Jira Data Center performance problems during deployment
Symptoms:
Some users have experienced performance degradation during deployments on JIRA Data Center.
Cause:
This is usually caused by sub-optimal settings configuration which leads to unnecessary resets of the cluster in-memory cache.
Resolution:
In CMJ's Settings page make sure the Send ClearCacheEvent to clear Jira's internal caches after deployment is not selected.
More details can be found in this article.