Welcome the Technical Support section. Help us in assisting you by providing us with a concise and descriptive elaboration of your issues. Be specific and if possible, provide us with a step-by-step instruction in replicating your problem.
Hello, I'm running the cron job on linux, on my own dedicated server, at 5 minute intervals. I'd like users to get their emails fast and outside of server load is there any issue w/ sub 1 minute intervals. What do you recommend? I'm almost thinking of moving it down to every 10 seconds. Would conflicts occur at that interval? Conflicts calling that PHP script to be run every 10 seconds.
I suggest you to put cron job interval every 5 minute, because some process can take more then 1 minute.
If you want user get they email fast, you set it at jomsocial backend > configuration > site, and set Send Email on Page Load to Yes.