Performance

The default settings of Wazo are sufficient for low-traffic environments. However, higher traffic may require some modifications to improve the performance or quality of calls.

Increase the number of concurrent requests

Wazo services can handle multiple requests concurrently. Two settings control the pool of worker threads processing requests: min_threads defines the number of threads and database connections that Wazo daemons keep ready at all times, and max_threads defines the ceiling the pool can grow to when the demand increases. Extra threads and database connections are released automatically when the demand decreases.

Database connections scale with the thread pool: a service holds min_threads connections permanently and may open up to max_threads connections during peaks. The sum of max_threads over all services should stay below the maximum number of database connections. Wazo configures PostgreSQL with max_connections = 2048 by default, which leaves ample headroom.

For example, to modify the number of concurrent requests:

1. Increase the number of concurrent requests for wazo-chatd (for example) by creating a new file /etc/wazo-chatd/conf.d/50-threads.yml:

rest_api:
  min_threads: 10
  max_threads: 200

2. Then restart the service to apply the change:

systemctl restart wazo-chatd