[Bug] bookie throughput is larger than broker throughput

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/pulsar/issues) and found nothing similar.

### Version

pulsar 2.10.4

### Minimal reproduce step

bookie throughput is larger than broker throughput in pulsar 2.10.4

### bookie monitor

max bookie throughput is 500MB/S

### broker monitor

max broker throughput is 8MB/S

### pulsar persistence config
```
"bookkeeperEnsemble" : 3,
"bookkeeperWriteQuorum" : 3,
"bookkeeperAckQuorum" : 2,
"managedLedgerMaxMarkDeleteRate" : 0.0
```

### What did you expect to see?

bookie throughput = broker throughput * 3

### What did you see instead?

bookie throughput is larger than broker throughput * 3

### Anything else?

_No response_

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

No source file, test, or entry point is identified. Start by reproducing the throughput discrepancy on Pulsar 2.10.4 using the provided BookKeeper settings, then compare the bookie and broker monitor measurements; done means explaining the difference and correcting the behavior or its reporting.

Written by the indexing model from the issue text.