InnoDB Internals: InnoDB File Formats and Source Code Structure
http://forge.mysql.com/wiki/InnoDB_Internals:_InnoDB_File_Formats_and_Source_Code_Structure
This Thursday (October 1st, 14:00 UTC - one hour later than usually),
Calvin Sun will give a session on InnoDB Internals: InnoDB File Formats
I have a question about how InnoDB deals with fragmentation within
it's data files. Let me describe my usage scenario to you:
1.) Records are inserted into a InnoDB table. We'll call this table
A. It contains several different kinds of columns including
VARCHARs.
2.) Records are then processed
but you don't know __when__ innodb_file_per_table was set!
So it's possible that many innodb tables actually reside in ibdata
[1-4].
Check your data directory to see the individual innodb files/tables
(*.ibd).
This is true, and even on a fresh install that has always had
On Apr 26, 2006, at 3:54 AM, Dr. Frank Ullrich wrote:
Duzenbury, Rich wrote:
Hi all,
I've inherited an innodb database that is configured like:
innodb_file_per_table
innodb_data_file_path =
ibdata1:3000M;ibdata2:3000M;ibdata3:3000M;ibdata4:3000M:autoextend
Um, doesn't this allocate 12G that
Duzenbury, Rich wrote:
Hi all,
I've inherited an innodb database that is configured like:
innodb_file_per_table
innodb_data_file_path =
ibdata1:3000M;ibdata2:3000M;ibdata3:3000M;ibdata4:3000M:autoextend
Um, doesn't this allocate 12G that winds up being unused, since
innodb_file_per_table is
Hi all,
I've inherited an innodb database that is configured like:
innodb_file_per_table
innodb_data_file_path =
ibdata1:3000M;ibdata2:3000M;ibdata3:3000M;ibdata4:3000M:autoextend
Um, doesn't this allocate 12G that winds up being unused, since
innodb_file_per_table is set? If so, what is the
guessing that some time in the past deleted data has
not been purged from the innodb file. How can I do this manually? Can
I force InnoDB to rebuild the file? 'SHOW INNODB STATUS' doesn't show
any open transactions.
Marcus
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Marcus Bointon
Synchromedia Limited: Putting you in the picture
guessing that some time in the
past deleted data has not been purged from the innodb file.
How can I do this manually? Can I force InnoDB to rebuild the
file? 'SHOW INNODB STATUS' doesn't show any open transactions.
Data isn't purged when records are deleted from the DB. It will be
overwritten
Dear [EMAIL PROTECTED]:
Here's my setting:
innodb_data_file_path = ibdata1:10M:autoextend
Now the ibdata1 has been grow up to 1.3G
We try to add more ibdata file to store the data by the following setting.
innodb_data_file_path = ibdata1:1500M;ibdata2:1500M:autoextend
innodb_data_file_path =
On Sep 24, 2004, at 4:03 AM, MaFai wrote:
Dear [EMAIL PROTECTED]:
Here's my setting:
innodb_data_file_path = ibdata1:10M:autoextend
Now the ibdata1 has been grow up to 1.3G
We try to add more ibdata file to store the data by the following
setting.
innodb_data_file_path =
I've been reading (and reading...) the innodb documentation about using the
innodb_file_per_table directive, and one thing still confuses me. If i use
this directive, then is it correct that the setting innodb_data_file_path
will specify the shared innodb information?
Also, when i create
Chris,
InnoDB file format changes:
4.1.0 - 4.1.1 introduced multiple tablespaces;
4.1.1 - 4.1.2 or .3allow multiple charsets in the same database
installation (currently only the default charset is used in InnoDB);
5.0.0 - 5.0.x create all new InnoDB tables in a space
Hello,
My HDD is running low and I MyISAM tables are keep crashing... I think that
converting to InnoDB will be more stable, but what about the data files
sizes? convertion to InnoDB will need more or less disk space than MyISAM?
-thanks, Eli
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In my experience, I see about a 2x increase in space required between
MyISAM and InnoDB. I believe this may be documented btw, check the
InnoDB section of the manual.
