How to increase Agent Heap Memory using Memory Calculator

To achieve that, you should:

• create a folder: /etc/systemd/system/instana-agent.service.d
• inside instana-agent.service.d directory  create a file memory.conf
• add this:

[Service]
Environment=AGENT_MAX_MEM=1024m
Environment=INSTANA_USE_MEMORY_CALCULATOR=true

Note: This way, INSTANA_USE_MEMORY_CALCULATOR will calculate automatically how much heap memory to set. Set AGENT_MAX_MEM value depending on your host memory.

• reload the daemon:
  systemctl daemon-reload 
• then restart the agent:
  systemctl restart instana-agent.service​

• check if AGENT_MAX_MEM is recognized:

If this is installation without systemd, it means that the memory calculator is not enabled, so adjusting the JAVA_OPTS=-xmx parameter approach should be used. It can be achieved by editing the /opt/instana/agent/bin/setenv file.

Environment variable: JAVA_OPTS
Value: String, space-separated JVM arguments
Description: Additional Java Virtual Machine configurations you may want to pass to the startup of the host agent. For example, you may use -Xms<value> and -Xmx<value> to set the minimum and maximum amount of heap available to the agent, respectively.