Openfire cache maxtime impact

I need help & advice regarding the openfire cache maxtime. Currenlty whenever a new user visit my website,
I add them in Openfire DB via direct DB access instead of user service plugin. This new users is not getting
reflected immediately in webclient. Unless I do not restart the Openfire, this new users are not reflecting in webclient.
I am not in position to use user service plugin, because I have added one extra column in ofUser.
I am not sure how to handle this situation without restarting the openfire server.

I am not sure the impact & performance I will face but I have done below changes…

Openfire Cache I have set to 60000 ( 1 minute ) for all.




This has helped me to get the newuser reflect within span of one minite.

Please advice any adverse impact or Memory or concurrent users capacity