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http://www.tuicool.com/articles/NzAFZn
show engine innodb status
pt-deadlock-logger
innodb_print_all_deadlocks={on|off}
mysql> show variables like "%purge%"; +-----------------------------------------+-------+ | Variable_name | Value | +-----------------------------------------+-------+ | gtid_purged | | | innodb_max_purge_lag | 0 | | innodb_max_purge_lag_delay | 0 | | innodb_purge_batch_size | 300 | | innodb_purge_run_now | OFF | | innodb_purge_stop_now | OFF | | innodb_purge_threads | 1 | | innodb_trx_purge_view_update_only_debug | OFF | | relay_log_purge | ON | +-----------------------------------------+-------+ 9 rows in set (0.02 sec)
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原文地址：http://www.cnblogs.com/zengkefu/p/5694826.html
