What this message 'The InnoDB memory heap is disabled' means? (no replies)
Hi I just installed the MySql 5.6 and when I start it the following message appear in the log file: [Note] InnoDB: The InnoDB memory heap is disabled The database is working fine but I would like to...
View Article130422 InnoDB : Error : unable to create temporary file (1 reply)
Hi All, I am new to Mysql, I am trying to install mysql in linux 5 CUI mode. I started with a) Setting up the basic environment b) MySQL Installing MYSQL Database. while running...
View ArticleMeasuring memory used by temp_table_size (no replies)
What's a good way to measure the average and max amount of memory being used by temp_table size? For example, if I have temp_table_size = 512MB and allow up to 300 database connections, it looks like...
View ArticleMySQL - How to create tablespaces for innodb engine (1 reply)
How can we create/configure tablespace for innodb engine? We want to enable 'file per table' mode so that it creates .ibd file and saves data for all the tables - instead of using shared tablespace...
View ArticleConcurrent INSERT/DELETE (no replies)
Hi, I'm trying to solve concurrent locking on my application. I identified a scenario and I don't know how t solve it. I have a single table T with a column 'id'. Transaction are in READ COMMITED...
View Articlemysqldump skips table for no apparent reason (no replies)
i am having trouble making a mysqldump import work. what i want to do is to set up a slave so i run a mysqldump command (with the flag 'single-transaction' and 'master-data=1'). the problem is that...
View ArticleCan I set innodb O_DIRECT for ZFS file system ? (no replies)
I'm using the mysql 5.5.30 innodb engine , the data are saved in a RAID5 storage array , the partition of storage is configured as ZFS file system, Solaris 10 OS. Can I set innodb_flush_method...
View ArticleInnoDB on RAMdisk optimization for specific purpose (2 replies)
Hello, everyone. Can someone recommend some parameters to be tuned if the InnoDB logs/tablespaces are stored on RAMdisk? Especially to use less memory for MySQL server having the tables located in RAM...
View Article5-6-10 - DDL ONLINE for ALTER TABLE and temp tables (1 reply)
Hello all, I have several questions about MySQL5.6-10 version and online DDL. I have several quite big tables (several Gb) with several hundreds of INSERTs per second on them and some reads in...
View ArticleAFTER INSERT Triggers execute in serial or in parallel? (3 replies)
Hi all. I'm trying to process CDR records (bill phone calls) using an AFTER INSERT trigger. I figured this is best than having a third party app do it each minute. The sequence is as follows: 1) A...
View Articleibdata growing too fast (no replies)
I have inherited a running MySQL production server (5.5.19) which seems to be running out of diskspace rapidly (5GB free). MySQL datadir = /data/mysql5519_prd/ /data/mysql5519_prd/ibdata is now 42GB,...
View ArticleQuery stuck on null state (no replies)
We have a query that executes in less than a second. The same query executed dynamically from a store procedures that is run by an external java process gets stuck holding locks with state null and no...
View Articlehow to upgrade database schema in M-M environment (2 replies)
hi: i have a mysql master-master (active/passive) product environment,developer want to upgrade their app to new version,so lots of change need to be apply on database schema,and the database must...
View Articlehow to recover the lost innodb table due to inode full (no replies)
Hi , the OS is solaris , today the file system inode was full , so the Mysql error happened. and one table's ibd file lost . The error log is below. 130513 15:43:00 [ERROR]...
View Articlemoving binlog_format in M-M while running (1 reply)
Hi all MySQL Community 5.1.41 RHEL-v5 I'm getting a "Transaction level 'READ-COMMITTED' in InnoDB...." Error while writing to a new DB in my M-M configuration. I've followed these references for this...
View Articlejava.sql.SQLException: Cannot execute statement: impossible to write to...
Hello, MySql Version - 5.5.25 I have a Servoy application which use MySql server as a Database. All of my tables are created using InnoDB engine. It was working without any issues but one day it threw...
View Articleabout compress table (no replies)
hi,all i readed something about compress table from doc ,it says if the number of compress failure great than innodb_compression_failure_threshold_pct mysql will leave more free space within each new...
View ArticleTricky problem with parallel update of table. (no replies)
Good day. I have tricky problem which I'm struggling to get right. I have the following situation: 1) InnoDB database 2) There is a table "licences" which has encrypted string "lics" in it. 3) I have...
View Article#1005 - Can't create table (errno: 150) (1 reply)
Can you help me with this code? I don;t have any idea why it doesn't working, it's very important to me. please help SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0; SET...
View ArticleMax buffer pool that can be allocated on server with 128GB RAM. MySQL version...
Hello, Can someone tell me if I have a server with 128GB, how much buffer pool to the max I can allocate. Back in 5.0.80 I was having issues with Windows server running out of handles on if we...
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