Mark
Thanks for the inputs.
We use compression level 2 on both primary and replicate.
This was tried out before upgrade to 15.5 and seems good enough.
BTW on a different server I also tried new compression levels 100 and 101.
for database of same size and did not get substantial reduction in run times.
Stripe sizes increased from 23 GB to 30-33 GB.
As far as I have noted Replicate side is not starved for CPU.
sp_sysmon outputs during the backup period do not show high CPU usage.
Wll it be accurate to to say that like a huge report query, backup activity also churns the caches ?
(i.e. each allocated/used page if not found in the cache is brought in cache by a physical read )
Avinash
