Hello, A new question has been asked in "MariaDB Community" by artemkuchin. Please answer it at http://mariadb.com/kb/en/maria-10015-high-cpudisk-usage-without-queries/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- I just migrated the server from mysql 5.5 to mariadb 10.0.15 It is a web hosting server with about 100 sites on different platforms. So, there are about 100 databases. Most tables myisam, some innodb (mostly joomla 3) Before with mysql CPU load was less than 10%, disk uses by mysqld was also not very high. No, with top and top -mio i see pretty high numbers. mysqld takes from 20 to 30% cpu and 80-100% disk About configuration. It is xeon 4 cores+HT (8 cores seen by OS) with 32GB ram, 2 3TB SATA disks in software mirror. os is FreeBSD 10.1 stable I tried using thread of pools, one thread per connection - all the same The weird think what i show processlist i ass about 20 haning connection without any question. This is is normal, some sites leave connections for a while (mod_perl, php) the weirdness is that thare no queies while 20-30% load of CPU. What is mariddb doing? my.cnf [mysqld] #thread-handling= one-thread-per-connection thread_handling=pool-of-threads thread_pool_size=4 thread_cache_size = 45 init-connect='SET NAMES cp1251' default-storage-engine = MyISAM port= 3306 socket= /hoster/tmp/mysql.sock skip-external-locking skip-networking slow_query_log=1 slow_query_log_file=/hosts/MYSQLDB/slow.log # GLOBAL max_connections=800 max_allowed_packet = 50M key_buffer_size = 512M table_open_cache = 32768 query_cache_size = 256M query_cache_limit = 32M # PER THREAD read_buffer_size = 2M # PER REQUEST sort_buffer_size = 32M read_rnd_buffer_size = 1M myisam_sort_buffer_size = 128M join_buffer_size=2M server-id = 1 innodb_data_home_dir = /hosts/MYSQLDB innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend innodb_log_group_home_dir = /hosts/MYSQLDB innodb_buffer_pool_size = 384M innodb_log_file_size = 100M innodb_log_buffer_size = 8M innodb_flush_log_at_trx_commit = 3 innodb_lock_wait_timeout = 50 -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/maria-10015-high-cpudisk-usage-without-queries/