PHP MySQL - Stilson.net

CHAPTER 26 • INSTALLING AND CONFIGURING MYSQLwww.it-ebooks.infoExecuting this command produces output similar to the following:+---------------+--------+| Variable_name | Value |+---------------+--------+| table_type | InnoDB |+---------------+--------+1 row in set (0.00 sec)Finally, you can review some rather interesting statistical information such as uptime, queriesprocessed, and total bytes received and sent by using the following command:mysql>SHOW STATUS;Executing this command produces output similar to this:+-----------------------------------+-----------+| Variable_name | Value |+-----------------------------------+-----------+| Aborted_clients | 0 || Aborted_connects | 1 || Binlog_cache_disk_use | 0 || Binlog_cache_use | 0 || Bytes_received | 134 || Bytes_sent | 6149 || Com_admin_commands | 0 || . . . | || Threads_cached | 0 || Threads_connected | 1 || Threads_created | 1 || Threads_running | 1 || Uptime | 848 |+-----------------------------------+-----------+Managing Connection LoadsA well-tuned MySQL server is capable of working with many connections simultaneously. Eachconnection must be received and delegated to a new thread by the main MySQL thread, a task that,although trivial, isn’t instantaneous. The back_log parameter determines the number of connectionsthat are allowed to queue up while this main thread deals with a particularly heavy new connection load.By default this is set to 50.Keep in mind that you can’t just set this to a very high value and assume it will make MySQL runmore efficiently. Both your operating system and web server may have other maximum settings in placethat could render a particularly high value irrelevant.498