I'm just with a simple doubt. My files of backup are variating in weight... sometimes they get lighter then the previous one. Is it a problem? or just compression?

If my backup is broken, will i see the site as usual with a problem in some part or will i have a big white screen describing errors in database? that is: is it ok if my backup is as expected in a single page? or is there a possibility of my site to get a problem only in some pages?

thanks!

Comments

There are DB tables like watchdog, access, sessions, all the cache tables etc that contain temporary data that gets cleaned out occasionally. That could account for backups that shrink occasionally.