openstack-ansible-galera_se.../releasenotes/notes/capping_galera_server_worke...

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---
features:
- Capping the default value for the variable ``galera_wsrep_slave_threads``
to 16 when the user doesn't configure this variable. Default value is
the number of vCPUs available on the machine with a capping value of 16.
- Capping the default value for the variable ``galera_max_connections``
to 1600 when the user doesn't configure this variable. Default
value is 100 times the number of vCPUs available on the machine with a
capping value of 1600.