9aman commented on PR #19161:
URL: https://github.com/apache/pinot/pull/19161#issuecomment-5239337795
```
┌────────────────────────────┬──────────────┬──────────────────┬─────────────────────┐
│ Regime │ Records/poll │ Gap probability │ RPC :
messages │
├────────────────────────────┼──────────────┼──────────────────┼─────────────────────┤
│ Catch-up, full polls │ 500 │ ≈ marker density │ ≪ 1/500
│
├────────────────────────────┼──────────────┼──────────────────┼─────────────────────┤
│ Tail, high throughput │ large │ ≈ 1 │
~1/records-per-poll │
├────────────────────────────┼──────────────┼──────────────────┼─────────────────────┤
│ Tail, low rate, 1-rec txns │ 1 │ ≈ 1 │ 1:1
│
└────────────────────────────┴──────────────┴──────────────────┴─────────────────────┘
```
this is a good estimate of the additional calls that we will end up making.
500 is the default max records per poll. There are restrictions on the bytes
fetched per call as well.
Number of additional calls is inversely proportional to
1. Number of records fetched in one call.
2. Number of messages within a transaction.
cc: @KKcorps @noob-se7en
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