Memory problems with config service

Hi all,

I'm having problems with memory in config service. I increased vsz_limit to 10GB but continue with this errors when try to reload or restart dovecot:

config: Panic: data stack: Out of memory when allocating 2147483688 bytes master: Error: service(config): command startup failed, throttling for 2 secs config: Fatal: master: service(config): child 5512 killed with signal 6 (core dumps disabled)

Dovecot has a lot of certificates TLS configured (SNI) (about 3k), but if I check the size of all of them is aprox 170MB on disk.Why does it need so much memory to boot? Is normal?

service config { vsz_limit = {{ vszlimit }} }