# Tune Batch Indexing Kafka Partitions

The first batch indexing variable that should be determined is the minimum number of Kafka partitions required.

Use the following formula to determine the minimum number of Kafka partitions for
the enrichment toplogy

`Num Partitions=Max( t/p,t/c)`

where

`t`

is the desired throughput`p`

is the maximum throughout using a single producer`c`

is the maximum throughput using a single consumer

Note | |
---|---|

You can estimate the minimum number of partitions requres based on the original
calculations performed for enrichment topologies. However, this may or may not be
suitable as the message size increases as it progresses through Metron topologies.
This increased message size can affect throughput. For this reason, we recommend
that you perform the same steps to calculate the value for the batch indexing
topic. |