Bulk write optimization question via points in java

Hello.

I have a question about writing to influxdb using java.
I am using InfluxDB installed on Linux and the specifications are 2 Core and 8G.
During bulk writing, we confirmed that the CPU and memory are more stable when delivering 3,000 points than when transferring 300 points at once.
Can we know why delivering a larger number of cases is more stable?