Which myisamchk variable represents the size of buffer used to hold index blocks?

Solution (By Examveda Team)

This question asks about the MyISAM storage engine in MySQL. MyISAM is an older storage engine, known for its speed in read operations. It uses indexes to quickly find specific data within your database.
Let's break down the options:
A) key_buffer_size: This variable controls the size of the buffer used to hold MyISAM indexes. This means it directly affects how quickly your database can find data using indexes.
B) read_buffer_size: This variable controls the size of the buffer used for reading data from tables. It's not directly related to indexes.
C) sort_buffer_size: This variable controls the size of the buffer used during sorting operations, such as when creating indexes. It's not the primary buffer for holding indexes.
D) write_buffer_size: This variable controls the size of the buffer used for writing data to tables. It's not directly related to indexes.
Therefore, the correct answer is A) key_buffer_size. This variable is the primary buffer for MyISAM indexes.