Oracle Enterprise Manager 11g - OEM 11g Log file location

 

$ORACLE_HOME/sysman/config/emInstanceMapping.properties

This file will tell you the internal ID (OMS name) of the OMS, and a pointer to the file with all the port and directory details used for this OMS.

EMGC_OMS1=/app/oracle/gc_inst/em/EMGC_OMS1/emgc.properties

Once you know the location of the instance specific files of the OMS, everything else will fall into place. Take note of three key properties in the file, which will help you find the log files

EM_INSTANCE_HOME	EM_INSTANCE_HOME=/app/oracle/gc_inst/em/EMGC_OMS1
EM_DOMAIN_NAME	EM_DOMAIN_NAME=GCDomain
EM_DOMAIN_HOME	EM_DOMAIN_HOME=/app/oracle/gc_inst/user_projects/domains/GCDomain
EM_WEBTIER_INSTHOME	EM_WEBTIER_INSTHOME=/app/oracle/gc_inst/WebTierIH1
The OMS application log files	<EM_INSTANCE_HOME>/sysman/log
	/oracle/gc_inst/em/EMGC_OMS1/sysman/log
OMS Java Application log files	<EM_DOMAIN_HOME>/servers/<OMS ID>/logs
	/oracle/gc_inst/user_projects/domains/GCDomain/servers/EMGC_OMS1/logs
The Application stack log files:	<EM_DOMAIN_HOME>/servers/EMGC_ADMINSERVER/logs
	/oracle/gc_inst/user_projects/domains/GCDomain/servers/EMGC_ADMINSERVER/logs
The Apache (HTTP Server) log files	<EM_WEBTIER_INSTHOME>/diagnostics/logs/OHS/ohs1
	/app/oracle/gc_inst/WebTierIH1/diagnostics/logs/OHS/ohs1

 

Reference: https://blogs.oracle.com/oem/entry/differences_between_em10g_and