Configure Ops Manager to Monitor Large Deployments

Allocate more RAM to Ops Manager Hosts

1. Open /opt/mongodb/mms/conf/mms.conf in your preferred text editor.

2. Find a line where the JAVA_MMS_UI_OPTS variable defines the -Xms, -Xmx, and -Xmn parameters.

3. Update the -Xms and -Xmx values from the default of 4352 MB to 8192 MB or more if the hosts have extra free memory.

4. Update the -Xmn value from the default of 1500 MB to a quarter of the value that you specified for -Xms and -Xmx.

To learn about how to resolve this error in greater detail, see our troubleshooting entry on the OutOfMemoryError

Improve Monitoring Ingestion

Update app settings on all Ops Manager hosts to improve monitoring ingestion:

1. Open /opt/mongodb/mms/conf/conf-mms.properties in your preferred text editor.

2. Add the following properties:

   # Improved monitoring ingestion
   ingestion.thread.count=64
   ping.thread.count=32
   mms.monitoring.agentlog.writers=16
   mms.monitoring.ingestion.databasenames.poolsize=16
   mms.monitoring.ingestion.diskpartition.poolsize=16
   mms.monitoring.ingestion.groupupdate.poolsize=8
   mms.monitoring.ingestion.hostping.poolsize=32
   mms.monitoring.ingestion.hostversionchange.poolsize=8
   mms.monitoring.ingestion.ipaddresschange.poolsize=8
   mms.monitoring.ingestion.hostlogs.poolsize=16
   mms.monitoring.ingestion.newrelic.poolsize=16
   mms.monitoring.ingestion.profiler.poolsize=16
   mms.monitoring.ingestion.shardchunkcount.poolsize=16
   mms.monitoring.ingestion.totalstoragecache.poolsize=16
   mms.monitoring.rrd.rawdbperf.thread.count=16
   mms.monitoring.rrd.rawdbperf.batch.size=1000
   mms.monitoring.rrd.rawdbstorage.thread.count=16
   mms.monitoring.rrd.rawdbstorage.batch.size=1000
   mms.monitoring.rrd.rawdisk.thread.count=32
   mms.monitoring.rrd.rawdisk.batch.size=1000
   mms.monitoring.rrd.rawhost.thread.count=32
   mms.monitoring.rrd.rawhost.batch.size=1000
   mms.monitoring.rrd.rawnamespace.thread.count=16
   mms.monitoring.rrd.rawnamespace.batch.size=1000
   mms.monitoring.rrd.rawprocess.thread.count=32
   mms.monitoring.rrd.rawprocess.batch.size=1000
   mms.monitoring.rrd.rawsystem.thread.count=32
   mms.monitoring.rrd.rawsystem.batch.size=1000

3. Save the properties file.

4. Restart Ops Manager.