Pool-of-threads, or threadpool, is a MariaDB feature that improves performance by pooling active threads together instead of the old one thread per client connection method, which does not scale well for typical web-based workloads with many short-running queries.
my.cnffile (or to an existing
[mysqld]section) and then restart MariaDB:
[mysqld] thread_handling = pool-of-threads
my.inifile and then restart MariaDB:
[mysqld] thread_handling = one-thread-per-connection ...