Charmed MySQL Reference - Profiles

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Profiles

Warning: The feature is currently available in the channel 8.0/candidate only (revision 186+) and will be released to the channel 8.0/stable soon.

Charmed MySQL resource utilization depends on the chosen profile:

juju deploy mysql --config profile=testing

Profile values

Value Description Tech details
production
(default)		 Maximum performance ~75% of unit memory granted for MySQL
max_connections=RAM/12MiB (max safe value)
testing Minimal resource usage innodb_buffer_pool_size = 20MB
innodb_buffer_pool_chunk_size=1MB
group_replication_message_cache_size=128MB
max_connections=100
performance-schema-instrument=‘memory/%=OFF’

Config change

:warning: Note: Pre-deployed application profile change is planned but currently is NOT supported.

To change the profile, use juju config (see all charm configs):

juju deploy mysql --config profile=testing && \
juju config mysql profile=production

Juju Constraints

Juju constraints allows RAM/CPU limits for Juju units:

juju deploy mysql --constraints cores=8 mem=16G

Juju constraints can be used together with charm profile:

juju deploy mysql --constraints cores=8 mem=16G --config profile=testing