Check mysql-innodb-buffer-pool-instances
Overview
Checks the InnoDB buffer pool instance configuration in MySQL/MariaDB. Logic is taken from MySQLTuner script:mysql_innodb(), v1.9.8.
Hints:
MariaDB: Applies only to versions < 10.5.1.
On RHEL 7+, one way to install the Python MySQL Connector is via
pip install pymysql
Compared to check_mysql / MySQLTuner this check currently:
supports only simple login with username/password (not via SSL/TLS)
does not support a connection via socket
Fact Sheet
Check Plugin Download |
|
Check Interval Recommendation |
Once a day |
Can be called without parameters |
Yes |
Available for |
Python 3, Windows |
Requirements |
Python module |
Help
usage: mysql-innodb-buffer-pool-instances [-h] [-V] [--always-ok]
[-H HOSTNAME] [-p PASSWORD]
[--port PORT] [-u USERNAME]
Checks the InnoDB buffer pool instance configuration in MySQL/MariaDB.
options:
-h, --help show this help message and exit
-V, --version show program's version number and exit
--always-ok Always returns OK.
-H HOSTNAME, --hostname HOSTNAME
MySQL/MariaDB hostname. Default: 127.0.0.1
-p PASSWORD, --password PASSWORD
Use the indicated password to authenticate the
connection. Default:
--port PORT MySQL/MariaDB port. Default: 3306
-u USERNAME, --username USERNAME
MySQL/MariaDB username. Default: root
Usage Examples
./mysql-innodb-buffer-pool-instances --hostname localhost --username root --password mypassword
Output:
8 InnoDB buffer pool instances. innodb_buffer_pool_size <= 1G and innodb_buffer_pool_instances !=1 [WARNING]. Set innodb_buffer_pool_instances to 1.
States
WARN if
innodb_buffer_pool_instances
> 64.WARN if
innodb_buffer_pool_size
> 1 GB andinnodb_buffer_pool_instances
<>min(innodb_buffer_pool_size in GB, 64 GB)
.WARN if
innodb_buffer_pool_size
<= 1 GB andinnodb_buffer_pool_instances
<> 1.
Perfdata / Metrics
Name |
Type |
Description |
---|---|---|
mysql_innodb_buffer_pool_instances |
Number |
If innodb_buffer_pool_size is set to more than 1GB, innodb_buffer_pool_instances divides the InnoDB buffer pool into this many instances. |
mysql_innodb_buffer_pool_size |
Bytes |
InnoDB buffer pool size in bytes. The primary value to adjust on a database server with entirely/primarily InnoDB tables, can be set up to 80% of the total memory in these environments. |
Credits, License
Authors: Linuxfabrik GmbH, Zurich
License: The Unlicense, see LICENSE file.
Credits:
heavily inspired by MySQLTuner (https://github.com/major/MySQLTuner-perl)