mailcow-dockerized/data/conf/mysql/my.cnf

[mysqld]
character-set-client-handshake = FALSE
character-set-server           = utf8mb4
collation-server               = utf8mb4_unicode_ci
#innodb_file_per_table          = TRUE
#innodb_file_format             = barracuda
#innodb_large_prefix            = TRUE
#sql_mode=IGNORE_SPACE,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
max_allowed_packet      = 192M
max-connections         = 550
key_buffer_size         = 0
read_buffer_size        = 192K
sort_buffer_size        = 2M
innodb_buffer_pool_size = 24M
read_rnd_buffer_size    = 256K
tmp_table_size          = 24M
performance_schema      = 0
innodb-strict-mode      = 0
thread_cache_size       = 8
query_cache_type        = 0
query_cache_size        = 0
max_heap_table_size     = 48M
thread_stack            = 128K
skip-host-cache
skip-name-resolve
log-warnings            = 0
event_scheduler         = 1
interactive_timeout     = 3610
wait_timeout            = 3610

[client]
default-character-set = utf8mb4

[mysql]
default-character-set = utf8mb4