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1answer
21 views

How do I create fractal index using tokudb engine?

I install MariaDb and configured it to use TokuDb Engine. I need to use Fractal-Index Built-in on TokuDb Engine. I have create my index as follow: ALTER TABLE `table__name` ADD INDEX ( `column` ); ...
1
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1answer
29 views

How to export mysql databases with different ENGINE?

I'm setting up MySQL Cluster. As it uses ENGINE=NDBCLUSTER, how could I export my databases from MySQL Server specifying the ENGINE? Is there a way to do this? All my tables are MYISAM
1
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1answer
48 views

Fastest engine for Mass Updates (only updates done on table)

I have a table of 2 columns and 60 million rows. I want to update the table by incrementing one field by 1 on various different rows (This is the only type of operation that will ever be done on the ...
1
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1answer
33 views

How Much Resources Does the BLACKHOLE Storage Engine Consume?

I'm going to add a MySQL Relay Slave which use BLACKHOLE Storage Engine. The relay slave will just filter some databases binlog to downstream slave. Our MySQL Master generates about 15G a day in ...
5
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1answer
305 views

Is it Possible to Recover Data from a BLACKHOLE table? [closed]

I had created table with engine BLACKHOLE basically the BLACKHOLE storage engine acts as a “black hole” that accepts data but throws it away and does not store it. Retrievals always return an empty ...
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0answers
84 views

Cluster with shared storage

I actually use MariaDB Galera Cluster with 3 master nods. Workload is about 70% read, 30% write and it's very important to have consistent data with every select - this is why I choose Galera ...
0
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2answers
381 views

Is there a way to enable MariaDB MEMORY storage engine for every table?

I am new to MariaDB and interested in using it because I want to use MEMORY storage engine for every table. I read MEMORY storage engine on mariadb.com and it seems like I had to specify storage ...
1
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1answer
107 views

InnoDB to MyISAM Conversion Problem

I have a dedicated server based on CentOS 5 OS , mysql 5 and phpmyadmin I was trying to convert all database tables from InnoDB to MYISAM. I tried to do it by setting in /etc/my.cnf file the value ...
0
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1answer
63 views

Aria engine - changing block size

It's possible to change aria_block_size from default 8192 without recreating tables? I want try 1024 or 2048 but after change in my.cnf and restart mariadb I got this errors on aria tables: #138 - ...
1
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1answer
69 views

Where Mysqldump gets data from

How mysqldump is processing backup? From which all files is it reads data for creating dump? Is the process differs if storage engines are different?
0
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2answers
496 views

Inserting into mysql table with archive engine “duplicate key” error

I am trying to archive some files using mysql archive engine. I am using this query to insert file contents: insert into test_table (id,arch) values (123,'FILE_CONTENT') After inserting 2 records, ...
1
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1answer
284 views

TokuDB database size unknown in phpmyadmin

In mysql server, I installed the TokuDB storage engine. I converted database engine InnoDB to TokuDB, but my table sizes show unknown in phpmyadmin.
3
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1answer
445 views

How to convert innodb engine tables to tokudb engine

Hi I want to migarate my server newly installed tokudb engine. i want to convert each table of database from innodb to tokudb. How can I do that using sed command ?
3
votes
2answers
562 views

Question about non-clustered index storage in SQL Server

I have a table people with two non-clustered indexes. create table people( id_person int, first_name varchar(50), last_name varchar(50), city varchar(100), state char(2), zip_code int ) CREATE ...
0
votes
1answer
259 views

Mysql federated engine table creation error

I am trying to create a federated table on my local machine which suppose to connect to my another machine which also in my local network. I have enabled federated engine on both machines and is shown ...
1
vote
1answer
473 views

Unknown storage engine 'XtraDB'

I installed Percona Server 5.6.12-rc60.4, when I want create table such as : CREATE TABLE IF NOT EXISTS `mydb`.`table` ( `id` INT NOT NULL AUTO_INCREMENT , `title` VARCHAR( 64 ) NOT NULL , PRIMARY ...
1
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2answers
116 views

Which MySQL engine should i use where most operations are read operations

I want to develop an application for which i will need a database to store data. I am using MySQL as backend. My question is Which MySQL engine should i use? Well, i have mentioned some important ...
1
vote
1answer
462 views

Does SQL Server check disk space before allocating a new page?

