在centos上自己安装的mysql为何如此占内存

我遇到了一模一样的问题，然后按照你的方法改了，并没有效果，反而感觉占用内存上升的更快了。请问题主目前的解决方案是什么。

个人稍微解决了一下，上面忘了说，我的mysql版本是：64位的5.7.9，应该是当前最新版本。从网上找了一下资料，反正就是从配置文件上下手，我本机上安装的是windows版的64位5.6.25，占用内存就非常小，我对照着他的配置文件修改了一下5.7.9的配置文件。
[mysqld]
lower_case_table_names=1
character-set-server=utf8
max_connections = 300
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
key_buffer_size = 16k
max_allowed_packet = 1M
thread_stack = 64k
sort_buffer_size = 64k
net_buffer_length = 2k
performance_schema_max_table_instances = 12500
table_open_cache_instances = 1
eq_range_index_dive_limit = 10
innodb_buffer_pool_dump_at_shutdown = OFF
innodb_buffer_pool_load_at_startup = OFF
innodb_checksum_algorithm = innodb
innodb_file_format = Antelope
innodb_file_format_max = Antelope
innodb_large_prefix = OFF
innodb_purge_threads = 1
innodb_strict_mode = OFF
max_seeks_for_key = 4294967295
max_write_lock_count = 4294967295
myisam_max_sort_file_size = 2146435072
performance_schema_accounts_size = 100
performance_schema_hosts_size = 100
performance_schema_max_cond_instances = 6900
performance_schema_max_file_classes = 50
performance_schema_max_mutex_instances = 21000
performance_schema_max_rwlock_instances = 10800
performance_schema_max_table_handles = 4000
performance_schema_max_thread_instances = 2100
performance_schema_setup_actors_size = 100
performance_schema_setup_objects_size = 100
performance_schema_users_size = 100
sync_binlog = 0
目前的话，情况好了一些。现在mysql占用内存26.4%，剩余内存能稳定在300兆左右了。