[MySQL] Some tweaks to lower RAM consumption, thanks to @Thomas2500

data/conf/mysql/my.cnf

@@ -7,16 +7,18 @@ collation-server               = utf8mb4_unicode_ci
 #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         = 500
+max-connections         = 350
+key_buffer_size         = 0
+read_buffer_size        = 128K
+sort_buffer_size        = 1M
+innodb_buffer_pool_size = 8M
+read_rnd_buffer_size    = 256K
+tmp_table_size          = 16M
+performance_schema      = 0
 innodb-strict-mode      = 0
-innodb_buffer_pool_size = 128M
-key_buffer_size         = 24M
 thread_cache_size       = 8
 query_cache_type        = 0
 query_cache_size        = 0
-sort_buffer_size        = 16M
-read_rnd_buffer_size    = 2M
-tmp_table_size          = 48M
 max_heap_table_size     = 48M
 thread_stack            = 128K
 skip-host-cache