We have upgraded our replica set from 3.0 to 3.2.9 and then to 3.2.10 six month ago (see ticket #SERVER-26386 with you),
And we notice that ever since that upgrade the response time from the replica set has increased significantly.
Plus we are experiencing spikes in the response time which weren't present prior to the upgrade.

Enclosed please find are logs files for the last week, where this symptom continued
Plus the diagnostic files from our primary replica.

We wish to try and understand with you,
Could it a buggy behaviour, same as the one that made us upgrade from 3.2.9 or simply a configuration issue that requires us to do some adjustments?

We were expecting to upgrade to improve performance measured by response time, rather that decrease it, as you can understand.

Thanks,
Avraham Kalvo
WiX DBA