Percona-Toolkit系列(5) --- pt-deadlock-logger

pt-deadlock-logger

说明

用途：记录MySQL死锁信息。

语法：

pt-deadlock-logger [OPTIONS] DSN

注：pt-deadlock-logger在给定的DSN上记录关于MySQL死锁的信息。信息被打印到STDOUT，也可以通过指定—dest保存到表中。除非指定了--run-time(时间)或--iterations(次数)，否则该工具将永远运行。

具体例子

将死锁信息打印到屏幕上，并不插入到表中。

[root@BigData ~]# pt-deadlock-logger h=192.168.20.5,u=root,p=Sanshi_408,P=3306
server ts thread txn_id txn_time user hostname ip db tbl idx lock_type lock_mode wait_hold victim query
192.168.20.5 2019-07-26T11:58:01 352114 0 492 root localhost  lei test age RECORD X w 1 delete from test where age=1
192.168.20.5 2019-07-26T11:58:01 358455 0 483 root localhost  lei test age RECORD X w 0 delete from test where age=1

将死锁信息插入到表中deadlocks

[root@BigData ~]# pt-deadlock-logger --ask-pass --create-dest-table D=test,t=deadlocks h=192.168.20.5,u=root,p=Sanshi_408,P=3306
server ts thread txn_id txn_time user hostname ip db tbl idx lock_type lock_mode wait_hold victim query
192.168.20.5 2019-07-26T11:58:01 352114 0 492 root localhost  lei test age RECORD X w 1 delete from test where age=1
192.168.20.5 2019-07-26T11:58:01 358455 0 483 root localhost  lei test age RECORD X w 0 delete from test where age=1

可以通过查看表deadlocks来了解死锁信息。

deadlocks表结构

CREATE TABLE deadlocks (
  server char(20) NOT NULL,
  ts timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  thread int unsigned NOT NULL,
  txn_id bigint unsigned NOT NULL,
  txn_time smallint unsigned NOT NULL,
  user char(16) NOT NULL,
  hostname char(20) NOT NULL,
  ip char(15) NOT NULL, -- alternatively, ip int unsigned NOT NULL
  db char(64) NOT NULL,
  tbl char(64) NOT NULL,
  idx char(64) NOT NULL,
  lock_type char(16) NOT NULL,
  lock_mode char(1) NOT NULL,
  wait_hold char(1) NOT NULL,
  victim tinyint unsigned NOT NULL,
  query text NOT NULL,
  PRIMARY KEY  (server,ts,thread)
) ENGINE=InnoDB