From /var/log/messages 
Apr 10 05:51:04 <insert_machine_name> abrt[15241]: Saved core dump of pid 14607 (/u01/app/oracle/agent/agent_13.2.0.0.0/oracle_common/jdk/bin/java) to /var/spool/abrt/ccpp-2017-04-10-05:50:31-14607 (33535582208 bytes) 

In $AGENT_INST/sysman/emd directory 
-rw-------. 1 oracle oinstall 33535582208 Apr 10 05:51 core.14607 
-rw-r-----. 1 oracle oinstall 2016 Apr 10 05:50 hs_err_pid14607.log 

Contents of the hs_err_pid*.log
	
Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00007faee7191000, 12288, 0) failed; error='Cannot allocate memory' (errno=12) 
# 
# There is insufficient memory for the Java Runtime Environment to continue. 
# Native memory allocation (malloc) failed to allocate 12288 bytes for committing reserved memory. 
# An error report file with more information is saved as: 
# /u01/app/oracle/agent/agent_inst/sysman/emd/hs_err_pid14607.log 
Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00007faee7393000, 12288, 0) failed; error='Cannot allocate memory' (errno=12)