监控关键进程:LMHB进程负责监控LMON(Global Enqueue Service Monitor)、LMD(Global Enqueue Service Daemon)、LCK0(Instance Enqueue Process)、RMS0(Oracle RAC Management Process)以及LMSn(Global Cache Service Process)等关键后台进程的运行状态。 检测性能问题:通过定期检查这些进程的状态和等待事件,LMHB进程能够识别出...
Database and ASM instances, Oracle RAC 该进程负责监控LMON、LMD、LMSn等RAC关键的后台进程,保证这些background process不被阻塞或spin。 LMHB可能是Lock Manager Heartbeat的缩写。 我们来看一下该进程的trace跟踪文件以便了解其功能: 按照 100s -> 80s -> 100s -> 80s的间隔监控并输出一次LMSn、LCKn、LMON...
Errors in file /u01/app/oracle/diag/rdbms/ORCL/ORCL1/trace/ORCL1_lmhb_4038.trc (incident=5794665): ORA-29770: global enqueue process LMON (OSID 3997) is hung for more than 70 seconds Incident details in: /u01/app/oracle/diag/rdbms/ORCL/ORCL1/incident/incdir_5794665/ORCL1_lmhb_4038_i5...
Oracle Database - Enterprise Edition - Version 11.2.0.0 to 12.1.0.2 [Release 11.2 to 12.1]Information in this document applies to any platform.SymptomsRAC database instance crashed due to ORA-29770 while LMS was blocked due to redo allocation.Database instance alertlog file,Sat...
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Starting ORACLE instance (normal) LICENSE_MAX_SESSION = 0 LICENSE_SESSIONS_WARNING = 0 Initial number of CPU is 24 Number of processor cores in the system is 6 我们可以看到,在14:06:28时,LMS1 进程被发现已经hung了超过70秒。 根据之前的时间点14:06:13 所报的信息来看,在14:06:13 时刻,已经...