Cron Job Management

AS I looked at the sys_cron_Jobs table I noticed a great number of cron job setup to run at the exact same time.  I did a little research about the time structure for cron jobs and what they mean.  I have attached a copy of what I changed mine to and I tried to stagger them.............can someone who really understands these the importance of the correct timing and see if there are any issues with the way I set these up.............See Attached I tried to stagger them..........Is that important to do?  Can you stack them to run the exact same time?  I am sure I am not the only one who is wondering this?

They are correct.

You can adjust the video comments to */15 * * * *. This will help a lot.

Thanks I made that change............

the crons can run at the same time, though can prove taxing on the server. i have never understood boonex's consideration in running a cron job every minute on the minute. 

though many things have changed in regards to the cron jobs and the fact they are in the database and you dont have 10 cron jobs listed on your cron task file, and only firing one cron job, but the better approach depending on exactly how many cron jobs are listed in the database, what you have added, then staggering the time implementation is all a matter of choice really. 

even though you set a cron to fire */15, but it takes 30 mins to complete, have you really accomplished what you set out to? so not only is the time setting important, knowing how long the task takes is also important, since there is not much use in setting a cron to fire */15 and the task is taking 30 mins.