I've configured my i7 64gb ssd server with centos7 with the following my.cnf
[mysqld] key_buffer = 12M max_allowed_packet = 16M table_cache = 4096 table_open_cache = 4096 table_definition_cache = 4096 sort_buffer_size = 48M read_buffer_size = 32M read_rnd_buffer_size = 104M myisam_sort_buffer_size = 100M myisam_max_sort_file_size = 1024m #myisam_max_extra_sort_file_size = 1024m myisam_repair_threads = 1 thread_cache_size = 32 query_cache_type = 1 query_cache_size = 512M query_cache_limit = 8M max_connections=50 wait_timeout=60 tmp_table_size = 256M max_heap_table_size = 64M #innodb_io_capacity = 400 #innodb_read_io_threads = 8 #innodb_write_io_threads = 8 #innodb_buffer_pool_instances = 8 innodb_buffer_pool_size = 3G innodb_additional_mem_pool_size = 24M
But when i run mysql_tuner.pl i still get
TABLE CACHE Current table_open_cache = 482 tables Current table_definition_cache = 4096 tables You have a total of 1027 tables You have 482 open tables. Current table_cache hit rate is 15% , while 100% of your table cache is in use You should probably increase your table_cache
Of course i restarted my mariadb instance. but i have no clue. Search turned up empty as well.
Hope someone could help out Cheers.
Opened_tableincrementing as time passes? You could check withmysqladmin -r -i 5 extended-status | grep Opened. What is max number of file descriptors that mysqld user can opend? You could check withulimit -a | grep files.