Add MySQL 8 default values. Plus some other (optional) changes/improvements

low-memory-my.cnf

@@ -1,5 +1,5 @@
 # For advice on how to change settings please see
-# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
+# http://dev.mysql.com/doc/refman/8.0/en/server-configuration-defaults.html
 
 [mysqld]
 #
@@ -31,34 +31,40 @@ log-error=/var/log/mysqld.log
 pid-file=/var/run/mysqld/mysqld.pid
 
 
-#### These optimize the memory use of MySQL
+#### Reduces the memory usage of MySQL by setting values to their minimum
 #### http://www.tocker.ca/2014/03/10/configuring-mysql-to-use-minimal-memory.html
-innodb_buffer_pool_size=5M
-innodb_log_buffer_size=256K
-query_cache_size=0
-max_connections=10
-key_buffer_size=8
-thread_cache_size=0
-host_cache_size=0
-innodb_ft_cache_size=1600000
-innodb_ft_total_cache_size=32000000
 
-# per thread or per operation settings
-thread_stack=131072
-sort_buffer_size=32K
-read_buffer_size=8200
-read_rnd_buffer_size=8200
-max_heap_table_size=16K
-tmp_table_size=1K
-bulk_insert_buffer_size=0
-join_buffer_size=128
-net_buffer_length=1K
-innodb_sort_buffer_size=64K
+#### Tip: Doing this is hacky. Optimizing values will result in better performance.
+#### If you have time consider a script like MySQLTuner to start learning about optimization 
+#### See: https://github.com/major/MySQLTuner-perl. [ And change: performance_schema = on ]
 
-#settings that relate to the binary log (if enabled)
-binlog_cache_size=4K
-binlog_stmt_cache_size=4K
+## Global values
+innodb_buffer_pool_size=5M          #MySQL 8 default: 134217728 (128M)
+innodb_log_buffer_size=256K         #MySQL 8 default: 16777216 (16M)
+query_cache_size=0                  #MySQL 8 default: REMOVED in 8. Deprecated in MySQL 5.7.20
+max_connections=10                  #MySQL 8 default: 151
+key_buffer_size=8                   #MySQL 8 default: 8388608 (8M)
+thread_cache_size=0                 #MySQL 8 default: (autosized)
+host_cache_size=0                   #MySQL 8 default: (autosized)
+innodb_ft_cache_size=1600000        #MySQL 8 default: 8000000
+innodb_ft_total_cache_size=32000000 #MySQL 8 default: 640000000
 
-#### from https://mariadb.com/de/node/579
+## Per thread or per operation values
+thread_stack=131072                 #MySQL 8 default: 1048576 (1M) Default increased in MySQL 8.0.27 by 4x
+sort_buffer_size=32K                #MySQL 8 default: 262144 (256K)
+read_buffer_size=8200               #MySQL 8 default: 131072 (128K)
+read_rnd_buffer_size=8200           #MySQL 8 default: 262144 (256K)
+max_heap_table_size=16K             #MySQL 8 default: 16777216 (16M)
+tmp_table_size=1K                   #MySQL 8 default: 16777216 (16M)
+bulk_insert_buffer_size=0           #MySQL 8 default: 8388608 (8M)
+join_buffer_size=128                #MySQL 8 default: 262144 (256K)
+net_buffer_length=1K                #MySQL 8 default: 16384 (16K)
+innodb_sort_buffer_size=64K         #MySQL 8 default: 1048576 (1M)
+
+## Settings that relate to the binary log (if enabled)
+binlog_cache_size=4K                #MySQL 8 default: 32768 (32K)
+binlog_stmt_cache_size=4K           #MySQL 8 default: 32768 (32K)
+
+#### Turn off monitoring. Reduces memory usage
 performance_schema = off