Innodb configuration optimal for my workload? (no replies)
Hi, i have a GPS tracking application, we use MySQL to store the data sent by devices, my application receives the data from the devices via TCP sockets and then launch a thread to insert/update the...
View ArticleInnoDB: Page directory corruption: supremum not pointed to (no replies)
Version: Xtrabacku 1.6 mysql 5.5.13 Linux 2.6.18-238.5.1.el5 #1 SMP Mon Feb 21 05:52:39 EST 2011 x86_64 Issue: /mysql/xtrabackup/bin/innobackupex-1.5.1 --apply-log...
View Articledatabase crash and procesor overload (1 reply)
Hello, The following InnoDB crash caused the procesor to go 100%. Can someone help me with this issue? 111004 10:26:05 [Note] /usr/local/mysql/bin/mysqld: Normal shutdown 111004 10:26:07 [Warning]...
View ArticleInnoDB and autocommit=0 (1 reply)
Hi! I have following configuration set in my.cnf (MySQL version 5.5.16): [mysqld] # General settings datadir=/opt/mysql # InnoDB settings innodb_data_home_dir=/opt/mysql/ibdata...
View ArticleMySql Using 100% CPU (1 reply)
Hello, We had compiled mysql 5.5.9 on our centos 5 64bit machine. Our DB size is around 56GB and is almost totally based on InnoDB. After we started up the server we automatically see the CPU raise to...
View Articlehow to limit DBsize (4 replies)
HI All, I have requirement where i want to create mysql database for end user for their application. But with that i also want to restrict db size beyond which user can not store any further data. So...
View ArticleSHOW TABLE STATUS for InnoDB table (1 reply)
What does the fields in the SHOW TABLE STATUS refer to when the table is an InnoDB table. Specifically the following fields Avg_row_length: 94 Data_length: 409600 Max_data_length: 0 Index_length: 0
View ArticleStrange deadlock problem - deadlock in same trnsaction (5 replies)
I've experienced deadlock after updating the code. I checked the innodb status and noticed transaction 2 is waiting for the same lock which it already had. Why is that? The update sql in txn 2 is...
View ArticleIs free space the only real indicator for optimizing tables? (3 replies)
I have a fairly large database (100G+) made up of several schemas with all tables running in the InnoDB engine, primarily so that we can take advantage of LVM snapshots for backups. I was recently...
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View ArticleMySQL 5.5 Bin logs & InnoDB logs (1 reply)
Hi, Trying to understand the MySQL Server architecture. I couldn't understand the difference between the bin logs & Innodb/storage engine logs (transaction logs). A database in production has to...
View ArticleAny command to initiate a full checkpoint (1 reply)
Is there any command to initiate a full checkpoint, force all dirty blocks in buffer pool to be written to the disk.
View ArticleInsert on duplicate key update only if columns aren't changed (3 replies)
I have an insert statement something like the following: insert into code_value (code_set,code_value,active_ind,display,display_key,updt_dt_tm) values (1,1,1,"test2","TEST2",CURRENT_TIMESTAMP) on...
View ArticleWork Arounds for "The total number of locks exceeds the lock table...
I have a table using InnoDB that has just over 11M rows. Constant inserts. insert TabB select A from TabA limit 1 offset 7000000; gives [Err] 1206 - The total number of locks exceeds the lock table...
View ArticleScheduling SHOW ENGINE INNODB STATUS (1 reply)
Hi This is regarding collection of Innodb health report at regular intervals. From the documentation regarding enabling Innodb monitors, I can see "output generation does result in some performance...
View Articlehow to modify innodb_use_native_aio variable (no replies)
Hi All, InnoDB now has a innodb_use_native_aio system variable that can be disabled at startup if there is a problem with the asynchronous I/O subsystem in the OS. This variable applies to Linux...
View ArticleInnoDB Update that takes a long time (2 replies)
Today a colleague ran an update on a large table: mysql> show table status from auto like 'parts'\G *************************** 1. row *************************** Name: parts Engine: InnoDB...
View Articlechange structure (1 reply)
what is the best way to convert one big ibdata file innodb and make the innodb database as per table innodb datafiles? I am looking for minimum downtime and very safe procedure
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View ArticleHelp Starting MySQL (no replies)
I'm sorry, but I'm new to this. I extracted MySQL and tried to start mysqld and got the following error, any help would be much appreciated: 111030 21:25:40 [Note] Plugin 'FEDERATED' is disabled....
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