Difference Between InnoDB and MyISAM

If we talk about the most commonly used storage engines in MySQL, both InnoDB and MyISAM would be the leading ones in the list. Whereas both storage engines have their own set of advantages and disadvantages for a specific application, we will further discuss here the basic difference between InnoDB and MyISAM further down here which can be extremely crucial for many MySQL interview questions. While the basic difference between InnoDB and MyISAM is, InnoDB supports advanced transaction process and MyISAM doesn’t. There are several other difference you may not be aware of which we are going to describe further here.

InnoDBMyISAM
InnoDB is an ACID-compliantstorage engine dedicated for MySQL that has user data protectioncapabilities such as rollback, commit and crash recovery.Mostly used in data warehousing, web, and other application environment, MyISAMsupports all MySQL configurations. It’s the default storage engine to all my MySQL versions prior to 5.5.5.
InnoDB doesn’t have FULLTEXT indexsupport.MyISAMhas a FULLTEXT index and compressed read-onlystorage support.
InnoDB doesn’t save data as table data, so the select count (*)implementation from the table in InnoDB will scan the entire table again to exactly calculate the number of rows.This storage engine saves data as table level, so MyISAM reads out therow number.
Tables here have AUTO_INCREMENT as of index part.It has the capability to set up join index and various fields together.
The re-establish of deleted table data using InnoDB is not possible.Deleted table data re-establishment here is possible.
Masteroperations’ load table doesn’t work here.To load the tablefrom master operations, we have to first import data into a MyISAMtable and then import the required data into InnoDB table, but foreign keys will not be applicable here.
Row-levellocking is supported with InnoDB, that’s why the whole table will not be locked down by operations. But, tables at InnoDB are not perfect for row-levellocking.Table level locking is supported with MyISAM. With this feature, users can lock the whole table when performing the implementation of any SQL statements
We will get foreign key and transaction processing support with InnoDB.MyISAM doesn’t support either transaction processing or foreign key
As InnoDB is large, it has index and data closely tiedbut compression is not used here.In MyISAM, data and indexes stay separated. The index is compressed here.
It offers optimal crash recovery option.It offers a moderatecrash recovery option.
Get support for FULLTEXT Search indexesonly after InnoDB version 5.6.Get FULLTEXT Search supportfrom the very beginning.
InnoDB supports ACID properties.With MyISAM, you will not receive support for ACID properties
With the help of a file system snapshot, we can take a backup of InnoDB tables.Mysql dump will be required here to create a backup of MyISAM tables
Transaction by tables is supported here.MyISAM doesn’t support transaction by transaction by tables.
The performance is less here compares to MyISAM.Performance speed is better here compared to InnoDB.
InnoDB stores data in files names tablespaceIt stores data and indexes in two files, .MYI and .MYD.
Built on clustered indexes and uses MVCC to offer high concurrency, which ensures fast primary key lookups.It doesn’t support FK constraints or transactions.
It’s completely crash-safe.Absolutely not crash-safe.
Offers fast repairs to users.Users will receive slow repair and recovering complete data might not be possible here.

Users have to choose storage engine as per their application need because both InnoDB and MyISAM have their own set of advantages and disadvantages. Browse our website Best Interview Questions to check a number of MySQL interview questions. Pay a visit today and practice for guaranteed interview success.

Leave a Reply

Your email address will not be published. Required fields are marked *