Reuse etcd cluster, kvctl-server memory usage will be very large

kvrocks controller version 0.2.0
go version 1.20

each etcd node has 1.5G data

when kvctl-client connect to kvctl-server， the memory will increase by about 2

I want to know if this is normal?

Start by reproducing the kvctl-client connection against a reused etcd cluster with about 1.5G of data on each node, while measuring kvctl-server memory before and after the connection. Determine whether the roughly twofold increase is expected, then document the cause or define the necessary fix and its verification.

Written by the indexing model from the issue text.