I have been using InnoDB for a couple years now on databases up to
180GB. InnoDB has been very robust and I have only once come
Alvaro,
- Original Message -
From: Alvaro Avello [EMAIL PROTECTED]
To: Heikki Tuuri [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: Tuesday, July 15, 2003 1:13 AM
Subject: Re: innodb file won't shrink
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There 's any
Walt,
- Original Message -
From: walt [EMAIL PROTECTED]
To: Heikki Tuuri [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Monday, July 14, 2003 11:56 PM
Subject: Re: innodb file won't shrink
Heikki Tuuri wrote:
On September 15th, 2003 you will be able to put every InnoDB table
PROTECTED]; [EMAIL PROTECTED]
|Sent: Tuesday, July 15, 2003 1:13 AM
|Subject: Re: innodb file won't shrink
|
|
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|There 's any chance that in the future every InnoDB table files from a
|determinated database can be placed in the same directory of the mysql
Alvaro,
- Original Message -
From: Alvaro Avello [EMAIL PROTECTED]
To: Heikki Tuuri [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Tuesday, July 15, 2003 11:38 PM
Subject: Re: innodb file won't shrink
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Hash: SHA1
Sorry HeikkiCan you give me
Heikki Tuuri wrote:
On September 15th, 2003 you will be able to put every InnoDB table into its
own file. That should alleviate this kind of problem.
Best regards,
Heikki Tuuri
Innobase Oy
http://www.innodb.com
Transactions, foreign keys, and a hot backup tool for MySQL
Order
Steve,
- Original Message -
From: Steve [EMAIL PROTECTED]
Newsgroups: mailing.database.mysql
Sent: Thursday, July 10, 2003 11:24 PM
Subject: Re: innodb file won't shrink
I found the following thread:
http://groups.google.com/groups?threadm=9dpadc%2412ag%241
Hi Mysql fans ;-),
does anybody know how to initialize a new added Innodb file without restarting
the server ?
Best regards
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Valentin Nils
Internet Technology
E-Mail: [EMAIL PROTECTED]
URL: http://www.knowd.co.jp
Personal URL: http://www.knowd.co.jp/staff/nils
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Nils Valentin [EMAIL PROTECTED] wrote:
does anybody know how to initialize a new added Innodb file without restarting
the server ?
You can't.
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Hi Egor,
Thanks for the straight and short answer.
Much appreciated.
Best regards
Nils Valentin
Tokyo/Japan
2003 7 2 17:44Egor Egorov :
Nils Valentin [EMAIL PROTECTED] wrote:
does anybody know how to initialize a new added Innodb file without
restarting the server ?
You can't
When should I use the autoextend option for the InnoDB file...Even after emptying the
tables the files keeps its size and for new insertions it gets even bigger instead of
using the already allocated space(which I suppose should be available after emptyibg
the tables).
thank you friends
aik_b
I.-A.,
- Original Message -
From: I-A.Kotopoulos [EMAIL PROTECTED]
Newsgroups: mailing.database.mysql
Sent: Wednesday, June 25, 2003 10:05 AM
Subject: InnoDB file...
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I am currently working on some experiments and have to deal with some millions of
tuples. As you can imagine indexing is essentiall. However My InnoDB file has grown to
over 3.6G and fragmentation is sometimes a big problem. Additionally the file keeps
its size even after dropping the 'big
that helps.
Edward Dudlik
Becoming Digital
www.becomingdigital.com
- Original Message -
From: I-A.Kotopoulos [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Friday, 20 June, 2003 04:36
Subject: InnoDB file size...
I am currently working on some experiments and have to deal
all the filesystem in a another computer, beeing the root
filesystem. So this computer is now a copy of the developpment computer,
but without dirty things.
7) Everything works well, the second Innodb file is created. Except at the
moment of accessing to the database, where I have this kind
On Wed, May 01, 2002 at 04:10:38PM +0200, Svend Erik H. Jørgensen wrote:
Some how i have manged to delete a database, i'm not quite sure how.
When i try to create the table's i get an error :
020501 15:08:38 InnoDB: Error: table noah/user already exists in InnoDB
internal
InnoDB: data
Hi
Some how i have manged to delete a database, i'm not quite sure how.
