Cron Job help - what exactly does it do?

Hi, I enabled the cron job on my live site and first thing it did was send thousands of emails to my registered users for cupid match... ouch! luckly I managed to stop it half way through by clearing the queue.

So then I enabled it on my test system and some questions:

1. Still got the cupid mails (I don't want cupid mail going out, I only want people to view matches online), how do I stop cupid mail, I've tried setting the 'Send a cupid mail if the recently joined profile matches more than this percentage:' to 1000, my match only add's up to 100%, they still go out? can I comment this out in the cron?

2. What else does the cron do? why exactly do I need it turned on?

I get the following email:

- Membership expiration letters -
Send membership expire letters: 0 letters - I don't have membership or expire accounts, I assume this will always be 0?

- Temporary files check - - I assume this is for performance reasons?, clean up the site?
Total temp files: 19
Deleted temp files: 9

- Database cleaning - - Does any of the below delete live data? says deleted views, is this deleting the view counts, as I want to keep those, it's all very misleading?? I don't want to delete things, I do want good performance?
Deleted profiles:
Deleted virtual kisses: 0
Deleted messages: 0
Deleted sessions: 0
Deleted records from ip block list: 0
Deleted views: 42
Deleted votes: 0
Deleted comment votes: 0

Thanks in advance for any help :)

Yes, Yes and No.

It's all good.

Here's are the main things the cron does:

1. Sends out those annoying match emails you're talking about. Hopefully they will remove this feature at some point, or at least fix it.

2. Sends out the mass emails to your members if you use the "mass mailer" function in admin.

3. Processes videos that are uploaded.

4. Cleans everything up in the db once a day (that's where that email you posted comes from).

These are the main things it does, I know some of the other modules use it too but I can't think of them off the top of my head. If you want to see exactly what it's running look in your database at the sys_cron_jobs table.

Great, thanks for clarifying.. so, i want everything except the match emails to work, what do I comment out to achieve this? 

Thanks in advance

administration/advanced_settings.php

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