Check memory utilization

To check the memory being utilized by one of the java services (OpenIAM services, Elasticsearch, and Cassandra), we need to use the steps described below.

 ps -ef | grep java

The above command will provide a list of the java processes which are running and the arguments by each process during startup.

openiam    16649   16646  2 16:39 ?        00:05:44 /usr/local/openiam/jdk/bin/java -Dlogging.level.org.elasticsearch.client=ERROR -Dlogging.level.root=WARN -Dlogging.level.org.openiam=WARN -Dconfpath=/usr/local/openiam -jar -Xmx1024m -Djdk.tls.client.protocols=TLSv1.2 /usr/local/openiam/services/bin/auth-manager.jar
openiam    16690   16687  1 16:39 ?        00:02:27 /usr/local/openiam/jdk/bin/java -Dlogging.level.org.elasticsearch.client=ERROR -Dlogging.level.root=WARN -Dlogging.level.org.openiam=WARN -Dconfpath=/usr/local/openiam -jar -Xmx256m -Djdk.tls.client.protocols=TLSv1.2 /usr/local/openiam/services/bin/device-manager.jar
openiam    16733   16728  1 16:39 ?        00:03:07 /usr/local/openiam/jdk/bin/java -Dlogging.level.org.elasticsearch.client=ERROR -Dlogging.level.root=WARN -Dlogging.level.org.openiam=WARN -Dconfpath=/usr/local/openiam -jar -Xmx512m -Djdk.tls.client.protocols=TLSv1.2 /usr/local/openiam/services/bin/email-manager.jar
openiam    16813   16774  1 16:39 ?        00:04:17 /usr/local/openiam/jdk/bin/java -Dlogging.level.org.elasticsearch.client=ERROR -Dlogging.level.root=WARN -Dlogging.level.org.openiam=WARN -Dconfpath=/usr/local/openiam -jar -Xmx2048m -Djdk.tls.client.protocols=TLSv1.2 /usr/local/openiam/services/bin/openiam-esb.jar
openiam    16820   16811  1 16:39 ?        00:02:44 /usr/local/openiam/jdk/bin/java -Dlogging.level.org.elasticsearch.client=ERROR -Dlogging.level.root=WARN -Dlogging.level.org.openiam=WARN -Dconfpath=/usr/local/openiam -jar -Xmx512m -Djdk.tls.client.protocols=TLSv1.2 /usr/local/openiam/services/bin/groovy-manager.jar
openiam    16879   16877  2 16:39 ?        00:04:59 /usr/local/openiam/jdk/bin/java -Dlogging.level.org.elasticsearch.client=ERROR -Dlogging.level.root=WARN -Dlogging.level.org.openiam=WARN -Dconfpath=/usr/local/openiam -jar -Xmx512m -Djdk.tls.client.protocols=TLSv1.2 /usr/local/openiam/services/bin/idm.jar

The above command is helpful in determining which processes are running, their process id (PID), and the memory that this component is allowed to use; determined by the -Xmx argument shown above.

To determine the additional details, use the command below. PID is the process id taken from the above.

kill -3 [PID]

The output of this command will be sent to the log related to the service you are checking. These logs can be found in /usr/local/openiam/logs. To view the logs you can use the following: tail [log file name]

Example, for the auth-manager:

tail auth-manager.log 

Output:
JNI global refs: 31, weak refs: 0

Heap
 garbage-first heap   total 512000K, used 215965K [0x00000000c0000000, 0x0000000100000000)
  region size 1024K, 138 young (141312K), 10 survivors (10240K)
 Metaspace       used 129663K, capacity 132186K, committed 133768K, reserved 1167360K
  class space    used 15396K, capacity 16406K, committed 16972K, reserved 1048576K

Disable swap

Redis memory utilization