Lower pps to 25k

[lijunwangs]

Problem

It has been found with 250K PPS, the streamer is sending down excessive amount of packets down stream to cause issues with skip rate increasing.

Summary of Changes

Lower the max streams per second to 25K.

Fixes #

[aeyakovenko]

@lijunwangs isn't this inconclusive? I am not sure if the issue is max pps or lack of client side backoff. Once client side back off is fixed, it makes sense to figure out the max capacity of the pipeline

[lijunwangs]

@lijunwangs isn't this inconclusive? I am not sure if the issue is max pps or lack of client side backoff. Once client side back off is fixed, it makes sense to figure out the max capacity of the pipeline

I thought it was clear the lower level cannot handle that much of packets? And you mentioned the system is going through 1K txn /s only. Even 25K is much larger than that... I will defer this PR to another day after the backoff implementation has more data.