Investigate increased connection count in redis v5 gem
Around the time we deployed gitlab-org/gitlab!144300 (merged), we started seeing an increased number of ERR max number of clients reached
messages (https://log.gprd.gitlab.net/app/r/s/EOCAo):
We created an incident here: production#17592 (closed)
UPDATE: It appears the root cause is due to a change in behavior that causes connections to be leaked when using Redis Sentinels: #2867 (comment 1774963444)
Edited by Stan Hu