Home 2015 November MySQL: Script to determine the size of innodb_buffer_pool_size

MySQL: Script to determine the size of innodb_buffer_pool_size

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In this post, I am providing a script for determining the size of innodb_buffer_pool_size in MySQL Server.

The Buffer pool is essential for the InnoDB engine because InnoDB maintains the storage area for caching data and indexes in memory.

I have a rough figure like, if you have 3 GB of InnoDB data and indexes, you require at least 1 GB size of innodb_buffer_pool_size.

Below is a script to calculate the size for InnoDB buffer pool.

After executing above statement, You will get one RIBPS value. e.g. result in 2 RIBPS, so you require 2 GB size of the buffer pool.
You can change this parameter in the config file and restart your MySQL Service.

InnoDB reserves additional memory for buffers and control the structures, so that the total allocated space is approximately 10% greater than the specified size.

Anvesh Patel
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Comments: 8
  1. meagan
    December 6, 2015 at 8:18 pm

    You really make it seem so easy with your presentation but I find this topic to be actually something
    which I think I would never understand. It seems too
    complicated annd very broad for me. I’m looking forward for ypur next post,
    I will try to get thhe hang of it!

  2. Jas
    December 15, 2015 at 9:57 pm

    Howdy! This post couldn’t be written any better!
    Looking through this post reminds me of my previous roommate!
    He continually kept talking about this. I’ll send thus information to him.
    Fairly certain he’ll have a great read. Thank you for sharing!

  3. Jenny
    December 28, 2015 at 7:36 pm

    This is one awesome article post. Really Great.

  4. faye valentine
    December 29, 2015 at 9:13 pm

    Im grateful for the blog post.Thanks Again. Really Cool.

  5. Camery
    February 25, 2016 at 8:13 am

    magnificent post, very informative. I wonder why the other experts of this sector don’t notice this. You should continue your writing. I’m sure, you’ve a great readers’ base already!

  6. Rutha
    March 3, 2016 at 9:28 am

    Major thanks for the post.Really looking forward to read more. Really Cool.

  7. Urfer
    March 30, 2016 at 8:35 pm

    Very informative article post. Really Great.

  8. Badal Singh Dudy
    March 2, 2020 at 8:00 am

    Hello Anvesh,

    I check this script on my production environment but its showing some unexpected answer

    Script output:-
    SELECT CEILING(Total_InnoDB_Bytes*1.6/POWER(1024,3)) AS RIBPS FROM( SELECT SUM(data_length+index_length) Total_InnoDB_Bytes FROM information_schema.tables WHERE engine=’InnoDB’) AS T;
    +——-+
    | RIBPS |
    +——-+
    | 163 |
    +——-+
    1 row in set (8.42 sec)

    Current environment:-
    buffer_pool_size is 4 GB total memory size is 11 GB

    Total DB size is 105 GB.

    Please let me know don i miss something???
    buffer pool size is 4 GB total memory size is 11 GB

Anvesh Patel
Anvesh Patel

Database Engineer

November 29, 2015 MySQL, MySQL DBA Script, , , , , , , , , , , , , , ,