Data needed for Performance related Support
If you have a performance related issue with a GLU.Engine and are using either the GLU advised JVM settings or your own adjusted JVM settings, please provide the garbage collection log, Thread Dump file, and Heapdump in the support ticket. The relevant Unix stack and jmap commands for capturing these files are provided below. The full developer JDK will need to be installed t0 used these commands.
For centos this is the command to install the developer JDK:
sudo yum install java-1.8.0-openjdk-devel
You will need the PID of the JVM running the GE. use this command to get that:
ps -afe | grep java
This will return a result similar to the following:
[ec2-user@ip-172-31-4-29 ~]$ ps -afe | grep java root 2725 1 3 06:21 ? 00:05:38 java -XX:+PrintGCDetails -Xloggc:gc.log -Xms1g -Xmx3g -XX:+UseG1GC -XX:MaxGCPauseMillis=250 -XX:+UseStringDeduplication -XX:G1HeapRegionSize=32 -XX:ConcGCThreads=4 -XX:G1ReservePercent=15 -XX:InitiatingHeapOccupancyPercent=30 -XX:MetaspaceSize=100M -jar ./engine/ims-1.1-SNAPSHOT.jar –spring.config.additional-location=./engine/config/appSetting.yml ec2-user 4715 3867 0 08:47 pts/0 00:00:00 grep –color=auto java
From this you can see that 2725 is the PID.
gc – garbage collection
If you are running the performance settings, you will find the gc.log file in the GLU working directory.
-rwx------ 1 ec2-user ec2-user 149 Sep 9 09:57 undeploy.sh -rwx------ 1 ec2-user ec2-user 144 Sep 9 09:57 stopengine.sh -rwx------ 1 ec2-user ec2-user 177 Sep 9 09:57 status.sh -rwx------ 1 ec2-user ec2-user 256 Sep 9 09:57 docker-compose.yml -rwx------ 1 ec2-user ec2-user 304 Sep 9 09:57 deploy.sh -rwx------ 1 ec2-user ec2-user 283 Sep 9 09:57 changelogginglevel.sh drwxrwxr-x 3 ec2-user ec2-user 48 Sep 9 11:39 engine -rwx------ 1 ec2-user ec2-user 278 Sep 9 13:36 startengineO.sh -rwx------ 1 ec2-user ec2-user 456 Sep 9 13:47 startengine.sh -rw-r--r-- 1 root root 5 Sep 10 06:21 pid.file drwxrwxr-x 2 ec2-user ec2-user 25 Sep 10 06:21 log -rw-r--r-- 1 root root 293710 Sep 10 07:51 gc.log
gc.log is the file to attach to the Support ticket.
Thread Dump
Use the following command to capture a Thread Dump for the PID of your GLU.Engine:
jstack -l 2725 > /home/ec2-user/imsussdthreadDump.txt
… where 2725 is the PID for the GLU.Engine and /home/ec2-user/imsussdthreadDump.txt is the path and the filename of the file to attach to the Support ticket.
Heapdump
Use the following command to capture a heapdump:
sudo jmap -dump:live,format=b,file=/home/ec2-user/imsUSSDdump.hprof 2725
… where 2725 is the PID for the GE and /home/ec2-user/imsUSSDdump.hprof is the path and the filename of the file to attach to the Support ticket.