Hi Experts,
I tried to add 7 columns which all allowed NULL with no constraint. The change on the source got deployed successfully but when it was replicated to target replicated 45 DB's. The production DBA's reported a lot of performance issue related to locking of table.
Am still not sure how adding empty Null tables can cause performance degradation when it just a meta data change I guess.
Records around 15 million.
Could you please suggest the possibilities due to which the degradation was caused. Ways to identify the root cause like wait statistics should be good enough to know the root cause or some other approach can be opted.
Thanks & regards
Priya