I agree with rudy. 512 Mb is very low !! It is even low for just running OS on a server !

My SQL-servers has 4 Gb RAM !

Of course will I not remove it from model !! Mistake by me  !!

How about remove it from msdb , tempdb  and distribution ?? What will happend ??

I just want to secure...

Is it happening every night, or ?? At the same time ???

There is nothing in the system log ??

Does any program stop due to backup at the same time ??...