[SR-Users] kamailio workers and private memory

Hi, I use "kamctl sercmd pkg.stats" to check the private memory status. I notice that the workers for the proccess "slow timer", "timer", "MI FIFO", use a lot of memory. My system configuration does "mt_reload" for around 5 million lines every hour, it looks like in time, the pkg memory of the workers above is growing...... I set the private memory to 16M instead of 4M. Now the used size (after 3 weeks) is 4M. I will upgrade to 3.3.0 soon and will use mem_join=1, will it help the private memory defrag as well? How can I increase the number of workers for these processes? Will it help increasing it if possible? BR, Uri