When i try to create the table's i get an error :
020501 15:08:38 InnoDB: Error: table noah/user already exists in InnoDB
internal
InnoDB: data dictionary. Have you deleted the .frm file
InnoDB: and not used DROP TABLE?
://www.mysql.com
-Original Message-
From: Gurupartap Davis [EMAIL PROTECTED]
To: Heikki Tuuri [EMAIL PROTECTED]; [EMAIL PROTECTED]
[EMAIL PROTECTED]
Date: Saturday, February 09, 2002 2:32 AM
Subject: Re: InnoDB File Size
Yes, I saw that before...My filesize was limited to 2GB before, but now
Yes, I saw that before...My filesize was limited to 2GB before, but now with
a 2.4 kernel and reiserfs I _should_ be allowed to create a 20GB data file
now, right?
So something's wrong... as I said before, I have successfully created a 9GB
file on this machine before, so the filesystem isn't to
Hi!
From http://www.innodb.com/ibman.html :
MySQL/InnoDB-3.23.44, November 2, 2001
You can define foreign key constraints on InnoDB tables. An example: FOREIGN
KEY (col1) REFERENCES table2(col2).
You can create 4 GB data files in those file systems that allow it.
Thus 4 G files
://www.mysql.com
-Original Message-
From: Gurupartap Davis [EMAIL PROTECTED]
To: Heikki Tuuri [EMAIL PROTECTED]; [EMAIL PROTECTED]
[EMAIL PROTECTED]
Date: Saturday, February 09, 2002 2:32 AM
Subject: Re: InnoDB File Size
Yes, I saw that before...My filesize was limited to 2GB before, but now
Yes, I saw that before...My filesize was limited to 2GB before, but now with
a 2.4 kernel and reiserfs I _should_ be allowed to create a 20GB data file
now, right?
So something's wrong... as I said before, I have successfully created a 9GB
file on this machine before, so the filesystem isn't to
On Friday 08 February 2002 16:32, Gurupartap Davis wrote:
Yes, I saw that before...My filesize was limited to 2GB before, but now
with a 2.4 kernel and reiserfs I _should_ be allowed to create a 20GB
data file now, right?
So something's wrong... as I said before, I have successfully created
Hi!
From http://www.innodb.com/ibman.html :
MySQL/InnoDB-3.23.44, November 2, 2001
You can define foreign key constraints on InnoDB tables. An example: FOREIGN
KEY (col1) REFERENCES table2(col2).
You can create 4 GB data files in those file systems that allow it.
Thus 4 G files
I'm using MySQL 4.0, trying to set up some innodb tables with several 20GB
data files,
but mysql is telling me that the files must be = 4096MB
This is on a RedHat 7.2 box with redhat's 2.4.9-13 enterprise kernel on a
reiserfs filesystem...
I don't think there should be such a low limit...I
I have the following settings in /etc/my.cnf:
default-table-type=innodb
innodb_data_file_path = ibdata1:1000M
innodb_data_home_dir = /var/lib/mysql/
innodb_log_group_home_dir = /var/lib/mysql/
innodb_log_arch_dir = /var/lib/mysql/
set-variable = innodb_mirrored_log_groups=1
set-variable =
In the last episode (Nov 02), Stephen Lee said:
I have the following settings in /etc/my.cnf:
default-table-type=innodb
innodb_data_file_path = ibdata1:1000M
set-variable = innodb_log_file_size=5M
The resulting files:
-rw-rw1 mysqlmysql2560 Nov 2 12:17
In the last episode (Nov 02), Stephen Lee said:
I have the following settings in /etc/my.cnf:
default-table-type=innodb
innodb_data_file_path = ibdata1:1000M
set-variable = innodb_log_file_size=5M
The resulting files:
-rw-rw1 mysqlmysql2560 Nov 2 12:17
Hello!
Is there any way to know how much space is used in the innodb data files?
So if I have for example :
innodb_data_file_path = ibdata1:200M;ibdata2:400M;
how much of the 600MB actually is used at the moment
Thx!
Elm
database,sql,query,table
Hi,
how much of the 600MB actually is used at the moment
I'm sure there'a a better way to do it, but this one works:
mysql show table status like 'your_innodb_table' \G
...
Comment: InnoDB free: 3739648 kB
Best Regards,
Sasa
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