true? (no replies)
I have a table T like this Create Table: CREATE TABLE `T` ( `id` int(11) NOT NULL AUTO_INCREMENT, `a` int(11) NOT NULL DEFAULT '0', `b` int(11) NOT NULL DEFAULT '0', `c` int(11) NOT NULL DEFAULT '0',...
View ArticleActive seconds (no replies)
Hi Team, I have few questions. 1.possible reasons to make a MySQL thread active. 2. When executing show engine innodb status \G the thread is active but in sleep. Why it is showing and what happened...
View Articlelocks in table (1 reply)
Have table: CREATE TABLE `map_data2` ( `vehicleID` int(11) NOT NULL, `eventDate` int(11) unsigned NOT NULL, `recordType` tinyint(1) NOT NULL DEFAULT '0', `latitude` decimal(10,7) NOT NULL DEFAULT...
View Article