Network Deployment (Distributed operating systems), v8.0 > Set up the application serving environment > Administer nodes and resources > Administer nodes remotely using the job manager
Tune the job polling interval
We can tune the polling interval that each dmgr or admin agent uses to poll the job manager for jobs. The default polling interval is 30 seconds. With a larger polling interval, the rate at which the dmgrs or admin agent contact the job manager decreases, which alleviates high processor usage. With a lower polling interval, jobs start running sooner.
To configure the polling interval of a dmgr, the dmgr must be running.
To configure the polling interval of an admin agent, the admin agent must be running.
The job manager processor usage increases as more nodes or dmgrs are registered with the job manager. This increase occurs even if a job is not submitted to the job manager. The job manager eventually runs at 100 percent processor usage as more targets are registered. The threshold for the number of targets that you can register with the job manager without high processor usage depends on the hardware capability of the machine that runs it.
This topic describes how to change the polling interval for the dmgr or admin agent .
Procedure
- Determine the polling interval to set to lower processor usage or to improve job processing.
The default polling interval is 30 seconds. As the number of nodes or dmgrs that are registered with the job manager increases, the polling interval must increase to avoid high processor usage on the job manager. The actual value depends on the hardware that the job manager is running. However, determine the value on a case-by-case basis. With up to 100 nodes or dmgrs registered with the job manager, you might need a polling interval that is as long as 20 minutes.
- Change the polling interval for the dmgr as needed.
- Click System administration > Deployment manager > Job managers > UUID .
- Change the value for the polling interval setting.
- Save the changes and restart the dmgr.
- Change the polling interval, as needed, for each node that an admin agent manages.
- Click System administration > Administrative agent > Nodes > node_name > Job managers > Job manager UUID .
- Change the value for the polling interval setting.
- After changing the setting for all the nodes that an admin agent manages, save the changes and restart the admin agent.
Results
You configured the polling interval.
What to do next
Monitor the processor usage on the job manager. If the processor usage is still high, increase the polling interval. If jobs take too long to start, lower the polling interval.
Administer nodes remotely using the job manager
Start and stop the dmgr
Start and stop the admin agent
Related
startServer command