Do not emit metrics when acquire shard r/w lock

[wxing1292]

Is your feature request related to a problem? Please describe. CPU profiling shows that logic probably should not emitting metrics during / before acquisition of shard r/w lock.

Describe the solution you'd like Either do not emit metrics when acquiring shard r/w lock or at least do sampling

Describe alternatives you've considered N/A

Additional context N/A

[wxing1292]

cc @tusharroy25 @paulnpdev

[paulnpdev]

cc @yiminc