Debug Your Infrastructure

Get Instant Solutions for Kubernetes, Databases, Docker and more

AWS CloudWatch
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Pod Stuck in CrashLoopBackOff
Database connection timeout
Docker Container won't Start
Kubernetes ingress not working
Redis connection refused
CI/CD pipeline failing

MySQL InnoDB Buffer Pool Issues

Inefficient use of the InnoDB buffer pool, leading to high disk I/O because of frequent page swapping.
  1. Check InnoDB Buffer Pool Usage:


- Run the following query to check the buffer pool usage:
SHOW ENGINE INNODB STATUS\G
Look for the section `BUFFER POOL AND MEMORY`. Review the `Buffer pool size` vs. `Database size` and `Free buffers`.

  1. Monitor Page Reads:


- Identify if the buffer pool is too small by monitoring page reads:
SHOW GLOBAL STATUS LIKE 'Innodbbufferpool_reads';
A high value indicates many reads from disk, suggesting the buffer pool may be too small.

  1. Adjust Buffer Pool Size:


- If the buffer pool is determined to be too small, increase its size by modifying the `innodbbufferpool_size` parameter in the MySQL configuration file (`my.cnf` or `my.ini`), then restart the MySQL server. The size should be up to 70-80% of available memory on a dedicated database server.
Example:
[mysqld]
innodb
bufferpool_size=8G
Adjust `8G` to your calculated optimal size.

  1. Enable InnoDB Buffer Pool Instances:


- If not already enabled and you have a multi-core system, set `innodbbufferpool_instances` to a value up to the number of CPU cores (but not more than the buffer pool size divided by 1GB). This can be done in the MySQL configuration file and requires a server restart.
Example:
[mysqld]
innodb
bufferpool_instances=8

  1. Check for Swapping:


- If your system is swapping, it can severely affect MySQL performance. Use `vmstat` or `top` to check for swap usage. Reducing the `innodbbufferpool_size` may help if swapping is an issue.

  1. Flush Buffer Pool:


- If you suspect the buffer pool contains a lot of dirty pages, consider flushing them. This can be done without restarting MySQL:
SET GLOBAL innodbbufferpooldumpnow = ON;
SET GLOBAL innodb
bufferpooldumppct = 100;
SET GLOBAL innodb
bufferpooldumpat_shutdown = ON;

  1. Review and Optimize Queries:


- Use the `slowquerylog` to identify slow queries that might be causing excessive buffer pool usage. Optimize these queries to reduce load.

  1. Check Table Size:


- Large tables can affect buffer pool efficiency. Check the size of your tables:
SELECT tableschema AS `Database`, tablename AS `Table`,
round(((data
length + indexlength) / 1024 / 1024), 2) `Size in MB`
FROM information_schema.TABLES
ORDER BY (data
length + indexlength) DESC;

  1. Monitor Row Lock Waits:


- High row lock waits can indicate contention that affects buffer pool usage. Monitor this with:
SHOW STATUS LIKE 'Innodbrowlock%';

  1. Evaluate and Add More RAM:


- If adjustments to `innodbbufferpool_size` and optimizations do not alleviate the issues, and your server has the capacity for more physical RAM, consider upgrading the hardware to allow for a larger buffer pool.

Master 

MySQL

 debugging in Minutes

— Grab the Ultimate Cheatsheet

(Perfect for DevOps & SREs)

Most-used commands
Real-world configs/examples
Handy troubleshooting shortcuts
Your email is safe with us. No spam, ever.

Thankyou for your submission

We have sent the cheatsheet on your email!
Oops! Something went wrong while submitting the form.

MySQL

Cheatsheet

(Perfect for DevOps & SREs)

Most-used commands
Your email is safe thing.

Thankyou for your submission

We have sent the cheatsheet on your email!
Oops! Something went wrong while submitting the form.

MORE ISSUES

Deep Sea Tech Inc. — Made with ❤️ in Bangalore & San Francisco 🏢

Doctor Droid

Debug Your Infrastructure

Get Instant Solutions for Kubernetes, Databases, Docker and more

AWS CloudWatch
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Pod Stuck in CrashLoopBackOff
Database connection timeout
Docker Container won't Start
Kubernetes ingress not working
Redis connection refused
CI/CD pipeline failing

Heading

This is some text inside of a div block.

Heading 1

Heading 2

Heading 3

Heading 4

Heading 5
Heading 6

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

Block quote

Ordered list

  1. Item 1
  2. Item 2
  3. Item 3

Unordered list

  • Item A
  • Item B
  • Item C

Text link

Bold text

Emphasis

Superscript

Subscript

Master 

Heading

 debugging in Minutes

— Grab the Ultimate Cheatsheet

(Perfect for DevOps & SREs)

Most-used commands
Real-world configs/examples
Handy troubleshooting shortcuts
Your email is safe with us. No spam, ever.

Thankyou for your submission

We have sent the cheatsheet on your email!
Oops! Something went wrong while submitting the form.

Heading

Cheatsheet

(Perfect for DevOps & SREs)

Most-used commands
Your email is safe thing.

Thankyou for your submission

We have sent the cheatsheet on your email!
Oops! Something went wrong while submitting the form.

MORE ISSUES

No items found.
Deep Sea Tech Inc. — Made with ❤️ in Bangalore & San Francisco 🏢

Doctor Droid