Various parameters in Puma, Streaming and Sidekiq can be fine-tuned for concurrency. To change the parameters, edit /app/data/config.sh using the File manager and restart the app. See scaling docs for more information.

Sample configuration for /app/data/config.sh (from here):

# Puma
export WEB_CONCURRENCY=4 # number of worker processes
export MAX_THREADS=5 # the number of threads per process

# Streaming API
export STREAMING_CLUSTER_NUM=2 # number of worker processes

# Sidekiq
export SIDEKIQ_THREADS=4
export DB_POOL=25 # must be at least the same as the number of threads