你们的mysql怎么优化的新手不懂啊系统默认的合理吗

skip-external-locking
#skip-innodb
key_buffer_size = 256M
max_allowed_packet = 1M
table_open_cache = 256
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size= 16M
thread_concurrency = 8
tmp_table_size = 16M
max_connections = 300
wait_timeout = 30
interactive_timeout = 30
max_connect_errors = 9
long_query_time = 1


最大连接数 max_connections = 300  是不是就支持300个人同时访问  设置多少合适