I have a bet with my old boss. I bet her that SQL Server, when allocating a new extent, always allocates from the buffer pool and never checks to see whether there is some place on disk where the ...
1
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1answer
261 views

Issues converting MyISAM table to InnoDB (auto column issue)

I'm having issues trying to convert a table from MyISAM to InnoDB in MySQL 5.6. The following is the table dump: -- -- Table structure for table `companies` -- DROP TABLE IF EXISTS `companies`; ...
1
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1answer
333 views

Is there a query to set a table's engine to innodb if it's not already?

I can set a (MyISAM) table's engine to InnoDB using the query: alter table tablename engine=InnoDB which takes some time to complete for large tables. It appears though that if I run the same query ...
1
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1answer
111 views

Issue with Storage Engine

Just got the below error in one of the slave. I just Googled it and changed the variable myisam_data_pointer_size from 4 to 6. Somehow, my ALTER TABLE was successful. Can you please let me know ...
2
votes
1answer
250 views

Is the Memory engine adequate for a read intensive/lookup table?

I have an InnoDB table with just two columns, a VARCHAR(20) and a DATETIME, and around 4M rows. This table serves as a blacklist for other tables, and is truncated and recreated from a csv file from ...
3
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1answer
191 views

Which MySQL table to use for read-only, bulk-loaded tables?

So I have a workload on 2 key tables in my application with the following characteristics: READ-ONLY DATA The data is bulk-loaded in a fully consistent manner from a single process on a schedule, ...
1
vote
1answer
363 views

Can I use symlink or data directory for ARCHIVE MySQL tables?

All mention of either using a symlink or data/index separate data directories state that MyISAM is the only supported (https://dev.mysql.com/doc/refman/5.5/en/symbolic-links.html). However, I found ...
0
votes
2answers
281 views

Best MySQL storage engine for read heavy table with two indexes

I have a pretty big MySQL table (70G) with about 15 columns and 1.5M rows. There is one index on the autoincrement id and one on a foreign key (integer). Apart from that there are several VARCHAR and ...
4
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1answer
194 views

Which MySQL storage engine is the most similar to ARCHIVE when that is not available?

I have a table that contains a log of events that is written to often and read very infrequently by comparison. I would love to use the ARCHIVE engine, because it is basically designed for exactly ...
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3answers
3k views

Is MariaDB a suitable drop in replacement for MySQL on a standard LAMP stack?

I've been wondering lately what (if any) are the improvements available in MariaDB over 'conventional' MySQL? I understand that where platform interoperability and/or backwards compatibility may be ...
1
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1answer
231 views

What storage engine should I use for this MySQL table?

I have a table where I store all the urls from my website, and I update them from time to time when a visitor enters. The primary key is the url itself varchar(255). I have set it to use InnoDB but ...
1
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1answer
4k views

Do you still use MyISAM or prefer Aria storage engine?

If Aria storage engine (previously called Maria) is the "new" MyISAM, which supports transaction and automatic crash recovery: Why still use MyISAM ? Should changing storage engine from MyISAM to ...
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3answers
39k views

Which is faster, InnoDB or MyISAM?

How can MyISAM be "faster" than InnoDB if MyISAM needs to do disk reads for the data? InnoDB uses the buffer pool for indexes and data, and MyISAM just for the index?
4
votes
1answer
946 views

Which mysql storage engine to choose?

I'm confused about which mysql engine should I choose (lets talk about the most used : MyISAM and InnoDB). The theories say: Both work with BTree indexes, but MyISAM can work with FULLTEXT index ...
1
vote
1answer
438 views

How is it possible for mysql storage engine to be NULL?

