diff --git a/data/conf/mysql/my.cnf b/data/conf/mysql/my.cnf
index 9a2459d5..911dd1c8 100644
--- a/data/conf/mysql/my.cnf
+++ b/data/conf/mysql/my.cnf
@@ -8,13 +8,16 @@ collation-server               = utf8mb4_unicode_ci
 #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
-performance_schema      = 0
 innodb-strict-mode      = 0
 innodb_buffer_pool_size = 96M
 key_buffer              = 16M
 thread_cache_size       = 8
 query_cache_type        = 0
 query_cache_size        = 0
+sort_buffer_size        = 12M
+read_rnd_buffer_size    = 2M
+tmp_table_size          = 48M
+max_heap_table_size     = 48M
 thread_stack            = 128K
 skip-host-cache
 skip-name-resolve