Database Administrators Stack Exchange
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Questions tagged [ibdata]

ibdata : InnoDB's System Tablespace

ibdata is the usual prefix name of InnoDB's System Tablespace.

The default system tablespace name is ibdata1.

Please note InnoDB Architecture

InnoDB Architecture

From the above diagram, ibdata1 can contain the following:

  1. Data Dictionary
  2. Double Write Buffer (used in Crash Recovery)
  3. Insert Buffer (Used to update Secondary Index change from Buffer Pool)
  4. Rollback Segments
  5. Undo Space
  6. Data Pages from InnoDB Tables (innodb_file_per_table disabled)
  7. Index Pages from InnoDB Tables (innodb_file_per_table disabled)

Adding additional ibdata files results in spreading these seven(7) classes of InnoDB info

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Recover MySQL database from data folder without ibdata1 from ibd files

My WAMP directory accidentally get deleted by another user. Only data folder in MySQLis available. And, in that only database-folders (folders in "\bin\mysql\mysql5.6.12\data\" with name of databases) are available. All files including "ibdata1" in…
cyberwani
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How can Innodb ibdata1 file grows by 5X even with innodb_file_per_table set?

I have innodb_file_per_table set and just today my ibdata1 file jumped from 59M to 323M after I made several changes to an 800M table to reduce it to about 600M. That particular table's .ibd file was reduced but the server's ibdata1 file went crazy.…
Dan
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How to prevent "ibdata files do not match the log sequence number"?

I am dealing with a very large set of databases that are all innodb. I've enountered this on mysql restart too many times for my comfort: ibdata files do not match the log sequence number But I've clearly watched mysql shutdown properly just before…
ck_
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Ibdata usage and Recommendations?

I have a Production server On November 5,2011 the ibdata size was 100G. In Approximate 3 months it is increased to 200G.So it has just doubled its size.So it is a Huge Data.Currently lvm is 251G. I Have approximately all tables with Innodb.I am not…
Abdul Manaf
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MySQL InnoDB over a Raw Device in an Active/Passive topology

We have an Active/Passive topology where there are two x86 complexes with a shared raw storage, where only one of the nodes in a given moment has an access to the shared storage (AKA the active node). In case of a a failover in the active node, the…
Mattan
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Can I move the undo log outside of ibdata1 in MySQL 5.6 on an existing server?

I've been growing concerned about the large size of ibdata1 that can never shrink even when using file-per-table on innodb Moving the undo log files outside seemed logical but this procedure seems rather…
ck_
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ibdata1 grows exponentially when innodb_file_per_table is configured

I Have installed a MySQL Cluster with InnoDB (innodb_file_per_table enabled subsequently), but since I switched to innodb_file_per_table, the file ibdata1 grows (2GB at month). Is My my.cnf file is correct? Why my ibdata1 is so big (22GB)? How I…
Furo83
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I have multiple ibdata files : What should I do with them?

I have 3 different ibdata files on disk. What is the difference between them? Can I remove some of them? The goal is to migrate the files from C: to E:... I'm on MySQL 5.0.x... Directory of C:\MySQL Datafiles 11/19/2012 12:05 PM 287,309,824…
TechFanDan
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MySql - Clean ibdata1

I have a database whose entire size is ~44GB, out of which ibdata1 is ~35GB. That doesnt make sense, since the size of the data shouldn't be more than 10GB. I use the following query to get an esstimation of the data size: SELECT…
Ran
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Two MySQL Server accessing same database over NFS

I want to run two separate MySQL instances on two separate machines, but using same data directory over nfs, is it possible with InnoDB Storage Engine? Application operation will assure the following: one MySQL instance will be a producer one MySQL…
HRK
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Purge old records from mysql ibdata1 file

Is it possible to purge old records from an ibdata1 file without taking down the database attached to it? Records that have been deleted from the database are still present when I scan ibdata1 for strings. I am somewhat aware of how the ibdata1 file…
Andrew Clinton
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Why Optimize Table does not shrink table size?

I implemented this solution for big database, only keep data for 14 days (remove data daily based on date). When I run optimize TABLE table1; The size supposes to decrease but in my case, it increases. /etc/my.cnf…
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MariaDB: how to reduce ibdata file size

I found that My MariaDB's ibdata file keep increasing. So, I've searched for this, and found that innodb_file_per_table should be set as 1. but, my DBMS's configuration has already set as 1; Why ibdata file size keep increasing and what else should…
Bohyun
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ibdata1 increases when firing update queries

I have read a lot of posts which explain that the only solution to stop the growth of an ever increasing ibdata1 file is to: Take a dump of all databases Set innodb_file_per_table in the mysqld section of my.cnf Clean the data directory (except…
Cik
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ib_logfile0 and ib_logfile1 got deleted

After restoring from a percona-xtrabackup without a preparation step, ib_logfile0 and ib_logfile1 were not present in the restore data. Therefor during startup the following message is observed: 140223 04:10:24 mysqld_safe mysqld from pid file…
slava
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