emqx4.3/examples/force_gc.conf.example

##--------------------------------------------------------------------
## Force garbage collection
##
## Force garbage collection in MQTT connection process after they process certain number of messages or bytes of data
##--------------------------------------------------------------------
## Note: This is an example of how to configure this feature
##       you should copy and paste the below data into the emqx.conf for working

force_gc {
    ## set to false to disable this
    enable = true

    ## GC the process after this many received messages
    count = 16000

    ## GC the process after specified number of bytes have passed through
    bytes = 16MB
}