Deployment Config changes for performance

Owned by Andrew Watkins
18-03-2020
1 min read

The following changes to an installation may increase performance

Note that these changes will increase the number of AWS units consumed.

Configure autoscaling

The default cloudformation script run a fixed 3 server system. This is enough to support continuous rolling deployment.

For Autoscaling - update the ‘Service’ Definition
Set min tasks to 2, desired to 3 max to 10.
Define a scaling policy - GrowWhenBusy - above 80%cpu after 300 secs.

Increase Container Capacity

Modify the task definition.

Increase Fargate Container to 4GB and 1 vCPU ( default is 0.25)
Update load balancer health check
increase timeout from 10 secs to 60. require 5 unhealthy before restarting server

Update Load Balancer Health Check

In the loadbalance change the health check to not use / which loads the landing page and is expensive but to use /api/health which is designed for rapid polling.

Protocol HTTP Path /api/health Port traffic port Healthy threshold 2 Unhealthy threshold 5 Timeout 60 Interval 200 Success codes 200