12c DG broker DMON自动重启过程分析

一、知识点
1.强烈建议大家管理dataguard使用broker。
2.broker的日志要知道在哪里，会看日志是学习的第一步。
3.体系结构需要看官方文档。

二、测试过程

1.查看DMON进程$ps -ef|grep dmonoracle   16045     1  0 15:49 ?        00:00:00 ora_dmon_orcldgoracle   16873 15880  0 15:52 pts/0    00:00:00 grep --color=auto dmon2.kill DMON进程$kill 16045$3.查看broker日志$tail -f drc*.log2017-12-18 15:49:36.224                      SQL [ALTER SYSTEM REGISTER] Executed successfully12/18/2017 15:49:36Broker Configuration:       "dg_config"      Protection Mode:            Maximum Performance      Fast-Start Failover (FSFO): Disabled, flags=0x0, version=0      Primary Database:           orcl (0x01010000)12/18/2017 15:49:40orcldg version check successfully completedBroker configuration file is current on orcldg, completing initializationCreating process RSM0  --正常状态12/18/2017 15:53:13RSM0 terminating since Data Guard Broker Monitor Process (DMON) is not running12/18/2017 15:53:39No DMON process running, NetSlave exiting... --进程被KILL的日志12/18/2017 15:53:53PMON Deregistering service orcldg_DGB with listener(s)2017-12-18 15:53:54.951                      PMON: >> Broker cleanup complete <<2017-12-18 15:53:54.951                      Restart Data Guard Broker Process, DMON2017-12-18 15:53:54.951                      PMON: Creating Data Guard Broker Monitor Process (DMON)2017-12-18 15:53:57.147                      drcx: DMON is not yet available for PROBE.2017-12-18 15:53:57.964                      >> Starting Data Guard Broker bootstrap <<  --自动重启dmon2017-12-18 15:53:57.964                      Broker Configuration File Locations:2017-12-18 15:53:57.964                            dg_broker_config_file1 = "+DATADG/orcldg/dr1.dat"   --配置文件路径2017-12-18 15:53:57.964                            dg_broker_config_file2 = "+DATADG/orcldg/dr2.dat"   --配置文件路径2017-12-18 15:53:57.964                      DMON: Attach state object2017-12-18 15:53:57.964                      DMON: rfafoGetLocks reinitializing dubious PMYSHUT lock value block contents: sts=0, flags=0x0, spare1=0x0, spare2=0x0, cksm=0x0, rndm=0x02017-12-18 15:53:57.965                      DMON: Broker state reconciled, version = 0, state = 000000002017-12-18 15:53:57.965                      DMON: Broker State Initialized  --初始化2017-12-18 15:53:57.965                            Version = 12017-12-18 15:53:57.965                            State = 000000002017-12-18 15:53:57.965                      DMON: Entered rfm_get_chief_lock() for CTL_BOOTSTRAP, reason 22017-12-18 15:53:57.965 7fffffff           0 DMON: Entered rfm_get_chief_lock() for CTL_BOOTSTRAP, reason 02017-12-18 15:53:58.980 7fffffff           0 DMON: start task execution: broker initialization2017-12-18 15:53:58.980                      DMON: Boot configuration (0.0.0), loading from "+DATADG/orcldg/dr2.dat"2017-12-18 15:53:58.996                      DMON Registering service orcldg_DGB with listener(s)2017-12-18 15:53:58.996                      DMON: Executing SQL [ALTER SYSTEM REGISTER]2017-12-18 15:53:58.996                      SQL [ALTER SYSTEM REGISTER] Executed successfully12/18/2017 15:53:59Broker Configuration:       "dg_config"      Protection Mode:            Maximum Performance      Fast-Start Failover (FSFO): Disabled, flags=0x0, version=0      Primary Database:           orcl (0x01010000)12/18/2017 15:54:02orcldg version check successfully completedBroker configuration file is current on orcldg, completing initializationCreating process RSM0

整个进程自动重启的时间不超过1分钟，自动完成。