Description:
Added below metrics to server status.
(https://docs.mongodb.com/manual/reference/command/serverStatus/#serverstatus.metrics.repl)
1) metrics.repl.stepDown - A document that reports on metrics collected
while performing step down.
2) metrics.repl.stepDown.userOperationsKilled - Tracks the number of user operations killed on step down.
3) metrics.repl.stepDown.userOperationsRunning - Tracks the number of user operations left running on step down.
4) metrics.repl.network.notMasterLegacyUnacknowledgedWrites - Tracks the number of times a legacy unacknowledged write failed due to not master error resulted in network disconnection.
5) metrics.repl.network.notMasterUnacknowledgedWrites - Tracks the number of times an unacknowledged write failed due to not master error resulted in network disconnection.
Engineering Ticket Description:
Add the following metrics to server status:
- repl.stepDown.userWriteOperationsKilled: Write operations killed by stepdown.
- repl.stepDown.userReadOperationsRunning: Read operations left running at stepdown
- repl.network.secondaryLegacyUnacknowledgedWrites: Write operations to a secondary which resulted in a disconnection due to being an unacknowledged write (legacy ops)
- repl.network.secondaryUnacknowledgedWrites: Write operations to a secondary which resulted in a disconnection due to being an unacknowledged write
Add the following logging:
- At stepdown log the number of operations killed and preserved.
- Log when an unacknowledged write results in a disconnection.