In #86147 we enabled a mechanism that alleviates raft append traffic's impact on I/O overload by letting raft leaders selectively pause replication streams to followers. Since we are unable to perform as much production-grade testing of this feature during the stability period as planned, we now prefer an incremental roll-out:

• default the cluster setting to disable pausing for 22.2: kvserver: disable replica pausing by default #86776
• incrementally roll out a value of 0.8 on CockroachCloud
• brief Customer Support and SRE on the existence of the setting and its potential utility in overload situations (i.e. write KB entry).
• default the setting to true for the 23.1 release.
• resurrect the roachtest in roachtest: exercise follower replica IO overload #81834.

Jira issue: CRDB-18925