I'm just reading a book and in one of the examples I get notices: That the engine in the information_schema.table is null, how is that possible? Can I create tables without any engine??, is there ...
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1answer
609 views

Slot Array and Total Page Size

I continue to read in many forums and on many blogs that a page is comprised as shown below: Page Size: 16 x 512B = 8192B Page Header: = 96B Maximum In_Row Row: = 8060B This leaves ...
4
votes
1answer
130 views

Why does my heap not fill its pages completely while an identical clustered index can fill to m_freeCnt = 0?

-- Example 1: With Clustered Index CREATE TABLE tbl5 ( i VARCHAR(900) NOT NULL ) ; GO CREATE CLUSTERED INDEX CIX_tbl5 ON tbl5 (i ASC) ; GO INSERT INTO tbl5 ( i ) VALUES ...
2
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1answer
2k views

Any disadvantages to enabling federated storage engine?

We've encountered a couple use cases where having federated tables prove useful, despite their limitations and caveats. As best I can tell this must be enabled with a federated declaration in the ...
2
votes
2answers
734 views

Which first: upgrade mysql version or convert storage engine?

I inherited a production mysql server at 5.0. It uses MyISAM exclusively. It is not a high volume database but it does have some large datasets. I am planning on: upgrading to 5.5 converting ...
2
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2answers
499 views

Any problem will all InnoDB and one MyISAM table?

I have a MySQL 5.5 DB with all InnoDB tables. For some reason, one of the developers decided to create a MyISAM table. It is a log table for user sessions. I don't see why we should mix in a MyISAM ...
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4answers
8k views

How to Add Federated engine after installing Mysql

I have Mysql 5.5.18 and upon show engines: show engines; +--------------------+---------+------------------------------------------------------------+--------------+------+------------+ | Engine ...
3
votes
1answer
471 views

MySQL query 'going away' on executing INSERT ON DUPLICATE UPDATE statement with a 12524 character blob

I have a mysql insert on update query like so insert into table (col1, col2, col3) values (1,2,'huge blob with 12524 chars') on duplicate key update col3 = 'huge blob with 12524 chars'; col1, col2 ...
4
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2answers
1k views

What storage engines work with Oracle?

http://en.wikipedia.org/wiki/Database_engine mentions about database engines aka storage engines. What all storage engines can be used with the Oracle database?
3
votes
2answers
653 views

Should I move to InnoDB during a planned migration?

I'm shortly migrating a Debian Lenny webserver to another host and Debian Squeeze. The standard MySQL installation even on Squeeze is 5.1 and therefore would default to MyISAM - I'm inclined to stick ...
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votes
3answers
1k views

I am using the MEMORY storage engine but MySQL still writes to my disk…Why?

I am using the MEMORY Engine for all tables associated with a particular MYSQL query because speed of access is paramount to my project. For some reason, I have noticed that a large amount of disk ...
13
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3answers
7k views

What are reasons *not* to use the MEMORY storage engine in MySQL?

I recently discovered that MySQL has a "memory" engine that I wasn't aware of (most of my database work is for hobby projects so I learn what I need as I go). It seems like this option should give me ...
13
votes
3answers
4k views

Is it common practice to mix InnoDB and MyISAM tables on same server?

I've got a single database of about 4.5GB running on a server with 8GB RAM. The vast majority of the tables are MyIsam (about 4.3GB), but I'm soon going to be converting some of them to InnoDB. (It's ...
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votes
3answers
1k views

Speeding up conversion of MyISAM to InnoDB

I've got a mysql 5.1 server with a database of approximately 450 tables, taking up 4GB . The vast majority of these tables (all but 2) are MyIsam. This has been fine for the most part (don't need ...
5
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1answer
206 views

What are the pros and cons of using the Sphinx Storage Engine?

What are the pros/cons of using the Sphinx Storage Engine in MySQL (doc) over the normal api?