Random CSV Data Set Config

scenario:- i have an script , which has around 14 transaction, out of which few are repeated transaction, so we have them in fragments. and we are using the random csv data set config for parameterisation

issue: as this random csv config is referred many transactions with in a single iteration and also the number of threads is more than 500, we encounter a memory issue during the run and samples get stalling, this is due to the file opening on for every user, for every iteration to use this random csv data set.

ask:- do we have any other alternative to this random csv data set config element

note:- every script of mine has one or more random csv data set config, and i have around 8+ scripts witth more than 4k users for the entire scenario